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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Wiring harness dead end

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Old Feb 27, 2021 | 04:55 PM
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ArizonaF250's Avatar
ArizonaF250
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Wiring harness dead end


Hey Everyone.....1986 Ford F250 7.5l. Have these 2 harnesses that dead end but they look pretty important. There is so much that doesn't work on this truck electrically. Anyone know where these go?

Thanks everyone.


 
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Old Feb 27, 2021 | 05:31 PM
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From: Culver
If they are on the Driver Side, they are for the Duraspark II Ignition Module for the Distributor
 
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Old Feb 27, 2021 | 06:15 PM
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The 4 wire plug is..
Coil positive, the fat wire
oil pressure
water temp
4th might be a Key ON 12 volt power source wire


JIm
 
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Old Feb 27, 2021 | 06:42 PM
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https://www.ford-trucks.com/forums/1...l#post19526247

The plug circled in red is the tach plug. Do you have a factory tach in the dash? If you don't, you don't need this plug.

Jim
 
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