Brake lights/turn signals

1993 FORD F-350
97,000 MILES • V8 • 4WD • AUTOMATIC
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GBROCKSCHINK
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I have no brake lights, turn signals or hazard lights FRONT OR REAR. The parking lights DO work front and rear. The turn signal switch, flasher unit and ignition switch have been replaced and all fuses and bulbs have been tested. The dash indicator bulbs also do not flash or come on and stay on like if a bulb was out. Nothing. I do have power too the hazard switch, and like I say, it has been replaced. Bulbs are all good. HELP!! I have no wiring diagram. Any ideas would help me TONS!!! Thank you so much!!!!
Sep 2, 2010 at 6:11 PM
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KHLOW2008
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Hi gbrockschink,


Lets start with checking the brake lights. At brake switch, check if you have battery voltage at Light Green/Red wire. If yes, disconnect the connector and use a jumper to bridge across the terminals. If brake lights comes on, the brake switch is bad.

Check out the guide below on using a test light, it will help


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


Wiring diagrams fro the turn signal circuit are attached below
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Sep 3, 2010 at 8:20 AM
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RICOCHET
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My left blinker is blinking fast. I have replaced all of the bulbs on the left side and all bulbs in the rear lights are new. I also have no stop light on the left rear light. I have used a continuity test light and cannot detect power in the flasher wire on the left side. Where could the problem be?
Jan 12, 2019 at 6:08 AM (Merged)
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BLUELIGHTNIN6
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Inspect your fuses. If fuses OK, replace signal flasher relay.
Jan 12, 2019 at 6:08 AM (Merged)