Brake light and hazard not working

1989 FORD F-150
150,000 MILES • 5.0L • V8 • 2WD • AUTOMATIC
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KSOUP26
Passenger side brake light and hazard quit working, turn signal works. Driver's side all work.
Jul 20, 2018 at 12:49 PM
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ROL*S.
  • ✓ASE Certified Mechanic
  • 61 POSTS
  • ASE Certified Mechanic
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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Jul 22, 2018 at 6:16 AM
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KSOUP26
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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?)
Jul 23, 2018 at 12:05 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,503 POSTS
  • ASE Certified Mechanic
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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Jul 23, 2018 at 12:09 PM
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