72 Demon now underway

We are kinda nuts around here about Mopar electrical. Probably because for all of Ma Mopar's great engineering, it was probably the least well engineered system on the vehicles, particularly when we are looking at it 50 years after the fact. Actually, its more than 50 years after the fact because the Packard 56 spade terminal had been around 16 years when the 1972's were built.

Anyway we wired the Demon from scratch with 2 exceptions:
1. New M&H-Year One rear lighting harness
2. Retained front turn signal/marker light and horn wiring from original forward harness Both done because of the connectors and sockets for the respective bulbs. Everything else is new wire and layout.

The ISIS Multiplex Electrical platform has 3 modules that communicate over a bus to supply all switching functions. One module, the Mastercell receives all the switch inputs. It in turn sends commands to power loads on/off to two Powercells, one for forward circuits, one for rear. We mounted the Mastercell and Forward Powercell side by side on a custom bracket in the glove compartment opening. Being our second install of one of these systems in a Mopar, we had some lessons learned and ideas to try out on this one. The rear Powercell is mounted on a "wing" panel hung off existing holes in the the wheel well and rear quarter supports. This is a busy area because it also has the fuses for the two 60 amp feeds to each Powercell, and the battery isolation 300 amp relay.

Another "upgrade" that wiring from scratch allows you to incorporate is consistent use of Delphi Weatherpack connectors. There are many, many good options for connectors from AMP, Deutsch, and other Delphi MetriPack lines, but Weatherpack is inexpensive and easy to terminate. They look good, perform 100 times better than Packard 56, and while positive locking, can be disconnected with one hand. If you look close at the engine harness, wiper motor, and MSD box you will see them.