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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 07-14-2014, 11:52 PM   #1
tbone5448
 
Join Date: Dec 2011
Vehicle: 1991 ford mustang
Location: wv
Posts: 13
Default 1990 wiring to 1991

OK i thought i bought 1991 engine harness but i thinks its a 1990 because its a mass harness and got two plugs buy test plug brown and grey is there any way to make 1990 engine harness work with the 1991 dash
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Old 07-15-2014, 02:09 AM   #2
dawson1112
5th Gear Member

 
Join Date: Jul 2012
Vehicle: 1990 lx hatch 5.0
Location: ohio
Posts: 2,611
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Im not sure I am following you here. What do you mean by " mass " ?

If you meant mass air flow, then both 90 and 91 are mass air flow cars. As far as the wiring goes , they should be the same between the 2 years.

The 87-89 are different from the 90-93
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Old 07-15-2014, 08:55 AM   #3
tbone5448
 
Join Date: Dec 2011
Vehicle: 1991 ford mustang
Location: wv
Posts: 13
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I thought read somewhere where 1990 and 1991 wiring was different

Last edited by tbone5448; 07-15-2014 at 08:58 AM.
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Old 07-15-2014, 10:08 AM   #4
tbone5448
 
Join Date: Dec 2011
Vehicle: 1991 ford mustang
Location: wv
Posts: 13
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The 90-91 harness interchange with small mods. The 90 & 91 harness will work. For some reason the harness that connects the doors is different. Got this info off http://www.corral.net/ so does anybody if this is correct
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Old 07-15-2014, 10:08 AM
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