My 04 MC started having some weird issues tonight. About 5 or 6 times the entire electrical system blinked off, then came right back on. Fan, radio, lights, etc. The car didn't die, and it did it while i was driving. I thought i would see if anyone else has had this issue before taking it in to the dealer. I just had to replace the battery a few weeks ago, so i wasn't sure if it could be related to that at all. Thanks in advance for any thoughts!

 

Re check the battery connections. Look for any corrosion at the ends of the cables and possible cracks or wear in the cable insulation (especially the positive cable).

 

Check the wiring harness in the area of the Powersteering motor

 

https://www.northamericanmotoring.co...d.php?t=113247 I am having similar issues. The 42 pin connector just under the fuse box on the driver's side had lots of corrosion in it. I have had to buy new plastic housings and a fair number of the pin connectors.

 

Thanks for the suggestions. We checked the battery cables, and the connections were oh-so-slightly loose. I haven't had the problem again for two days now. I'm hoping that's all that it was and not just an unknown glitch that will keep popping up!