AWR-fix: DIY repair of window control module (switch)

[andrewwynn]

This is the damage to the PCB under the relay.



After cleaning up



The pad separated from the trace. It would not be reliable to repair the trace so jumper is the solution.



When I removed the relay two pins were corroded enough they didn't survive. I had to solder jumper wires to the nubs inside the relay.



Found the transistors that control the relays on the board topside and traced some convenient jumper points.



The best places I found to add jumpers were via holes where the trace goes through the board. In both locations the via is in a set of three and is the middle one.

Most people will only have to jumper the down jumper and possibly the ground jumper for the down. (Marked with Green arrow not labeled).

Check the points marked with the blue and yellow arrows they should be zero Ω. If they aren't add a jumper wire I recommend 30ga wire wrap wire but 26-28 would probably fit.

Its easier to poke the wire through and solder from the back side.

Prep the solder pad first (small drill bit with finger force works well or x-acxto. Be careful you don't cut the trace)

You can solder directly to the pads of the transistors which will be easier for less experienced folk but you have to be quick as possible. You will kill the transistors if you apply too much heat (boy have I learned that lesson the hard way!)


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