Why won't my 2005 Chevy Tahoe, Southern Comfort Ed, start with a good battery?

[Josh H]

I have a 2005 Chevy Tahoe that won't start. When I turn the key over to Aux., everything turns on; radio, lights, dvd, gauges, everything. However when I try to turn it over, it just clicks and everything shuts off. I checked and all cables are on tight. Just to be sure I replaced the battery and the bolt connectors with no success. If I try to jump the Tahoe while the cables are connected to the battery, nothing happens. But if I disconnect the positive cable from the battery and hook the jumper cable directly up to it, it fires right up. I'm completely stumped!

[jose j]

Well my Expedition did the same thing, and what I did was take out every fuse 1 by one, and put them back in as you take them off.(take it off and then put it back in) and well it started.

[mike p]

Sounds like you have a cell in the battery shorting out when under a heavy load. You can take it to a AutoZone, they will do a load test on the battery for free.