Freightliner FL60 electrical problem (Wipers, Radio, ABS...)

Freightliner FL60 electrical problem (Wipers, Radio, ABS...)
Posted: Thu Nov 27, 2008 2:21:50 AM

We have a 2001 Freightliner FL60. It has developed a worsening problem where vibrations (bumps in the road) cause the wipers to shut off and park, the radio to glitch (cut out), and sometimes the ABS light to come on for a second. It started out needing a decent bump to cause it to act up but now it can be just accelerating from a dead stop is enough.

If the wipers aren't on the radio will still glitch and sometimes the ABS light will come on.  While the problem can manifest itself without the ABS light coming on, the wipers and radio will always glitch if I see the ABS light flash on.

The radio simply cuts out for a microsecond and then resumes playing. The wipers go to park. The switch always restarts the wipers. I've tapped, hit, and shook the fuse box and cannot get the problem to repeat. I've shook wires in the dash with no luck either. It seems like the problem got worse with the colder weather but that could be coincidence.

I've not noticed any other symptoms related to this (like lights flickering or the dash acting up)... yet ;-)

So, does anyone have an idea of what might cause the trifecta of problems I am seeing and/or an area where I should focus my hunt? Right now I'm flying blind trying to isolate it. I don't have a wiring diagram for this particular truck but I'm sure that would help if anyone has one or a link.

With the truck sitting still I've never seen a glitch, even with me trying to vibrate something and cause the issue.

Thanks,
Alan Hamilton
akhAThamiltonsystems.us