How are the Side View Mirrors controlled on Cadillac CTS?

On these models, the outside mirrors are controlled by the Driver Door Switch Assembly (DDSA), which houses the mirror control switches, the Driver Door Module (DOM), and the front Passenger Door Module (PDM). The DDSA interprets the mirror control switch movements while the door modules supply the battery voltage and ground to their different mirror motors to move the mirrors. The electric rear view mirrors use two motors for adjustments: one for up and down and another for left-right. The control switch has a selector that sends voltage to the left or right side mirror. With the ignition in the ACC position and the engine OFF, roll down the windows and operate the mirror control switch through all functions for both mirrors, listening for the sound of the electric motors. If the motors can be heard but the mirror glass doesn't move, there may be a problem with the drive mechanism inside the mirror, necessitating a complete replacement. If the mirrors don't operate and no sound is heard, check the fuses. If the fuses are fine, remove the mirror control switch and have its continuity checked by a qualified service department. Additionally, check the ground connections. If the mirror still doesn't work, remove it and check the wires for voltage. If there's no voltage in each switch position, inspect the circuit between the mirror and control switch for opens and shorts. If voltage is present, remove the mirror and test it off the vehicle with jumper wires, replacing it if it fails this test.

What is the role of the Body Control Module and how should one troubleshoot Side View Mirrors issues on Cadillac Escalade?

Some of these models are fitted with a Body Control Module (BCM) that integrates several systems into a central module and can therefore be easily diagnosed with a professional scan tool. The BCM controls door locks and unlock, power windows and the ignition lock and security system, interior lights including the DRL's, horn, wipers, heat/AC, power mirrors etc. If the vehicle does not operate as intended it is advised to seek the help of a dealership service department or a certified auto technician. The electric rear view mirrors use two motors for movement while some are equipped with memory mirrors interlinked with power seat memory and the BCM. Any complications should be solved with help of a professional independent repair facility or local dealer. The switch used for controlling the position of the left or right side mirror is used for passing voltage to it and while ignition is on ACC and the engine not running, the windows should be rolled down and the mirror control switch should be operated through all the positions. The sound of electric motors running in the mirrors must be sought; if motor sound is heard but the mirror glass does not move, then the inner part of the mirror may be spoilt, requiring replacement of the entire mirror. When the mirrors do not work and no noise is produced, the next thing to do is to look for a fuse. If the fuses are all okay, the mirror control switch has to be then disconnected in order to check its continuity at a qualified shop, while the grounds have to be checked. In the case where the mirror is not functioning then the mirror has to be disconnected so as to check for voltage on the wires. Inasmuch as voltage is missing in each switch position, there should be opens and shorts checks in the circuit between the mirror and the control switch. The user can hold the switch and open/closing the door to check whether the contact is lost in any point of the door jamb. If voltage is present, you can test the mirror with jumper wires away from the vehicle but, must refer to various wiring harness diagrams to determine which leads are safe to apply to not damage the mirror drive motors. In the event the mirror does not meet this test, then it should be replaced.

