TomBerlin

I'm moving this from the C-4 general tech section hoping for help here-

94 ZR1- I do not know the history of the car, it has been sitting with a dead battery. When I got a good battery in it the security light on the console remained lit, although it has now gone off. I'm not getting a ground signal to the starter relay. The ignition switch/clutch switch circuit works. I do not have a functioning remote.
Any ideas?

Thanks in advance,

TomB

TomBerlin

One more tidbit to try to get you guys to help with this problem- I believe the ground signal I'm missing for the starter relay comes from the ECU. I believe the anti theft system may be my problem. I don't know where to go from here, apparently there's a proprietary GM scan tool which would tell me what to do next.
I hate giving up and sending them to the dealer, but that's next.

Thanks for reading,
TomB

LT5corsa

Tom,


Sending you a PM.





David

Goldcylon

Either a clutch switch bypass is in order or its all in the VATS

8388

If it's a weak signal from the ecm to the starter, you can bypass the ecm by jumping off the big purple wire found under the ecm using a relay wired directly to the battery.

TomBerlin

Thank you for the replies.

The starter solenoid is energized by the starter relay which is to the left of the steering column. The ignition switch sends a signal through the clutch switch and fuse box to the relay. That signal circuit is completed by a ground in the ECU. I'm not getting that ground. My guess us that this is either security system trouble or ECU trouble.
What is the VATS?

Thanks,
TomB

Redline7g

VATS is the Vehicle Anti Theft System.