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Re: When I turn on head and tail lighs, my brake lights...
Check for a defective tail light,or rear socket light,circuit wiring touching each other at trailer plug if equip.usually damaged wiring are at rear of truck,unless wiring mod.were done under dash!
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adjust brake light switch which is located above brake pedal. depress pedal and screw the switch clockwise a complete turn then try your lights if not working repeat process until they come on
Check the brake light switch on the brake pedal. Sounds like it slipped out of adjustment. When pedal is depressed, the button on switch will extend and be on to pass current to the bulbs.
Also, you need to figure out the tail lights: those two filament bulbs are for park lights and for brakes/turn signals. One filament is for the parks, the other filament is for both brake and turn signals. American cars have the brake lights wired through the turn signal switch- from the brake light switch on the brake pedal to the turn switch, and then out to the rear bulbs for brakes and, or turn signals.
Adjust the brake pedal switch located on the upper side of the brake pedal under the dash. To adjust the stop light switch, disconnect the two wires attached to the rear of the switch, move the switch by loosening the lock nut towards the brake pedal. As soon as the center pin of the switch begins to touch the brake pedal notch, rotate the switch half turn more and lock it by tightening the lock nut. Connect the wires back and ask your companion to see the tail lamps while you depress and release the brake pedal. Or you can see the tail lamp behavior by parking the car on reverse at a distance of one foot from any wall.
WHAT YOU MIGHT CHECK IS THE FUSE FOR TAILLIGHTS, OR DASH LIGHTS. THEY WORK OFF THE SAME FUSE. IF THE FUSE IS BLOWN THE HEADLIGHTS WORK BUT NO TAIL OR DASH LIGHTS
under the dashboard on the drivers side. look at the brake pedal lever. there should be a switch attached. push switch in and twist to remove. then pull the button as far out as it will go. while holding brake pedal down reinstall switch. then pull pedal up to top. this will reset the brake light switch. if they stay on still, then just replace the brake light switch.
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