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Brake light and hazard not working

Tiny
KSOUP26
  • MEMBER
  • 1989 FORD F-150
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Passenger side brake light and hazard quit working, turn signal works. Driver's side all work.
Friday, July 20th, 2018 AT 12:49 PM

3 Replies

Tiny
ROL*S.
  • MECHANIC
  • 61 POSTS
Hi Ksoup,

Passenger side bulbs are okay? Do you need to see a wire diagram? It is added.
https://www.2carpros.com/articles/brake-lights-not-working
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Sunday, July 22nd, 2018 AT 6:16 AM
Tiny
KSOUP26
  • MEMBER
  • 1 POST
Diagram was not for brake lights, have put bulb in from left side. Where does the 12 volts split for left and right? (Ignition switch?)
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Monday, July 23rd, 2018 AT 12:05 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
It spits at the turn signal switch which sounds like it is bad. Here is a guide and the blinker wiring so you can confirm the power loss at the switch:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below). Please run some tests and get back to us.

Cheers, Ken
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Monday, July 23rd, 2018 AT 12:09 PM

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