no lights when u brake
10

Asked by Brian 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
223,915

Rowefast answered 8 years ago

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

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10

Brian answered 8 years ago

it lights up when the head lights are on

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223,915

Rowefast answered 8 years ago

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.

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223,915

Rowefast answered 8 years ago

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?

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223,915

Rowefast answered 8 years ago

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

2 people found this helpful.
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Bob_ answered 8 years ago

--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~

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61,205

Andrew answered 8 years ago

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

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