OK, I've started the process of cleaning up the wiring on my 1964 W500 Power Wagon Fire Truck. I've used MoparNorm's wiring schematics and have figured out the dash connectors, including the Accessory connector.

W500%20Cab%20Wire%20Connectors%20w-Table.gif

There was apparently a low oil pressure shut off setup on the truck at one time, but the dash side connections have been cut/removed. I've got an extra relay under the starter relay, that looks to have been part of it, but I'm not 100% positive. In the following picture you can see the relay, what do you think? It appears to only energized during the cranking process.

DSC08617_W500_StarterRelay.JPG

I've got a lot of engine and some dash side wires to replace and cleanup. I've found a few in-line fuses, and a circuit breaker, along with a glass fuse buss on the engine side firewall. I'll add a main line fuse, and few others. Anyone with suggestions or recommendations?

DSC08605_W500_DashConnectors.JPG

Oh, the one thing I know I need to do is get rid of the Amp Gauge. The Fire Company had already replaced the stock 10ga main wire with what looks to be a 6-8ga wire, but still running through the Amp Gauge. I'll do the Amp Gauge Elimination and install a Volt Gauge as part of the job. However with the stock Amp and Fuel gauges being a combined gauge, that will mean replacing the Fuel Level Gauge as well. Anyone know the Full/Empty ohm range of the stock gauge, or have a recommended replacement? My dash is the 6 round gauge with Tach.

DSC08622_W500_ClusterWiring.JPG

Thanks!
Will
My Dodge Power Wagons