Chrysler RAM50/D50/Arrow 1979-1993 Repair Guide

Brake Light Switch



See Figure 1

  1. Disconnect the wiring at the back of the switch.
  3. Loosen the locknut holding the switch to the bracket. Remove the locknut and remove the switch.
  5. Install the new switch and install the locknut, tightening it just snug.
  7. Reposition the brake light switch so that the distance between the outer case of the switch and the pedal is 1979-82 models; 0.2 in. (5mm) 1983-93 models;0.020-0.040 in. (0.5-1.0mm). Note that the switch tab or prong must press against the pedal to keep the brake lights off. As the pedal moves away from the switch, the tab is released and closes the switch which turns on the lights.
  9. Hold the switch in the correct position and tighten the locknut.
  11. Connect the wiring to the switch.
  13. Check the operation of the switch. Turn the ignition key to ON but do not start the engine. Have an assistant observe the brake lights at the rear while you push lightly on the brake pedal. The lights should come on just as the brake pedal passes the point of free-play.
  15. Adjust the switch as necessary to get the correct response from the lights. The small amount of free-play in the pedal should not trigger the brake lights; if the switch is set incorrectly, the brake lights will flicker due to pedal vibration on road bumps.

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Fig. Fig. 1: Adjust the brake light switch so that there is 0.2 in. (5mm) between the outer case and the brake pedal-1979-82 models