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985 Side View Mirrors found

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Cadillac Mirror, Outside Rear View (Reflector Glass Only)
Part Number: 20778441
$170.23 MSRP: $255.65
You Save: $85.42 (34%)
ADD TO CART
Product Specifications
- Other Name: Glass, (Dl3) Rear View Mirror, Outside; Mirror Glass
- Position: Rear
Fits the following Cadillac Models:
- Escalade | 2009-2014 | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.2L Flex
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Cadillac Glass,Outside Rear View Mirror
Part Number: 22919747
$116.93 MSRP: $175.60
You Save: $58.67 (34%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Glass, (Dl8) Rear View Mirror, Outside; Mirror Glass
- Position: Rear
Fits the following Cadillac Models:
- Escalade | 2015 | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB | 8 Cyl 6.2L
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Cadillac Mirror Kit, Outside Rear View
Part Number: 23444110
$129.77 MSRP: $194.89
You Save: $65.12 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Mirror Kit, Rear View Mirror, Inside & Outside; Mirror Glass
- Position: Rear
Fits the following Cadillac Models:
- Escalade | 2015 | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 REGULAR CAB, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB | 8 Cyl 6.2L
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Cadillac Mirror Assembly, Outside Rear View *Service Primer
Part Number: 20756788
$483.72 MSRP: $729.75
You Save: $246.03 (34%)
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Product Specifications
- Other Name: Mirror, (Dl3) Rear View Mirror, Outside; Mirror Assembly
- Position: Rear
- Replaces: 25788556
Fits the following Cadillac Models:
- Escalade | 2009-2014 | 1/2 TON, EXT 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.2L Flex
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Cadillac Mirror Assembly, Outside Rear View
Part Number: 15172060
$191.63 MSRP: $287.79
You Save: $96.16 (34%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Mirror, (9G1) Rear View Mirror, Outside; Mirror, Mirror Assembly
- Position: Rear
- Replaces: 15044489, 15745509, 15703395
Fits the following Cadillac Models:
- Escalade | 2002-2005 | 1/2 TON, 3/4 TON, EXT 1/2 TON, EXT 3/4 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L, 8 Cyl 6.0L
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Cadillac Mirror Kit, Outside Rear View (Lh Lower Glass)
Part Number: 15933019
$50.50 MSRP: $79.42
You Save: $28.92 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Mirror Kit, (6P3) Rear View Mirror, Outside; Mirror Glass
- Position: Rear Lower Driver Side
- Replaces: 19120897
Fits the following Cadillac Models:
- Escalade | 2015, 2006 | 1/2 TON, 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 REGULAR CAB, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB, EXT 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L, 8 Cyl 6.2L
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Cadillac Mirror Kit, Outside Rear View (Manual Lh Upper Glass)
Part Number: 15933015
$92.38 MSRP: $132.76
You Save: $40.38 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Mirror Kit, (6P3) Rear View Mirror, Outside; Mirror Glass
- Position: Rear Upper Driver Side
Fits the following Cadillac Models:
- Escalade | 2015 | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 REGULAR CAB, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB | 8 Cyl 6.2L
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Cadillac Mirror Kit, Outside Rear View (Electric Rh Upper Glass)
Part Number: 15933018
$269.62 MSRP: $404.91
You Save: $135.29 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Mirror Kit, (6P3) Rear View Mirror, Outside; Mirror Glass
- Position: Rear Upper Passenger Side
- Replaces: 19120896
Fits the following Cadillac Models:
- Escalade | 2015, 2006 | 1/2 TON, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 REGULAR CAB, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB, EXT 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L, 8 Cyl 6.2L
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Cadillac Mirror,Outside Rear View
Part Number: 15172248
$331.73 MSRP: $498.20
You Save: $166.47 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Mirror, (D48) Rear View Mirror, Outside; Mirror
- Position: Rear
- Replaces: 15055275, 15062881, 15760700, 15047906, 15756397
Fits the following Cadillac Models:
- Escalade | 2002 | EXT 1/2 TON, EXT 3/4 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L, 8 Cyl 6.0L
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Cadillac Mirror, Outside Rear View (Reflector Glass Only)
Part Number: 25892978
$261.93 MSRP: $373.19
You Save: $111.26 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Glass, (Dl3) Rear View Mirror, Outside
- Position: Rear
Fits the following Cadillac Models:
- Escalade | 2007-2008 | 1/2 TON, EXT 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.2L
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Cadillac Mirror Assembly, Outside Rear View W/O Cover
Part Number: 23331704
$441.25 MSRP: $662.67
You Save: $221.42 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Mirror, (Dl8) Rear View Mirror, Outside; Mirror Assembly
- Position: Rear
