I’m pretty sure this has been covered, but I can’t find it. So the way I understand this the alternator feed into the PDC is eliminated. There is a 140 amp fusible link between the two hot leads going into the PDC what is the purpose of this? Do I need to bring that second lead going into the PDC to the driver side battery or is this not needed?

I’m in the middle of this project, so if anyone has an answer or feedback I’d really appreciate it. It seems like a pretty valid question. Sorry if this has been covered before.

B+ cable from Alternator

You remove the battery + cable that goes from the alternator to the PDC, which is routed in the harness across the front of the engine over to the PDC. Then you shorten it and you should install a breaker as shown in the attached link and connect it from your B+ post on the alternator and connect it to the Battery + on the passenger side battery.

Basically, in a nutshell, the alternator charge line is hooked to the passenger side battery. The engine grounds for the ECM and VP44 are separated and relocated to the driver's side battery, so the ground cannot be cross-polluted by the fact that the positive charge line is run next to the master ground for the engine. AC noise jump in that 4-foot run of wiring. So the mod was to separate the positive charge line away from the master grounds for the VP44 and ECM.

Ground on the left (black/tan) and alternator charge on the right (black) then the crush crimp of ground wires under the black tubing on the black/tan wire.

Edited 8 hours ago8 hr by Mopar1973Man

Thank you. I just waiting for a fuse housing to be delivered and I will be done with this mod. I wasn’t able to find a 140 amp setup so I went with 150. Will this be a problem?

No. Just make sure to carry extra fuses. Not just one either.

I opted for the resettable circuit breaker and easy to just toggle the reset arm.

1 hour ago, Mopar1973Man said:

No. Just make sure to carry extra fuses. Not just one either.

I opted for the resettable circuit breaker and easy to just toggle the reset arm.

Have you had the breaker trip? It must be a pretty rare event, being the fusible link in my PDC has never been replaced

Yes. About 10 to 20 times. Typically, bad load to engine speed issues. Like idling with the grid heaters banging away at the batteries. Weak batteries will make the breaker pop.