Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1990REGAL CUSTOM, 3.8 L, 4T60/ME9REPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEMADJUSTMENTSBRAKE LIGHT SWITCH
1990 Buick Regal Custom, 3.8 L, 4T60/ME9
Brake Light Switch
1990 Buick Regal Custom, 3.8 L, 4T60/ME9SECTION Brake Light Switch
- Remove left sound insulator panel. Depress and hold brake pedal. Using a stiff wire with a hooked end, gently pull switch set lever forward (toward front of vehicle) and listen for an audible click. Click indicates release of automatic adjuster. If no click is heard, release brake pedal and repeat step procedure.
- After automatic adjuster has been released, pull brake pedal rearward. Listen for switch to ratchet into set position. A minimum of 3 clicks of the ratchet should be heard.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.