87-91 Round Firewall Plug Pinout

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Mar 31, 2015 | 04:31 PM

RacinNdrummin

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From: Maple Valley, WA

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.

Mar 31, 2015 | 07:41 PM

Vadis

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From: BC, Canada

PM ifrythings, he should have the diagram you need.

Mar 31, 2015 | 08:12 PM

RacinNdrummin

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From: Maple Valley, WA

Thanks....

Apr 1, 2015 | 08:35 AM

subford

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From: Easton,Ks

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.

Apr 2, 2015 | 12:23 AM

ifrythings

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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.