Hello, new member and new M923A2 owner here, looking for a little specific help on my truck. I have a wire that is cut and zip tied to the heater hose by my alternator. The label on the wire shows 568, which I found the info on that by searching here, and reading the TM's. It should be the field excitation wire, but my alternator is working fine per the gauge and meters. What I think happened is I have 566 and 568 switched somewhere, so the ignition switch is exciting my field but I don't have overcrank protection, which is what 566 is for. I'm thinking this is working because both wires just want to see voltage, and both of these should be interchangeable in that regard. This is just my theory, I hope someone can tell me if that's true, too. The starter will over run, but my alternator is making voltage. To me that means that the alternator side of 568 is seeing voltage, 566 is not.
The problem I'm looking for help with is identifying where the non-alternator end of 568 is on the actual truck. I've seen it referred to as going to the "brain box" on the drivers side of the firewall, but if someone could direct me to the exact terminal or show me where both are supposed to be routed, maybe I can find the real 568 and 566 and get them sorted. I couldn't find the wiring diagram for 568, but I saw the one for 566 and a generic schematic won't help me as much as someone that knows right where the wires should be so I can focus my search.
Other than that, thanks in advance for the help, I'm loving the truck so far.
The problem I'm looking for help with is identifying where the non-alternator end of 568 is on the actual truck. I've seen it referred to as going to the "brain box" on the drivers side of the firewall, but if someone could direct me to the exact terminal or show me where both are supposed to be routed, maybe I can find the real 568 and 566 and get them sorted. I couldn't find the wiring diagram for 568, but I saw the one for 566 and a generic schematic won't help me as much as someone that knows right where the wires should be so I can focus my search.
Other than that, thanks in advance for the help, I'm loving the truck so far.