[W126 Coupe] Strange gauge lights error, any ideas?
Markus Meyer
markusfmeyer at gmail.com
Wed Feb 24 05:45:33 EST 2010
Josh,
I'd start by checking battery voltages, resting (car not on) and with car
running (this shows your alternator voltage), and go from there. Any idea
what alternator was put in, where it came from, was it new, rebuilt, new
regulator used, etc?
Once you rule out a charging problem, you can move on to other things like
the OVP.
Markus
On Wed, Feb 24, 2010 at 2:27 AM, Josh Allen <heyallen at null-ptr.net> wrote:
> Ok, I have a strange fault in my 500 SEC currently, and I can't find any of
> the threads that I could have sworn I'd read on it.
>
> When I start the car, the charging system indicator glows dimly, as well as
> the brake wear light and the empty fuel system light, but both of the latter
> lights are around half the intensity of the charging system light.
>
> I thought I'd heard that these were indications of the OVP going, and it
> did have some nasty 'foamy' corrosion or flux buildup on the back of the
> circuit board which was easily cleaned off and then resoldered for safety's
> sake.
> The fault recurred two days after, but not immediately after having
> resoldered it. (It even persists with the OVP completely removed, and no
> other issues seem to show up??)
>
> The alternator was replaced around 2000 miles ago, due to the rear bearing
> failing catastrophically, but I haven't probed the output voltage yet, as
> today when I went to drive it and found the issue was persisting, it was
> raining heavily.
>
>
> Any ideas would be greatly appreciated, or even pointers on search terms
> that would point me in the right direction.
>
> Thanks,
> -Josh Allen
> The MB Coupes Website!
> W126 SEC Mailing List
> Postings remain property of MB Coupes, L.L.C.
>
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