- Replaces: 23463307
Fits the following Cadillac Models:
- Escalade | 2015-2016 | 1/2 TON, 1500 4 DOOR, 1500 4 DOOR SUV, 1500 4 DOOR UTILITY, 4 DOOR 1/2 TON | 8 Cyl 6.2L
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Cadillac Mirror,Outside Rear View (Reflector Glass & Backing Plate) *LH
Part Number: 19159237
$158.49 MSRP: $227.76
You Save: $69.27 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Glass, (6P3) Rear View Mirror, Outside; Mirror Glass
- Position: Rear Driver Side
Fits the following Cadillac Models:
- Escalade | 2005 | 1/2 TON, 3/4 TON, EXT 1/2 TON, EXT 3/4 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L, 8 Cyl 6.0L
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Cadillac MIRROR ASM-I/S RR VIEW
Part Number: 13540314
$226.02 MSRP: $333.43
You Save: $107.41 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Mirror Inside
- Position: Rear
- Replaces: 13588023, 22968614, 13509166, 13580911
Fits the following Cadillac Models:
- ATS | 2014-2019 | 2 DOOR COUPE, 2 DOOR LUXURY COUPE, 2 DOOR PERFORMANCE COUPE, 3 DOOR PREMIUM COUPE, 4 DOOR LUXURY SEDAN, 4 DOOR PERFORMANCE SEDAN, 4 DOOR PREMIUM SEDAN, 4 DOOR SEDAN, V-SERIES 2 DOOR COUPE, V-SERIES 4 DOOR SEDAN | 4 Cyl 2.0L, 4 Cyl 2.5L, 6 Cyl 3.6L
- CT4 | 2020-2024 | LUXURY SEDAN, SEDAN, SPORT SEDAN, V-SERIES NOTCHBACK-BLACKWING, V-SERIES SPORT SEDAN | 4 Cyl 2.0L, 4 Cyl 2.7L, 6 Cyl 3.6L
- CT5 | 2020-2024 | LUXURY SEDAN EXT, LUXURY SEDAN EXTENDED, SEDAN EXT, SEDAN EXTENDED, SPORT SEDAN EXT, SPORT SEDAN EXTENDED, V-SERIES NOTCHBACK-BLACKWING, V-SERIES SPORT SEDAN EXT, V-SERIES SPORT SEDAN EXTENDED | 4 Cyl 2.0L, 6 Cyl 3.0L, 8 Cyl 6.2L
- CTS | 2014-2019 | 4 DOOR PERFORMANCE SEDAN, 4 DOOR PLUS SEDAN, 4 DOOR PREMIUM SEDAN, 4 DOOR SEDAN, 4 DOOR V-SERIES SEDAN | 4 Cyl 2.0L, 6 Cyl 3.6L, 8 Cyl 6.2L
- ELR | 2014-2016 | 2 DOOR COUPE | 4 Cyl 1.4L Flex
- XTS | 2014-2019 | 4 DOOR NOTCHBACK, LUXURY 4 DOOR NOTCHBACK, PLATINUM 4 DOOR NOTCHBACK, PREMIUM 4 DOOR NOTCHBACK | 6 Cyl 3.6L
View More
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Cadillac Mirror Assembly, O/S Rr View *Chrome M
Part Number: 84228896
$383.77 MSRP: $546.79
You Save: $163.02 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Mirror Assembly
- Position: Rear
- Replaces: 23351800, 23241618, 22970651, 84041615
Fits the following Cadillac Models:
- Escalade | 2015 | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 REGULAR CAB, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB | 8 Cyl 6.2L
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Cadillac Mirror Assembly, Outside Rear View W/O Cover *Black
Part Number: 23251490
$292.90 MSRP: $417.32
You Save: $124.42 (30%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Mirror Assembly, O/S Rr View W/O Cvr *Black
- Position: Rear
- Replaces: 20862667, 20953699, 25836394, 22847423
Fits the following Cadillac Models:
- SRX | 2010-2016 | CROSSOVER 4 DOOR | 6 Cyl 2.8L, 6 Cyl 3.0L, 6 Cyl 3.6L
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Cadillac Mirror Assembly, Inside Rear View
Part Number: 15850531
$274.56 MSRP: $391.19
You Save: $116.63 (30%)
ADD TO CART
Product Specifications
- Other Name: MIRROR, Inside/Outside Rear View; Mirror Inside
- Position: Rear
- Replaces: 25743653, 25713654
Fits the following Cadillac Models:
- CTS | 2003-2004 | 4 DOOR, V 4 DOOR | 6 Cyl 3.2L, 6 Cyl 3.6L, 8 Cyl 5.7L
- SRX | 2004-2009 | 4 DOOR, 4 DOOR(RHD), SRX, V8 4 DOOR | 6 Cyl 3.6L, 8 Cyl 4.6L
- STS | 2005-2009 | 4 DOOR | 6 Cyl 3.6L, 8 Cyl 4.4L, 8 Cyl 4.6L
View More
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Cadillac Mirror Kit, Outside Rear View (Manual Rh Upper Glass)
Part Number: 15933016
$96.92 MSRP: $139.28
You Save: $42.36 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Mirror Kit, (6P3) Rear View Mirror, Outside; Mirror Glass
- Position: Rear Upper Passenger Side
Fits the following Cadillac Models:
- Escalade | 2015 | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 REGULAR CAB, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB | 8 Cyl 6.2L
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Cadillac Mirror Assembly, Outside Rear View *Service Primer
Part Number: 22776964
$269.81 MSRP: $405.20
You Save: $135.39 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: MIRROR, Inside/Outside Rear View; Mirror Assembly
- Position: Rear
Fits the following Cadillac Models:
- CTS | 2012-2015 | 2 DOOR COUPE, V 2 DOOR COUPE | 6 Cyl 3.0L, 6 Cyl 3.6L, 8 Cyl 6.2L
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Cadillac Mirror,Inside Rear View
Part Number: 15031606
$414.22 MSRP: $786.73
You Save: $372.51 (48%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Mirror, Rear View Mirror, Inside & Outside; Mirror Inside
- Position: Rear
- Replaces: 15732242
Fits the following Cadillac Models:
- Escalade | 1999-2000 | 1/2 TON, 3/4 TON, 4 DOOR 1/2 TON, CLASSIC 4 DOOR 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.7L
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Cadillac Mirror, Outside Rear View (Reflector Glass & Backing Plate)
Part Number: 20888682
$14.50 MSRP: $20.84
You Save: $6.34 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: GLASS, Inside/Outside Rear View
- Position: Rear
Fits the following Cadillac Models:
- DTS | 2010-2011 | 4 DOOR, FUNERAL COACH, LIMOUSINE | 8 Cyl 4.6L

