What is the purpose of relays in electrical system on Buick Rainier?

Several electrical accessories in a vehicle, such as the fuel injection system, horns, starter, and fog lamps, use relays to transmit the electrical signal to the component. Relays have a control circuit and a power circuit, with the control circuit opening and closing the power circuit. If a relay is defective, the component will not function. Most are found in the engine compartment or fuse boxes. To test, remove and check it for continuity using an ohmmeter. The terminals of ISO relays are numbered to indicate their circuit connections and functions.

Genuine Buick Rainier Relay

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7 Relays found

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Buick Rainier Fuel Pump Relay
Part Number: 13500114
$11.10 MSRP: $22.92
You Save: $11.82 (52%)
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Product Specifications
- Other Name: Relay Assembly, Accessory Time Delay Cutoff Gray
- Replaces: 12088567, 12135170, 19116057, 92199312, 12193606, 12135034, 19115080, 15328866, 15393412
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Buick Rainier | 4 DOOR | 6 Cyl 4.2L, 8 Cyl 5.3L
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Buick Rainier Fuel Pump Relay
Part Number: 13503102
$8.19 MSRP: $17.80
You Save: $9.61 (54%)
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Product Specifications
- Other Name: Relay, Voltage And Glow Plug
- Replaces: 12193604, 15328864, 12088592, 12177236, 12088576, 12193614, 12135175
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Buick Rainier | 4 DOOR | 6 Cyl 4.2L, 8 Cyl 5.3L
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Buick Rainier Flasher
Part Number: 15231201
$47.75 MSRP: $92.26
You Save: $44.51 (49%)
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Product Specifications
- Other Name: Flasher, Hazard Lamp & Turn Signal; Flasher
- Replaces: 12450284, 15101912
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Buick Rainier | 4 DOOR | 6 Cyl 4.2L, 8 Cyl 5.3L
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Buick Rainier Relay
Part Number: 15016745
$40.41 MSRP: $76.24
You Save: $35.83 (47%)
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Product Specifications
- Other Name: Relay, Headlamp; Relay
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Buick Rainier | 4 DOOR | 6 Cyl 4.2L, 8 Cyl 5.3L
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Buick Rainier Relay
Part Number: 15319851
$37.24 MSRP: $70.26
You Save: $33.02 (47%)
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Product Specifications
- Other Name: Relay, Air Suspension And Inflator Unit; Relay
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Buick Rainier | 4 DOOR | 6 Cyl 4.2L
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Buick Rainier Fuel Pump Relay
Part Number: 13500126
$12.21 MSRP: $23.04
You Save: $10.83 (48%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Relay Assembly, Windshield Wiper Motor Black
- Replaces: 19116058, 92181835, 92199311, 12135180, 12077866, 15328867, 19115082, 15393413
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Buick Rainier | 4 DOOR | 6 Cyl 4.2L, 8 Cyl 5.3L
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Buick Rainier Actuator Relay
Part Number: 19119238
$61.58 MSRP: $89.27
You Save: $27.69 (32%)
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Product Specifications
- Other Name: Relay; Actuator Relay, Lock Relay, Relay
- Replaces: 89027051, 12065122
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Buick Rainier | 4 DOOR | 6 Cyl 4.2L, 8 Cyl 5.3L

Buick Rainier Relay

The Buick Rainier Relay protects your SUV's climate system by acting as the electrical gatekeeper. This means it allows low power signals to command the higher draw devices like cooling fans and blower motors to keep the Rainier's cabin comfortable and your warning lights off. A conventional electromechanical Relay utilizes an electromagnetic component to rapidly open or close contacts, sending current to the assigned part. On the other hand, a more modern solid state Relay uses semiconductor circuits to achieve the same result. Removing moving parts allows for a faster response and longer life. Regardless of the style, their aim is the same, which is to provide consistent on off control so one weak link does not disable the A/C chain. In various years, a fan Relay jumps the under-hood fan while dedicated circuitry powers dash vents and directs signals from temperature knobs with each device placed to prevent burn-out of expensive components. By changing a worn-out Relay before pursuing bigger gear saves time and money and keeps the signature Buick ride that every Rainier owner expects. It reminds us why Buick is such a trustworthy badge.

Each OEM Buick Rainier Relay we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Buick Rainier Relay Parts Questions & Experts Answers

Fuel Pump Relay
13500114
Q:
What is the purpose of relays in electrical system on Buick Rainier?
Posted by Tuanita R.
A:
Several electrical accessories in a vehicle, such as the fuel injection system, Horns, starter, and fog lamps, use relays to transmit the electrical signal to the component. Relays have a control circuit and a power circuit, with the control circuit opening and closing the power circuit. If a relay is defective, the component will not function. Most are found in the engine compartment or fuse boxes. To test, remove and check it for continuity using an ohmmeter. The terminals of ISO relays are numbered to indicate their circuit connections and functions.
Answered by GM Parts Specialist Bob / Feb 18, 2025