Yeah, that sounds like a classic cracked solder joint symptom. Fix is to remove the part, and resolder the joints where the connector meets the board. Only way to know for sure is to open it and inspect.

You could also have a bad connector on the wire side of things, but probably less likely.

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition