Misrouted harness cause codes???
08-30-2003, 05:44 PM
#1
TECH Junkie
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Misrouted harness cause codes??? I'm checking my service manual and most codes say a misrouted harness can cause the code. Has anyone actaully gotten codes by having their wires too close to say....ignition coils and such? I have my wires all over the place and now I'm wandering.
08-31-2003, 01:41 PM
#2
Re: Misrouted harness cause codes??? Laying a signal wire too close to a power wire will create all kinds of havoc. Heavy amp flows through power wires create small magnetic fields around the power wire. If a signal wire is close enough to be within this magnetic field, the magnetic field will begin to induce a current flow within the adjacent signal wire.
Signal wires rely on very accurate electrical voltages / frequencies / amps in order to transmit its necessary information. A small induced amperage from the adjacent power wire goofs this all up. As a result the signal wire will begin misreport information. The PCM picks up this funny information and usually sets a code.
There are not alot of heavy power wires in the car capable of doing this. Basically any wire that routes to a separate electrical motor in the car needs to be steered clear of. Additionally, the main power wires in the car need to be steered clear of.
Good Luck
Signal wires rely on very accurate electrical voltages / frequencies / amps in order to transmit its necessary information. A small induced amperage from the adjacent power wire goofs this all up. As a result the signal wire will begin misreport information. The PCM picks up this funny information and usually sets a code.
There are not alot of heavy power wires in the car capable of doing this. Basically any wire that routes to a separate electrical motor in the car needs to be steered clear of. Additionally, the main power wires in the car need to be steered clear of.
Good Luck
08-31-2003, 08:11 PM
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Re: Misrouted harness cause codes??? When I put on LS6 heads and center bolt valve covers I didn't have coil rails yet. I just zip tied my coils to the wires. I went out yesterday after reading my service manual and put the rails on. Man what a differance. The car runs so strong now and my readings are making sense now. Looks like I may get the hang of Edit afterall.
