1990 gt dash wiring harness - MustangForums.com



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Old 09-07-2009, 08:22 PM   #1
bigt8156
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Default 1990 gt dash wiring harness

Hey Guys I have a question. I have to replace the dash wiring harness on my mustang. I got one out of a 93 lx I need to know if they are year specific or can I use this one. Or do I need to get one out of a gt.
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Old 09-07-2009, 10:46 PM   #2
stang8689
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i would try to get one out of any 93 with same engine but you should atleast get one out of a 90-93 cause of air bag and guage cluster is different
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Old 11-21-2009, 10:07 PM   #3
johndeeregreen
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go to very useful.com and look at the harness schematics you can use the 93 harness its just that some 91 harnesses are specific and you can't mix 91 and prior with 91 and later
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Old 11-21-2009, 11:33 PM   #4
ALMOST STOCK
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Hopefully this helps.

87-88 harness Non Calif, SD will fit 87-89
88 Cali-89, MAF will fit 87-89
90 MAF, 90 only
91-92 MAF 91-92 only
93 MAF, 93 only.
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Old 11-22-2009, 01:10 AM   #5
mjr46
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I believe one of the main differences is the location of the fuel pump relay changed from under the seat to out under the hood, so harness is different
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Old 11-22-2009, 12:03 PM   #6
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Quote:
Originally Posted by mjr46 View Post
I believe one of the main differences is the location of the fuel pump relay changed from under the seat to out under the hood, so harness is different
Exactly.

Some other differences also.

87-88 has no airbag connectors, no mass air connector
89 has no airbag connectors, has a mass air connector.
90 has mass air, airbags, and you need to look where the harness connects to the headlight/alternator harness, has a grays and black connector.
91-92 has mass air, airbag, only one relay by the mass air connector (A/C wide open throttle), and has brown headlight / alternator plugs.
92-93 has mass air, airbag, TWO relays by the mass air plug (A/C wide open throttle and the fuel pump relay), and has the same headlight / alternator plugs (only difference being the fuel pump relay).
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