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Chrysler Crossfire
RCM, Relay Control Module


This is one information page of my collection of what I have repaired on my Crossfire.

Note:
You should not do any repair on your car if you don't have enough experience and knowledge! You use this information at your own risk! Don't blame me if something goes wrong.


Content:

If you have a Mercedes SLK R170 with a 320 engine it's almost exact the same.

Note:
You have to work with the electric parts when removing the RCM module. Disconnect the battery! When disconnecting the battery the alarm and radio will be reset, be sure to have any codes that's needed!

Chrysler Crossfire, 2005

3, Soldering the circuit board:

Now it's time to inspect the circuit board for bad soldering.

Chrysler Crossfire RCM module

The arrow point to the three soldering points which is common to be bad. But I also check all the other soldering points, all of them were ok. You need a magnifying glass to see it.


Chrysler Crossfire RCM module

With high magnification you see the problem with the bad soldering. They are not soldered correct. Strange, how could Mercedes do a mistake like this ? Must have cost them a fortune to correct it on all cars, even the Mercedes has this RCM module. Maybe the soldering machine couldn't handle the edges of the circuit board and got to low temperature here when soldering.


Chrysler Crossfire RCM module

Maybe this step was not necessary, but I suck away the old tin. Sorry, couldn't hold the soldering iron in place for illustration when taking this photography.


Chrysler Crossfire RCM module

I got to remove most of the old tin.


Chrysler Crossfire RCM module

Soldering the three contact points, place some solder paste on it before to handle any left corrosion better.


Chrysler Crossfire RCM module

Now it looks much better, I don't think you have to do this once more the coming ten years. Cleaned it up and put it back in the enclosure.


Chrysler Crossfire RCM module

Gentle push it down until the hooks grab the lid.

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