Quote:
Originally Posted by Brenner41
That's what I was wondering if I accidentally ripped out a ground but I'm not exactly sure where to check. I looked for any loose wires or disconnected ones and didn't see any. If you could point me where to check.
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Can you try to start the car with a jumper pack? The battery might have developed a dead cell incidentally, this should be ruled out first.
If that does not solve the issue; it has been a while since I have been behind the dash, but there are several grounding terminals on the firewall. They can be seen most easily when the head unit is removed with as much of the aftermarket wiring harness.
The easiest one to reach is visible on the upper right side behind the head unit slot.
Removing the glove box will help to see/reach other ones as well.
FYI; I managed to rip out a ground without noticing when working on my rear view camera once, and was shocked how easy it was to just sever the thin cable.
In any case, the car *should* start just fine without a head unit, so if it does not, I believe you should further diagnose the issue in this "default state" without any aftermarket unit/harness connected.
As far as I have tested, there is absolutely no interaction between the OBD and the head unit in these cars.
Another thought: Do you have a wiring diagram for the Radar Detector? You said the wiring was shoddy, so there might have been some mysterious connection keeping the car alive?
Sadly I have no idea how these things are supposed to be wired, since Radar is not used in my country and any detection stuff is highly illegal anyway.
Assume it needs at least 12V power source and a ground (which might have been compromised during the removal)?