I had someone from the forum resolder mine. He is a professor who teaches electronics, and he tested out all the components, except for the microchip. I believe he said the chip is programmable...and that the only way to test it is to know exactly what the programming is.

It turned out that, yes, the joints needed resoldering...but also the electrolytic capacitors were bad. He replaced them, as well as the other caps...and sent it back to me.

When I sent it...it did not work at all...nothing...zippo. When I got it back....the cc now works sporadically. This particular car is from the east coast. It has lots of rust underneath...and there is corrosion around the engine compartment, so I am inclined to believe that other things are mucking with the cc. So many things can screw with it...speed sensors...tail lights..who knows...this car was not well cared for.

My other 1990 300TE is a California car...in excellent condition...no rust...just beautiful...and the cc has always worked perfect...never a hiccup.

You might want to consider replacing the caps since you have the thing out. He did say that one in particular was a strange value.

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1990 300TE....all comments are about this car...in case I forget in the actual post