electrical problems after wiring harness replacment
02-24-2013, 05:16 PM
#1
Rennlist Member
Thread Starter
electrical problems after wiring harness replacment
I'm trying to get my car running after completely replacing the wiring harness due to an engine fire and im running into several (possibly related) issues.
1) the starter solenoid does not engage when turned to start (no volatge to the solenoid).
2) the diag plug on the drivers side does not get full voltage, and if I try to run anything off it (say my uego), the voltage drops to 0.
Its as if the dme is not driving any outputs, or not turned on.
I've been debugging the diag plug issue, since I thought it would be easier. Here is what I ahve done:
1) wire brushed all grounds
2) check ground resistance, all looks good
2) used the uego as a test light and jumpered it to the ignition pin on the dme connector (this proves that the dme is receiving a good ignition signal)
3) jumpered at the dme connector, the igniiton pin to the diag port pin. This effectively made the diag port a switched 12v straight from the ignition. This worked fine (no breaks or shorts in the wire).
4) replaced the dme
and finally,
5) hooked up a different wiring harness to a new dme (I plugged it into the 12 pin connector and hooked the grounds up). this effectivly changed out both the wiring harness/diag pin and the dme to new ones. This new setup exibits the EXACT same behavior.
I'm at a loss of what to try next. it seems like I have some fundamental thing not hooked up, but I cannot figure out what.
1) the starter solenoid does not engage when turned to start (no volatge to the solenoid).
2) the diag plug on the drivers side does not get full voltage, and if I try to run anything off it (say my uego), the voltage drops to 0.
Its as if the dme is not driving any outputs, or not turned on.
I've been debugging the diag plug issue, since I thought it would be easier. Here is what I ahve done:
1) wire brushed all grounds
2) check ground resistance, all looks good
2) used the uego as a test light and jumpered it to the ignition pin on the dme connector (this proves that the dme is receiving a good ignition signal)
3) jumpered at the dme connector, the igniiton pin to the diag port pin. This effectively made the diag port a switched 12v straight from the ignition. This worked fine (no breaks or shorts in the wire).
4) replaced the dme
and finally,
5) hooked up a different wiring harness to a new dme (I plugged it into the 12 pin connector and hooked the grounds up). this effectivly changed out both the wiring harness/diag pin and the dme to new ones. This new setup exibits the EXACT same behavior.
I'm at a loss of what to try next. it seems like I have some fundamental thing not hooked up, but I cannot figure out what.
02-24-2013, 07:30 PM
#3
Rennlist Member
Thread Starter
That wire seems to only go one way, due to the red/black connector that attaches to the wiring harness near the brake booster.
But, I have disconnected the alt and the starter to remove them from the equation, and I still get the same problem. Its as if the dme is not turning on, and not driving any output signals.
But, I have disconnected the alt and the starter to remove them from the equation, and I still get the same problem. Its as if the dme is not turning on, and not driving any output signals.
02-24-2013, 09:55 PM
#4
Rennlist Member
Thread Starter
02-25-2013, 01:22 PM
#6
Drifting
