Oldsmobile 25524845 Switch Assembly, Stop Lamp & Cruise

Cruise control maintains a set vehicle speed in normal driving conditions. It mainly uses vacuum to run a throttle servo, overseen by the Cruise Control Module (CCM). Features include cruise, coast, resume/accelerate, and "tap up/down" speed adjustments. Activation typically starts above 25 mph (40 kph). Key components are mode switches, CCM, servo unit, Vehicle Speed Sensor (VSS), vacuum supply, release switches, and harnesses. The system retains vacuum at the set position, with the controller managing three vehicle/system states. Components include the vacuum servo, EMC Controller/Actuator, Electronic Module, and VSS, supplemented by a Vacuum Accumulator for consistent performance.

Disconnect the switch's electrical harness. With assistance, depress the brake pedal fully and remove the switch from the clip near the pedal. Replace the old clip in the bracket, insert the new switch until seated, release the pedal to its stop, reconnect the harness, and test the system.

The switch is located on a flange or bracket protruding from the brake pedal support. With the brake pedal fully released, the plunger on the body of the switch should be fully pressed in. When the pedal is pushed, the plunger releases and sends electrical current to the stop lights at the rear of the car. Electrical contact should be made when the pedal is depressed 38 to 64 inches; if not, the switch can be adjusted by turning it in or out as needed. To replace a faulty switch, disconnect the electrical coupler (two couplers if the car is equipped with cruise control) and loosen the switch locknut until the switch can be unscrewed from the bracket, with installation being the reverse of this process.

Take away the brake light switch on models that were made in 1994 and beyond by unplugging the cable from the negative pole of the battery. Then, if necessary take off side knee bolster for a driver. After that undo the retainer holding brake switch and master cylinder push rod to brake pedal. Remove brake light switch and master cylinder push rod from brake pedal, also disconnect electrical connector from switch. Finally pull out the switch out of your automobile. Fit over a slave cylinder pushrod and secure to the pedal using a retaining clip as you install this type of machine on it first. Connect harness electrical connector into it. The rest installation steps are same as removal method but in reverse order. The self-adjusting nature of this kind of switch means there is no need for any adjustment . Check operation of brake lights after fitting,please .

Unscrew the switch from its mount.

Unplug the electrical harness from the switch.

To remove the brake light switch on 1994 and later models, you need to follow these steps: 1. Disconnect the cable from the negative terminal of the battery. 2. If necessary, remove the driver's side knee bolster. 3. Remove the retainer securing the brake switch and master cylinder pushrod to the brake pedal. 4. Detach the brake light switch and master cylinder pushrod from the brake pedal. 5. Disconnect the electrical connector from the switch. 6. Finally, remove the switch from the vehicle.

After installing the new switch, you should connect the wiring and battery, and ensure that the brake lights are working properly.

When the pedal is pushed, the plunger releases and sends electrical current to the stop lights at the rear of the car.

After releasing the brake pedal, repeat the previous step to confirm that no additional clicks are audible and verify that the stop lights are operational.

When the pedal is pushed in, the plunger releases and sends electrical current to the stop lights at the rear of the car.

Insert the switch into its mount from the rear until the switch body is up against the mounting clip.

Reconnect the electrical lead.

You should note that audible clicks can be heard as the threaded portion of the switch is pushed through the clip toward the brake pedal.