Dash Cluster Printed Circuit Board differences

super70bird said

... In the first pic, the PCB in the middle is from the 74. Notice that the ammeter (2 holes all the way at the right) is NOT powered from the PCB, it's got its own wires which connect to it. In the next pic you can see that the 76 PCB powers the ammeter. So there are 2 extra pins in the main plug to feed the ammeter.

Click to expand...

Just eyeballing the copper foil traces in that second picture, I was wondering if they could take the full charging current. Also, I didn't _think_ Ma MOPAR had ever run the full alternator current through the dash printed circuit. Then I noticed that needle in the gauge shown in picture #1 is sitting centered, and the needle in the gauge shown in picture #2 is sitting at the far left end of its' travel. From that, I came to the opinion that the cluster in pic,#2 features a VOLTmeter, and #1 is indeed an AMPmeter.

I could be wrong, and certainly don't know everything, but that's what it looks like to me. Also, I notice that in addition to the two extra pins to feed what I suspect is a VOLTmeter, the rest of the pins are clocked differently, which may have resulted in wrong voltages being sent to the gauges that "got fried". I hope this helps, and if I'm wrong, OOPSSsssss!!!

BC