So I bought this 97 ZJ few months ago and everything was good until recently it developed a strange Battery Drain.
I'm on my 2nd battery to no avail.
I recently found that after the key is shut off and removed the HVAC Auto unit after about 1 minute comes on but the screen is very dim, also the compass overhead and VIC come on! The VIC says rear lamp failure for about 30 seconds then goes off, then comes on again in a few minutes and says the same thing.
Also the Blower comes on with the HVAC unit as well, if I turn the HVAC switch off the blower and HVAC unit goes off and stays off, but the VIC and overhead compass and auto dim mirror stay on!
This is driving me nuts and runs the battery down.
When I start it up with the key all systems return to normal until the next key off.