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Hi,
I have an issue going on/off about 2 years for now. It is rare but still annoying. 98% of the time the Vette starts fine hot and/or cold.
The 2% I have no start issue. no click from the starter solenoid. I think the "security" light is on and "Brake" indicator is on when I try to start. The 1985 doesn't have VATS system, it has a starter interrupt relay (new) and a theft deterrent control module (original). the horn works but I don't hear the alarm while I can't start the Vette.
the power doors works but it seems the buttons of lock/unlock don't work well. When I have NO START issue, I also try to go out of the car and lock/unlock the driver door with the key, still no start. Also moved the gear lever, No luck.
The only workaround I know to start the Vette, is to apply 12V from the positive to the purple wire that goes to the S terminal or back to C100 connector (I'm not sure). After this workaround, I can start it when key is ON.
The starter is a new AC Delco mini starter. Was installed a year ago.
1- any idea what can cause the issue? Ignition switch?
2- where the purple wire goes? (to the S or back to C100)?
Thanks.
Last edited by Yariv; Jun 1, 2022 at 12:43 PM.
Reason: Add info regarding the starter
I don't know the answer to your problem. I just wanted to say your question is explained and written "better than average". It will give the experts something to work with. Dan
The next time it happens try replacing your starter interrupt relay. I say that because you know your starter works, you know your starter solenoid works, you know your ignition works, but your relay you said you bypass with 12v to the starter solenoid and the car starts normally. So you know all the other components works but the relay. Start there to rule out a bad relay.
Hi,
The starter relay is new. once I had this problem "live", I took it off and bypassed it with a wire (A to D. grn/wht to purple).
I've found this video. I'll replave the ignition switch and follow up it.
Its an automatic tranny. Yes, while ago when I got a NO START issue I took off the cluster and lever covers/panels. I bypassed all but nothing. I only managed to start it by applying 12V grom the battery to the purple wire (The pic above).
1985 Auto: rare NO START issue
