I've had problems with two new Mopar voltage regulators. The first is the MP resto unit showing part # 3438150 in yellow text. That one works intermittently. The other was DOA when I purchased it, also showing part # 3438150, but in white text; the part # on the box is 77R06286.
I have a no-name parts store regulator on the car that works great; I just wanted one with the Mopar logo.
Both of the Mopar units are painted black, and I'm suspicious that these regulators need a good ground to operate properly, and that the black paint around the mounting holes is preveting proper operation. I especially don't want to scratch up the latter one to find out, as it is new enough that I can return it.
Do these newer Mopar units commonly fail? Is a chassis ground required on these regulators?
Thanks,
Jim