Ignition switch gremlins
Finally getting my '82 GTV6 back on the road, or so I thought. Drove to a friends yesterday, car started and ran fine. When I went to leave, car would not start, the Battery and Exhaust temp lights only glowed a dim red when the key was turned to the run position. Figured that the battery must have died. Car started with a jump, drove it home, and when I turned the key to the off position it kept running. Did this a couple times and car would not stop. Finally used a PO installed fuel pump cut off switch to kill the engine.
Went to start the car, would not start. Tested the battery and it read 12.25volts. Should be OK. With the negative cable off and nothing on including the clock there seems to be a 3v draw. Think this might be a separate problem as removing each fuse in turn didn't have any effect on this draw.
I did a search for this problem and there was a post back in '09 that sounded similar to this but didn't seem to help me figure out what was up.
So, with a fully charged battery, with the key in the run position, the Bat/Exh Temp warning lights only glow dim red, when turned to start position no starter engagement.
With the key in the run position, and the engine not running I'm pulling 12v. as measured across the ground cable. Is this normal?
Looking for a short somewhere I disconnected each plug from the combi relay with the key in the on position to see if it would make the warning lights go back to the normal bright red. No effect.
I pulled fuse #7, warning lights dim. BUT when I pulled fuse #8 (#7 back in place), warning lights were bright, turned key to start, warning lights went dim and no starter engagement. Lights stayed dim until I pulled neg battery cable, replaced it and then bright again.
With key in off position, there is no current to the +coil terminal. Can't really assess if opening the AFM door activates the fuel pump due to the mentioned fuel pump cutoff switch. All grounds seem to be clean and tight.
I'm tried again and with a jump, even though battery is fully charged the car will start. And again, will not shut off even with the key off and removed.
I'm not the sharpest knife in the drawer when it comes to car electronics and in this case might not even be in the drawer at all.