Something killing batteries in my 99 Tahoe? 130,000 miles 5.7

[qukon 95]

Ac clutch shouldn't click at all with the ignition key out. Get alt checked or use a multi meter on batt to see it it's over 13 volts while motor is running.

 

[willxfs]

The relay for the ac compressor is stuck to the on position. Mine did this exact same thing last summer. I verified this with the multimeter then pulled the relay, opened it up and sure enough it was stuck in the position that completes the circuit. Twelve dollars and a new relay later the problem was fixed.

 

[GTOHOE]

Thanks! I put the multimeter meter on it and it was 12.2 off and 14.8ish running i disconnected the compressor and no dead battery looks like i'll get a new relay and get my nine iron out for the old one! four!!! pos relay what a ordeal this was right out of nowhere. Thanks willxfs for confirmation on the relay appreciated the info.. glad thats over with..