1990 Engine Wiring Harness Schematic - Injector Wire Colors

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1990 Engine Wiring Harness Schematic - Injector Wire Colors

Unread postby FoMoCo17 » Fri Oct 12, 2018 7:41 pm

Does anybody have a color coded engine wiring harness schematic for specifically a 1990 Mustang GT? Specifically, interested in the injector wiring colors. I am aware of the ones at veryuseful.com but think their colors for this year could be off.


Thank you for your help!
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Re: 1990 Engine Wiring Harness Schematic - Injector Wire Col

Unread postby decipha » Fri Oct 12, 2018 10:40 pm

this is all i got
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Re: 1990 Engine Wiring Harness Schematic - Injector Wire Col

Unread postby FoMoCo17 » Sat Oct 13, 2018 1:55 am

Thanks Decipha, that’s what I have and have been going by for my 90 GT. Just can’t figure out why my cylinder balance test is starting on Bank 2 rather then Bank 1 and def is concerning since all my adjustments just don’t be to be smoothing it out at the lower rpms as I thought it should.

If anyone can verify that this test starts on Bank 1 or Bank 2 would be very helpful! If Bank 2 and wideband mounted on drivers side it shows the cylinders/injectors shorting out immediately in succession as test is initiated.
FoMoCo17
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Joined: Sat Oct 15, 2016 3:03 pm
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Vehicle Information: 306 Forged Assembly w H Beam Rods and Girdle, Kenne Bell 2.1, E7 Ported Heads & Intake, Kenne Bell FMU, 19# Accel Injectors, BBK Fuel Pressure Regulator/Gauge, Stock Cam (+2 degrees), 1.7 Crane Roller Rockers, 60 mm throttle Body, 55 mm MAF w stock sensor, BBK Cold Air Inlet, BBK Shorty Headers, BBK H-pipe, Autolite 24 Plugs, EGR & Thermactor Enabled, 2 1/2 MagnaFlow SS, built AOD w 2400 Hughes Converter, Flex-a-Lite Cooling Radiator/Module Assy., 130 Amp Alternator

Re: 1990 Engine Wiring Harness Schematic - Injector Wire Col

Unread postby KLRPMKN » Sat Oct 13, 2018 12:38 pm

Heres a shot of the injector harness diagram from my Ford factory 1990 wiring diagram book. Hope it helps....
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Re: 1990 Engine Wiring Harness Schematic - Injector Wire Col

Unread postby FoMoCo17 » Sat Oct 13, 2018 3:17 pm

Definitely helps and from what I see, it’s exactly as their wired. Now gotta figure out why my cylinder balance test is starting on Bank 2 as my wideband n QH are showing me ....rather then Bank 1 which would seem logical and what I was told it does.
FoMoCo17
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Posts: 7
Joined: Sat Oct 15, 2016 3:03 pm
Name: Doug
Vehicle Information: 306 Forged Assembly w H Beam Rods and Girdle, Kenne Bell 2.1, E7 Ported Heads & Intake, Kenne Bell FMU, 19# Accel Injectors, BBK Fuel Pressure Regulator/Gauge, Stock Cam (+2 degrees), 1.7 Crane Roller Rockers, 60 mm throttle Body, 55 mm MAF w stock sensor, BBK Cold Air Inlet, BBK Shorty Headers, BBK H-pipe, Autolite 24 Plugs, EGR & Thermactor Enabled, 2 1/2 MagnaFlow SS, built AOD w 2400 Hughes Converter, Flex-a-Lite Cooling Radiator/Module Assy., 130 Amp Alternator


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