+1. We had the driver's seat fail intermittently and then both stopped working. I soldered all of the connections on the circuit board (other than the resistors, etc.). I didn't remove the original solder first; I just put more over the top of each. Worked like a charm.

Thanks for the advice.

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1987 911 Carrera Cabriolet (weekend car)
2009 Prius (daily driver--keeps me sane)
2011 Mercedes GLK350 (wife's car)
1998 Mercedes C280 (son's car--keeps wife sane)