I just re-soldered my cruise control amp over the weekend. I did every point on the board except the ones for the long rectangular boxes that looked a little different from the rest. I figured those were the microchips that the guy who wrote the DIY on here said he didn't re-do. I decided to follow his lead.

I think it worked; I re-installed it and the cruise works. I don't know if it's totally fixed for sure, though, as the problem was that it wouldn't hold speed when it was cold out, almost always at night. I tested it in the evening.
Kind of chilly, but not enough to know for sure.

Anyway, it took a little while to re-solder all those points. I began to wonder if certain points are usually the culprit on these boards, and if I was fixing things that didn't need fixing. Does anyone have an answer to that? Are there shortcuts for this project that people undertaking it should know about?

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Ralph

1985 300D Turbo, CA model
248,650 miles and counting...