Originally Posted by
onehundred80
I can see no reason for a good solder job to fail, the terminals must be cleaned prior to resoldering and sufficient heat applied to avoid a cold joint. The use of acid flux or acid cored solder will cause future failures as well, only use resin cored solder for electronics.
Some say vibration is the culprit and that is not true.
Poor soldering caused the failure on the original RCMs.
Burnt contacts are the cause of many relays to fail, if they get burnt replace the relay ASAP.
Thanks, I did have to replace with a new one. Even though the solder joints were looking a little funky it wasn't the problem. The center relay was a little discolored but kinda hard to look at the contacts unless removed from board. I checked diode and resistors and went over the entire board solder wise and it didn't help, shut down within a minute or so. For $132.00 on amazon, brand new and the joints all look good. Very dangerous situation when it shuts down (My wifes car) can't have that happen. Thanks for input though!