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87-91 Round Firewall Plug Pinout

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  #1  
Old 03-31-2015, 04:31 PM
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87-91 Round Firewall Plug Pinout

Anybody have a Diagram for the pin out on the round plug for a Bricknose? I need to trace the Tach wire back to the engine harness plugs to make sure im grabbing the right wire at the plugs. I am adapting an IDI engine harness to the factory plugs on the fender of a 5.0 Bronco/F150, and I need to grab the necessary wires for the gauges and to power the GPC and what not. I did a search but couldn't find anything, I was hoping somebody might have a book or something.
 
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Old 03-31-2015, 07:41 PM
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PM ifrythings, he should have the diagram you need.
 
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Old 03-31-2015, 08:12 PM
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Thanks....
 
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Old 04-01-2015, 08:35 AM
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If you find a pin-out please post it back in this thread as other have looked for this also and not found one.

The only place I know of where one might be found is in the large fold out wiring diagrams for the 1989-1991 Ford trucks and vans.
 
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Old 04-02-2015, 12:23 AM
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I wish I could find those ones too, though youd need at least 3 different sets of manuals to get everything as 87 is its own year and 88-89 are another and 90-91 is the last one.

I know in 88-89 they added DRL which added a few more wires and pobably moved others and the frame harness plugs change in this time too and in 90-91 is when the E4OD was introduced and that added even more for the overdrive cancel switch and brake signal.

I have pinouts for most of 92 and up and 94 and up has the firewall connector pinout if someone needs that one.
 
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Old 09-25-2016, 08:27 PM
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1995 F-250, need pin at firwall just under brake diafram. I think it is C202. Thank you
 
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Old 09-25-2016, 08:31 PM
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If some one has an 87, Let me know. I'm up against this:

 
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Old 09-26-2016, 07:48 AM
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Has anybody found one yet? I'm subscribing too.....my 87 has had an engine swap and the tach was never hooked up by the PO. The round harness pin-out would help me greatly.
 
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Old 05-31-2017, 08:59 PM
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If it will help here is a pin-out for a 1990 F-series.


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