I am having some electrical issues on my 99 TL. Two days ago my car would not start and I needed to be jumped. After being jumped the car ran fine for about 35 miles. After that, while driving I had all my warning lights come on and my gauges started to flicker. Then, I lost power to everything. When I pulled over the car still had enough voltage and amps to run but none of the accessories worked. I placed the car in nuetral and rev'd the engine a bit and the gauges and lights responded. As soon as the car decellerated I lost them again. The car finally died and I was stuck. The battery was 6 years old so I replaced it and also had the alternator tested. The results of the test were good. At an idle the alternator was charging at about a 13.33v average. Under acceleration it went to 14.4v so that was good.

Today at work I checked to see if I was grounding ok and cleaned up the connectors. I then checked to see if I had a power to ground issue and sure enough I do. I disconnected the battery and checked just from the positive cable to ground and I get continuity. Somewhere I have a power to ground issue but I am having no luck. I have tested the alternator and starter and dont have issues there. I also went through and did the same continuity test while disconnecting each relay and fuse in the main box under the hood. I still had the issue. I am at a loss now and can figure out what could be causing this. Any help would be great.

 

some 99's have had problems with the ignition switch on some vehicles.

any aftermarket accessories installed?
did you disconnect the batt+ from the fuse box before testing?

i pm'ed you if you need further help

 

Thanks. I also found out about the ignition switch issue after a little digging. I disconnected it and no longer have the power to ground issue. Wife is on the way with a new one. Hope that does the trick. The switch was pretty pitted.