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Discussion Starter · #1 ·
ok im %90 complete on installing my wire harness but i cant seem to get my tail lights working.my tail lights have 3 wires coming out of them.1 for the top bulb and 2 for the bottom.i have 3 wires running to them.1 for tail lights,1 for turn signal and 1 for back up light.i assume the backup wire goes to the single wire on the top.now which wire do the other to go to or does it matter?and is one of the wires for the ground or does the housing just ground to the body?any help would be great.i cant wait to get this beast on the road.
 

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You are right, the single wire is the back up wire.

the turn/ brake wire, goes to which ever wire gives the brightest light (should be a red wire)
the tail light, should go to the other. I believe it is a tan wire.

the ground, is through the metal case, as you figured.
 

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Yellow/bk -left turn and brake to red wire on light (female of two pin con.)
Green -right turn and brake to red wire on light (female of two pin con.)
brown-tail lights to brown wire on light (male of two pin con.)
Black- backup lights
This is from my 72 wiring diagram.
 

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diagram

[smg id=1188]
 
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