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Cadillac Side View Mirrors

For superior quality and affordable Cadillac Side View Mirrors, consider our website. We proudly present a wide selection of genuine Cadillac Side View Mirrors at unbeatable prices. These OEM parts, supported by the manufacturer's warranty, are also eligible for our hassle-free return policy and swift delivery service.

Cadillac Side View Mirrors Parts Questions & Experts Answers

Mirror Assembly, Inside Rear View
25603373
Q: How are the Side View Mirrors controlled on Cadillac CTS?
A: On these models, the outside mirrors are controlled by the Driver Door Switch Assembly (DDSA), which houses the mirror control switches, the Driver Door Module (DOM), and the front Passenger Door Module (PDM). The DDSA interprets the mirror control switch movements while the door modules supply the battery voltage and ground to their different mirror motors to move the mirrors. The electric rear view mirrors use two motors for adjustments: one for up and down and another for left-right. The control switch has a selector that sends voltage to the left or right side mirror. With the ignition in the ACC position and the engine OFF, roll down the windows and operate the mirror control switch through all functions for both mirrors, listening for the sound of the electric motors. If the motors can be heard but the mirror glass doesn't move, there may be a problem with the drive mechanism inside the mirror, necessitating a complete replacement. If the mirrors don't operate and no sound is heard, check the fuses. If the fuses are fine, remove the mirror control switch and have its continuity checked by a qualified service department. Additionally, check the ground connections. If the mirror still doesn't work, remove it and check the wires for voltage. If there's no voltage in each switch position, inspect the circuit between the mirror and control switch for opens and shorts. If voltage is present, remove the mirror and test it off the vehicle with jumper wires, replacing it if it fails this test.
Mirror Assembly, O/S Rr View *Chrome M
84691681
Q: What is the role of the Body Control Module and how should one troubleshoot Side View Mirrors issues on Cadillac Escalade?
A: Some of these models are fitted with a Body Control Module (BCM) that integrates several systems into a central module and can therefore be easily diagnosed with a professional scan tool. The BCM controls door locks and unlock, power windows and the ignition lock and security system, interior lights including the DRL's, horn, wipers, heat/AC, power mirrors etc. If the vehicle does not operate as intended it is advised to seek the help of a dealership service department or a certified auto technician. The electric rear view mirrors use two motors for movement while some are equipped with memory mirrors interlinked with power seat memory and the BCM. Any complications should be solved with help of a professional independent repair facility or local dealer. The switch used for controlling the position of the left or right side mirror is used for passing voltage to it and while ignition is on ACC and the engine not running, the windows should be rolled down and the mirror control switch should be operated through all the positions. The sound of electric motors running in the mirrors must be sought; if motor sound is heard but the mirror glass does not move, then the inner part of the mirror may be spoilt, requiring replacement of the entire mirror. When the mirrors do not work and no noise is produced, the next thing to do is to look for a fuse. If the fuses are all okay, the mirror control switch has to be then disconnected in order to check its continuity at a qualified shop, while the grounds have to be checked. In the case where the mirror is not functioning then the mirror has to be disconnected so as to check for voltage on the wires. Inasmuch as voltage is missing in each switch position, there should be opens and shorts checks in the circuit between the mirror and the control switch. The user can hold the switch and open/closing the door to check whether the contact is lost in any point of the door jamb. If voltage is present, you can test the mirror with jumper wires away from the vehicle but, must refer to various wiring harness diagrams to determine which leads are safe to apply to not damage the mirror drive motors. In the event the mirror does not meet this test, then it should be replaced.