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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Backup light wiring

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Old Aug 14, 2005 | 06:16 PM
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MustangGT221
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Backup light wiring

I swapped a ZF into my F-150, and reconnected the backup light to the electrical connector on the trans. I went from an M5OD to a ZF. Now, my backup lights stay on all the time, and don't really work. I unplugged the fuse to shut them off. Do you guys know why that would happen? I figured the wiring would be the same and it would be plug/play...is it not? The backup light worked on the trans previous to the swap.
 
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Old Aug 14, 2005 | 06:41 PM
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the switch on new trans could be faulty causing it to stay on.
 
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Old Aug 14, 2005 | 06:44 PM
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Originally Posted by MustangGT221
The backup light worked on the trans previous to the swap.
While I don't rule that out, I figure that might not be the case....no?
 
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Old Aug 14, 2005 | 07:11 PM
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you did not change anything else so i would check that first. my vette had a bad switch that did not allow the lights to work. did not look bad, but that was the problem.
 
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Old Aug 14, 2005 | 07:29 PM
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Do you know how the switch comes out?

It occured to me that my statement may be interpreted differently. The ZF came out of my F-250, and in the F-250 it was working ok. Then I took the ZF out of the F-250 and put it in the F-150 and now the lights don't work.
 

Last edited by MustangGT221; Aug 14, 2005 at 07:31 PM.
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