After a mud filled day of wheeling my 1998 TJ 4.0 Automatic the voltage meter on the dash is reading 0 after I start it and drive a few minutes and the check gauges light comes on. I had both the battery and alternator tested twice at 2 different places with the battery and alternator in the Jeep and out of the Jeep and both tested good. One place tested and said it came up as a bad voltage regulator, which I found out is built in to the ECU/ECM/PCM. After reading up on this and seeing it might be a bad ground or loose wire I disconnected the battery and took off and cleaned every wire I could see. All battery terminals,alternator wires,frame grounds,body grounds and anything else I could disconnected and check under the hood. While I was doing this the battery was charging and I put everything back together and went for a ride and about 2 minutes in the check gauges light comes on and the volts drop to 0. I tested the volts with a multi meter while the jeep is running at the battery and it was 12 and then I put the negative probe on a frame ground and it reads between 1-5 and sometimes jumps to 12 if I move it around.
Anything else I could check out before getting a ECU or external voltage regulator?
Has anyone done the external VR before?
Anything else I could check out before getting a ECU or external voltage regulator?
Has anyone done the external VR before?