On my 1994 SLS the switch will operate both side mirrors up, down, and left, but will not move the mirrors right. Is this likely a switch or wiring problem? Now I'm gonna check my service manual. Thanks for any input!

 

Disregard. I tested the switch and it was bad. I disassembled it and there was a trace worn through on the edge of the PC board where it rode against the plastic, so I soldered a wire across it. Unfortunately, the L/R selector switch came apart upon disassembly and it now has to be fiddled with to get the mirrors to operate, but it'll do until I order a used switch from ebay.