no lights when u brake

Asked by Feb 18, 2016 at 11:09 AM about the 1993 Ford F-150 XL Extended Cab LB

Question type: Maintenance & Repair

the back lights come on when the lights are on but when u brake thay don't work

11 Answers

5,625

check the fuse, replace the switch~

what one

73,175

It may be the brake light switch on the brake pedal, but make sure the brake light is not burnt out.

it lights up when the head lights are on

73,175

What lights up, gotta be specific I'm not there. The tail lights would light up with the head lights on, you said you have a brake light issue.

yeah ... sorry that is what I mean

73,175

The brake light and tail light is in the same bulb. You may have another set of tail light bulbs above the brake light/tail light, that is only a 1 filament bulb. The brake light/ tail light has 2 filaments in the bulb. Let me ask you this, do the blinkers work in the rear of the truck?

yes thay do

73,175

Ok that narrows it down. Either the brake light relay, brake light switch, or a fuse. Probably the switch or relay.

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Best Answer Mark helpful
5,625

--or a connection of thin air...at the outside of the socket~ yes...your old friend "the Grounding issue"....what one must do is get your multimeter and test for proper ground at the socket~ you'd be surprised at how little the ground actually gets back there~

19,055

If there is ground for the blinker there will be ground for the brake light. Brake fuse or brake switch

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