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I need help with a cut wire in my engine bay. I have confirmed this is an all original #'s matching car. It has the correct P30-A02 ECU. There are 4 heavy gauge grey wires coming from the firewall on the passenger side to the strut tower plugs. The colors are grey/orange, grey/light blue, grey/white and grey/violet. 3 of the 4 wire appear to be wired up in factory condition still. The 1 wire in question is the grey/violet wire that has been cut. I cannot find these grey wires in my Chiltons or Haynes manual. It's really bugging me that the wire isn't hooked up to wherever it goes!
Can anyone provide vide guidance as to what the wire is for and where it should land at?
That is not ONE wire... but in fact, multiple wires wrapped in RF shielding and then insulated in the Grey/Purple outer covering that you have pictured. How about stripping it back and take a picture of the wires inside it and post that here so that we can be of further assistance.
That is not ONE wire... but in fact, multiple wires wrapped in RF shielding and then insulated in the Grey/Purple outer covering that you have pictured. How about stripping it back and take a picture of the wires inside it and post that here so that we can be of further assistance.
ok, stripped the insulation back, it is a single red/blue wire with shielding foil and strands on the outside of it. There is a red/blue wire that I believe it should be hooked to on another harness plug on the same shock tower. The issue is that someone has spliced onto this wire and ran it back to the ecu. I haven't confirmed where it lands on the ecu yet. According to my schematics, a red/blue in the engine bay is for the knock sensor??? I will take some pics tonight to better show what I am seeing...The car used to have an aftermarket alarm system on it...could this be the reasoning for the splice? Doesn't make sense why it would be cut into the knock sensor though? Let me know your thoughts...
Wire that I found cut...this is from the main chassis loom (coming from the passenger side firewall under battery towards 4 passenger shock tower grey plugs.I believe the cut wire circled in red (upper left) should connect to the same colored wire on the 10 pin plug that is also circled in red. The blue wire circled in yellow that has been spliced in goes back through the firewall and lands at the ECU on the same red/blue colored wire. So the blue wire that has been spliced in runs back to this ecu plug location. It appears that maybe the original wire (red/blue circled in red) has been abandoned???? Maybe a continuity problem????
Last edited by craigmel13; Mar 29, 2018 at 03:55 PM.
Reason: Wrong wire color
It is the knock sensor wire... so the question is WHY did someone run a fresh wire from the ECU plugs to the engine harness plugs on the passenger side shock tower ??? The first thing I would do is check continuity between the original red/black wire that passes through the firewall... so from the cut wire in the upper red circle in your last photo above to the wire in your hand in the first (top) pic in your above post. If you have continuity, you could simply reconnect both ends like factory and all is good. If not, there must be a break somewhere along that wire and this is why someone replaced the wire.
It is the knock sensor wire... so the question is WHY did someone run a fresh wire from the ECU plugs to the engine harness plugs on the passenger side shock tower ??? The first thing I would do is check continuity between the original red/black wire that passes through the firewall... so from the cut wire in the upper red circle in your last photo above to the wire in your hand in the first (top) pic in your above post. If you have continuity, you could simply reconnect both ends like factory and all is good. If not, there must be a break somewhere along that wire and this is why someone replaced the wire.
JRCivic...that is exactly what I did, checked for continuity on original wire that was jumpered around. I got good continuity. I soldered everything back up last night. I will see what happens, but I couldn't find a reason as to why it was bypassed.
97 B16A2 cut wire in engine bay?
