View Single Post
  #2  
Old 01-21-2008, 08:28 PM
patbob's Avatar
patbob patbob is offline
Its a Whatsit
 
Join Date: Oct 2006
Location: Portland, OR
Posts: 839
Quote:
Originally Posted by whunter View Post
Help please.
Is this a new problem, or a new car with the problem?

If someone installed the radio with the acc pwr & always-on (clock/mem) wires reversed, it might do what you describe. Depends on the radio though.

As for wipers, I haven't been inside the MB units yet, but don't they have some internal contacts that turn their power off when they get to return position? That's how others I've worked on are -- you pulse the power enough to get the blades to move off their return stop, and then the internal switch keeps the motor running until they get back into return position. If the switch were broken or out of adjustment, it might think it isn't all the way in return position and go through a cycle to get them there as soon as you turn the ignition on.

Then there's always the old standby "it's a grounding problem"
__________________
'83 300DTurbo http://badges.fuelly.com/images/smallsig-us/318559.png

Broadband: more lies faster.
Reply With Quote