1999 TJ electrical issues

[TLCJ5]

Driving in to work this AM my volt meter suddenly pegged to 19+V. All other guages were good. Engine was running fine,lights on. My first thought was that the voltage regulator in the alternator took a dump. I figured if the alternator was putting out high voltage I might be able to draw it down little by turning on all the heater fan,fog lights,rear defroster etc...about a block later the voltmeter went back to normal. I was now just down the street from work so I turned the extra electrical stuff off & parked in my normal spot. Shut the engine off & tried to restart.....nothing. No dome lighth no electrical at all. Popped the hood...conections all felt tight. At break I'll go out & check what I can,but does anybody here have any ideas? By the way...the battery is about 2 weeks old.(Farm & Fleet AGM)
Thanks!!

 

[TJ_Jeep]

Sounds like you have a bad connection to the battery, i know from experience that without a connection to the battery your voltage gauge will peg to 19V, it is also not good for the computer as it can fry it. Hope this helps

 

[TLCJ5]

Thanks for the response!! The bad connection was my first guess too...although on first glance/try the battery terms are tight I'm thinking maybe a bad cable.
I'll pursue along those lines.

 

[TLCJ5]

Removed,cleaned & retightened the battery cable connections...amazing how much corrosion after just a few weeks...all is well now...I'll coat the connectors with "no ox" to keep 'em clean.