Tony,
this type of circuit card is "wave soldered", in a machine that takes the card, populated with all the parts, and runs it into a machine holding the card above a pool of molten solder. the machine has a ram at one end of the pool that generates a wave on the solder surface, high enough to wash the non-component side of the board. Where the board has component leads coming through solder pads, the solder adheres and makes (hopefully) solid connections.
Such connections are quite fine, thin layers of solder. Therefore, regular automobile vibrations can cause them to flex and break over time. But the breaks can be very fine and invisible to most eyes.
The solution to these breaks is to take a fine soldering iron and rewet EACH solder point on the board (being careful to NOT short between any traces!!). Almost by definition, the process of rewetting the connections will lead you to add more solder than was originally there, thereby reducing the possibility of repeated cracks (but also increasing the possibility of shorts across adjacent traces - IF you aren't careful).
Tom
In a message dated 2/2/2012 3:44:06 P.M. Pacific Standard Time, aldridgetony97@yahoo.com writes:
I think Tom is right, that is the cruise module, I swapped mine for a PAP one and cruise worked better for a while. But it just failed again. I have the old module apart, and cannot see any obvious damage, someone said to solder the copper bar connections, would that help?
Cruise is important to me because of back issues.
Tony
--- In diesel_mercedes@yahoogroups.com, audiolaw@... wrote:
>
> I believe that that is the infamous cruise control amplifier module that
> ALWAYS fails.
>
> Doesn't have anything to do with horn, lights, etc.
>
> Tom
>
>
>
>
> In a message dated 2/2/2012 5:34:21 A.M. Pacific Standard Time,
> alstheone@... writes:
>
> It's the small aluminum box with a tab on the top screwed to a bracket
> just to the right of the parking brake mount under the dash. It has 10 pins
> for the plug on the bottom. the P/N 001 545 52 32 is etched into the face.
>
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