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Old 12-23-2012, 05:20 PM   #1
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Mystery wire at firewall

I'm installing switches for some after-market lights and, as I was pulling wires through the firewall I found this loose wire, no idea what it is, hoping someone here will know. It's forward of the transmission hump, just inside the firewall, sort-of above and to the right of the gas peddle; black, looks like maybe 18 gauge, has round female connector on loose end, connector is maybe 5/16 or 3/8 diameter; there's maybe 4-5 inches of wire w/ connector on end, it was tucked up behind ducting. Any ideas appreciated;
David Rowell

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Old 12-23-2012, 05:38 PM   #2
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Probably for the light for an automatic shifter shift pattern plate.

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Old 12-23-2012, 08:10 PM   #3
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Originally Posted by Jerry Bransford View Post
Probably for the light for an automatic shifter shift pattern plate.
That'd be my guess. My manual trans. TJ has a wire with a connector like you described coming from the general area and is just laying inside the center shifter console.
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Old 12-24-2012, 10:51 PM   #4
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mystery wire

So, if it had an auto trans, power for shift pattern light? And, I take it, Jeep wired them up that way even tho manual trans? By the way, this is a 97 TJ w/ 2.5L I4, stock manual 5 speed tranny;
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Old 12-26-2012, 10:10 AM   #5
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So, if it had an auto trans, power for shift pattern light? And, I take it, Jeep wired them up that way even tho manual trans? By the way, this is a 97 TJ w/ 2.5L I4, stock manual 5 speed tranny;
You got it! I had no idea what that wire was until I did my manual to auto swap. I was happy that I did not have to run any wire
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Old 12-26-2012, 10:12 AM   #6
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That's how you get costs down in mass production.....One wiring harness does all. Cheaper for them to have one harness and include the spare wire than having to deal with two harnesses.

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