I have the one in my SD that does not work, and a junkyard one that also does not work in the SD. The circuit board of the junkyard one looks fine, no burned patches or bad looking solder joints, but the cruise does not respond at all with either amp in place. Do you think both amps are bad, or do I have another problem?

I would be interested in sending my junkyard amp in if it is the problem. I just have the board, no metal case. It was too hard to get the bracket free at the junkyard.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine