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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 05-07-2008, 05:42 PM   #1
87Stallion
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Default 87-93 Under Dash Wiring Harness

Are the under dash wiring harnesses all the same for fox bodys? Im wondering if a inside harness from a 4-cyl will work in my GT and does it have to be a 87 like mine?
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Old 05-07-2008, 06:38 PM   #2
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Default RE: 87-93 Under Dash Wiring Harness

Some people say they are the same. I've done a few swaps and every time the 4 banger harness would screw up the gauges. When I changed them over with a 5.0 harness everything worked fine. So, IMO, the 4 banger harness will cause problems. The dash harness from a 87-93 5.0 will work fine for you, they are all the same. The engine harnesses were different on certain years. Hope this helped!
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Old 05-07-2008, 06:54 PM   #3
87Stallion
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Default RE: 87-93 Under Dash Wiring Harness

Was that because you had 4 banger guages? Just wondering if it would work on a 5.0 with original 5.0 guages. My thinking is the harness itself should be the same. Just wanted to ask before I try it. I have looked at several 4-cyl harnesses and I can't find any differences but that doesn't mean that there isn't.

The previous owner butchered the inside harness on my car.
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Old 05-07-2008, 07:29 PM   #4
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Default RE: 87-93 Under Dash Wiring Harness

That was with the 5.0 gauges installed.
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Old 05-07-2008, 07:29 PM
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1993, 1994, 50, 87, 8793, dash, diagram, gt, harness, lx, modified, mustang, underdash, wire, wiring

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