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post #1 of 4 Old 12-27-2017, 11:38 PM Thread Starter
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1990 WIRING HARNESS

1990 WIRING HARNESS QUESTION

Engine Harness (passenger side) Dash Harness (Driver side) are two independent harnesses with the exception of two large round connectors under the brake booster. Any one have a wiring diagram for these plugs. What do they do? If you go stand alone engine control and get rid of the engine harness and computer what happens?

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post #2 of 4 Old 12-28-2017, 12:09 AM
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Originally Posted by SC90FOX View Post
1990 WIRING HARNESS QUESTION

Engine Harness (passenger side) Dash Harness (Driver side) are two independent harnesses with the exception of two large round connectors under the brake booster. Any one have a wiring diagram for these plugs. What do they do? If you go stand alone engine control and get ride of the engine harness and computer what happens?
If you mean get RID of the engine harness and computer, what happens, you will have to describe for me what "stand alone engine control" means. I am well into understanding exactly how Ford's EEC-IV works, and what wiring is absolutely mandatory, but have not kept up with today's aftermarket developments. I'd like to learn, though.

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post #3 of 4 Old 12-28-2017, 07:19 AM Thread Starter
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See link for Stand Alone https://www.summitracing.com/search?...eyword=550-606

What I really want is a wiring diagram for the 2 plugs that connect both harness.
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post #4 of 4 Old 12-29-2017, 11:25 AM
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YOU WANT evtm for your year

Try ebay

89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
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