Any idea what to look for here? This engine (a Willaims diesel) has been packed away for over a year and was operating fine before. I just tried it out on my test track and nothing. Headlight comes on but it won't move. I tried to re program it but it appears to be completely dead. No blinking light during the 'SET' phase.
Says 'Cruise Commander U3.0'
I held it off from the chassis and don't see any loose plugs and everything seems tight. Help...
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I am looking at the pictures you have posted, I am not sure if the the wiring is the same as the CC 4.1 I just installed. the Cruise Commander 4.1 has four wires connected to the green post on the right side of lower photo. Two from motor brushes and two from track power. Do you have wiring diagram for this board?
Ray
Thanks for the reply Ray but No, I don't have the paperwork. As I mentioned above, this unit has performed fine the whole time I've had it until being packed away...
You might try contacting Jon or Ken at ERR, they might have some info to help, I've had excellent service from them any time I needed help, good guys.
Ray
Sam, you can go to the the ERR website and download the manual for the Cruise Commander. Ray's theory is a good one. The 4 wires that go to the 4 terminal green connector look a bit suspect. If you have an ohmmeter check from the screw terminals to the motor terminals. Blue and yellow should go to the motor.
Pete
I see all sorts of things wrong in those pictures.
Yes, there should be 4 wires connected to the green post next to the bridge rectifier.
The yellow and blue wires go to the motors.
The black wire should go to the outer rails.
The missing red wire goes to the center rail.
Also, the antenna is plugged into the wrong spot. It looks like the antenna wire is plugged into the coupler connector. That wont work at all.
You also have no lights connected to the board with means no directional lighting. You said your lights work so therefore the lights are connected directly to track power, not the ERR board.
Does the red wire have a partial lead coming out of the shrink wrap? It may have come out of the empty spot next to the black wire. G
Well, all four of those connections MUST be connected for this thing to go, so that's where the wiring issue resides. 
I do not see the outside rail ground wire in the 4 wire connector. You antenna wire appears to be connected to the vertical pin next to the 6 screws so that should be ok. I suspect the lack of chasis ground is your problem.
He's missing the 3rd rail (hot) connection. Here's the pinout of the Cruise Commander, check the Power block.
Once you get this fixed, we will tackle the Allegheny. G
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