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1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
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Now break light issues!

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Old Jun 13, 2019 | 09:39 PM
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Now break light issues!

73 highboy, the brake light, and turn signal will only work on one side. There are 4 wires in the harnesses black/ red strip (reverse light), brown (tail lights). Now the other two wires are green and yellow/ black strip. Green wire brake and hazard lights, yellow/ black strip turn signals. The diagram shows green wire to right tail light, yellow/black strip to left tail light. Turn Signal and reverse light work fine. break and hazard light only on the right side. I can only get brake and hazard on left if I switch the wires then nothing on the right. Please help
 
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Old Jun 14, 2019 | 08:09 PM
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Any recommendations?
 
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Old Jun 14, 2019 | 11:37 PM
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https://www.ford-trucks.com/forums/1...n-some-15.html


Look at Post #7 and then all the way on page 15 at Post #216 for help.

I am having problems as well, but can't do the turn signal switch check yet.
 
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