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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

87 & 91 F250 Wiring Question

 
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Old 04-12-2016, 08:36 PM
jwoods
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87 & 91 F250 Wiring Question

First post, but have used this forum for info for a few years. My son and I have purchased a 1987 & 1991 F250. Our goal is to make 1 truck out of both. 87 frame, interior and dash, 91 body & bed, motor (351) & auto trans. We are putting the 87 dash and the harness (from the fire wall) into the 91 cab. The issue we are running into is the harnesses are not the same, connectors and wires are different colors.


Will the harness work? If so, does anyone have both schematics so we can switch connectors and make sure everything gets wired up correctly?


Thanks in advance.
 
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Old 04-13-2016, 04:08 PM
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welcome to FTE.


if you are going to use the 87 dash and in-cab harness, you are also going to have to use the 87 engine bay and rear section harness.
as you already found out, the 87 harness is not compatible with the 91 harness.

i went through this to put a 87 gas engine cab on my 88 diesel. i had to put the 88 cab wiring into the 87 cab.
 
 
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