M-103: too many issues for the title... - PeachParts Mercedes-Benz Forum

400Eric · #11 12-29-2009, 02:35 AM

OVP fuse was blown. It's really exasperating cause I just checked that about 10 days ago and about a month ago too cause I've been chasing several other issues as well (like the high idle problem I posted about here http://www.peachparts.com/shopforum/showthread.php?t=266488). In that thread I spoke about how I had read many posts about OVP issues, but I didn't think that that problem was caused by the OVP (but I did check the OVP anyway just to be sure and the OVP was still good at that point.) So after having checked it a few times already, I didn't think to check it yet again. Johnathan1's post made me connect some dots though when he brought up the ABS light angle, that was something I didn't have before and that is something I see associated with OVP issues on the other threads. That's why I checked it yet again today. Thanks guys!

Any idea why the fuse blew? I'd like to prevent it from happening again. And how come my OVP only has one fuse not two?

All is not well though. I still have this battery drain issue that is pretty bad. I have confirmed the issue is still there by touching the clamp to the battery post and getting a pretty big spark out of it. It's a fairly noisy spark too I might add. Before I have to resort to GSXR's method (which I really don't have time for right now), are there known trouble areas/weak links where I should look first?
(BTW GSXR, I've already stopped the air leak in the trunk [it was the trunk lock unit after all] so no, this battery drain issue isn't from the pump running all the time.)

Also haven't had any aux. cooling fan action for a while. You can peg that temp. gauge and it still won't come on. Any known trouble areas/weak links I should try first? Thanks to all who help.
Regards, Eric