Dead short....

I have a 1999 Classic with 12.7 S60. The problem is at random times (couple times a week or 1 to 2 times a day, it varys) a big drain on the voltage shows on gauge, relay kicks (have yet to figure which one, none overly hot) and engine shuts down like you flipped the key off. The relay resets and kicks again from drain on system. This goes on for about 10 minutes and everything's back to normal. And you can not make the problem show up when my mechanic is around. He did find a corroded fuse holder to computer, but that wouldn't cause electrical drain. No codes showing. Any idea's guys and girls?

 

Good idea, alternator was replaced about six weeks ago. Wires have been traced and only problem found was ground from alternator had insulation rubbed off. Wouldn't cause problem but put hose around it anyway.

 

Ok, turns out the stereo had the 'accessory live wire' shorting against a metal bracket. Was overloading the ignition on relay. Ugh.