80 F-100 Light Problem

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Aug 1, 2009 | 04:23 PM

Steven_tx

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Joined: Aug 2009

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80 F-100 Light Problem

Hey guys,

I've got a 1980 F-100, trying to get it back on its feet. Heres what we got:

When lights are on:

Front lights are on
Rear lights are off

When emergency lights on with lights on

Front lights function correctly
Back lights flash, but not constanly on

When turn signal is on and lights are on:

Left side functions correctly in front, back flashes but not constantly on
Right side functions correctly in front, back flashes but not constantly on

When brakes are pressed and lights are on:

Brake lights comes on, but normal lights are not on

So as you can tell, we can't get the rear lights to come on when the lights are turned on. We've checked the fuses under the steering wheel. No obvious defect in the wiring.

Any ideas?

Thanks in advance!

Aug 1, 2009 | 08:27 PM

86bigred

Fleet Mechanic

Joined: Apr 2007

Posts: 1,429

Likes: 4

From: patricia ab canada

sounds like bad grounds.here's a link follow franklins instructions ,let us know what happens

https://www.ford-trucks.com/forums/8...ke-lights.html

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