Posted by Ben on November 14, 01 at 07:15:55:
In Reply to: Re: Intermittant wipers posted by Al in SoCal on November 14, 01 at 06:55:41:
Add that there are two spring loaded contact arms rubbing on circular traces on the board. The contact points on mine were worn flat, so I resoldered a "ball" of solder onto the arm ends. You'll see once you remove and check it out. Make sure you clean off the mounds of grease on that area, it's filled with metal filings and can short out something. Regrease with "dialectric" silicon grease found in any good auto supply. Used lots and made sure to coat the whole are to keep a good supply in there.
When resoldering the component leads, make sure you don't over heat as it will ruin solid state devices. Most of the cold solder joints on mine were on the connector leads. My guess is that the heat/time in the solder bath was designed more for the solid state components than the much larger connector leads. Those connector leads can survive a much higher/longer soldering cycle. Cold solder joints are usually visually with "un" shiny solder fillets, cracks between the lead and solder and cyrstallized structures on the solder fillet surface. If you don't know much about this, any good hobby or electronics (even Radio Shack) can help you.