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Sohc wiring question

289 Views 5 Replies 4 Participants Last post by  Guardians3000GT
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Some rats were chewing on some coil pack wires and I have a question.

I was experiencing spark related driving problems a few days ago and decided todo a tune up and when it came time to swap to a new coil pack I noticed some rats had helped themselves to the wires (in the past AND recent past) I was building myself a new harness when I noticed I have a disconnected wire and no idea if this wire was disconnected when I had the car running good a week ago.

The wire in question goes to what looks like a capacitor and maybe an igniter. It is Part of the MALE end of a plug. The capacitor and other business are connected to the FEMALE side of the plug.

The wire in question is bright green with a white stripe. This gives me a clue.

The wire in question, when "plugged in" connects to a brown wire leaving one of the electrical doo-hickeys. That doo-hickey has two wires coming out of it. A black one and that brown one I was just talking about.

Based on those clues, I'm hypothesizing, that this lone disconnected wire MIGHT be a ground.

Please look at the pictures and send me ANY feedback or trolls.

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The wire in question goes to what looks like a capacitor and maybe an igniter. It is Part of the MALE end of a plug. The capacitor and other business are connected to the FEMALE side of the plug.

The wire in question is bright green with a white stripe. This gives me a clue.

The wire in question, when "plugged in" connects to a brown wire leaving one of the electrical doo-hickeys. That doo-hickey has two wires coming out of it. A black one and that brown one I was just talking about.

Based on those clues, I'm hypothesizing, that this lone disconnected wire MIGHT be a ground.
Not sure what year you’re SOHC car is, but I only have electrical prints for ’92-’94 SOHC cars and a Green/white wire nor a Brown wire are shown. However the circuit is the same and as you can see from below print, that “doo-hickey has two wires coming out of it” is actually a noise filter. It is to suppress radio static which the capacitor also helps to do but it might also help smooth out spikes in voltage to coil :unsure:. If the brown wires where originally white before they browned from age, then the below print might be correct with wire colors. The Green/wire wire in your pictures might have been installed at some point to replace a bad wire, also the loose end you’re referring to looks to be just shielding for that wire which would have been hooked to ground from shielding of a normally white wire that would have run to TCU of a automatic trans cars (see highlighted in below print).

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I can't help with your electrical issuue but I can tell you a trick that may help keep the rats at bay. Try placing dryer sheets all over your vehicle. Rats and spiders tend to avoid places where dryer sheets are laying about.
Wonderful suggestions thank you very much. The more I look at the wire the more it does look aftermarket and the wire is probably not connected to anything.
I have a 99 sohc and had issues with trash wiring from old age, and repaired all of that. I can take some pictures of my wiring when I get home, I also have my 1999 3000GT factory service manual set and can upload the wiring diagrams for that area as well.
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