I had an Allmand night light pro that needed a new control box and wiring harness. The old control box was having problems because the glow plug switch wasn't working properly. The plastic fatigued and work hardened to the point where it wouldn't let the switch move freely. To prove it I cut out the plastic covering the push button switch and it worked fine. I was given the parts and proceeded to rewire the unit. After I was finished the unit would start, but the motor would cut off after 5 seconds. It would do this two more times before throwing a failure to crank code.
After troubleshooting all the safety switches (coolant temp sensor, oil pressure sensor, starting/charging system), as well as testing the alternator. There was no alternator output under load when I was troubleshooting this problem. One thing I tried was going into the computer parameters and turning off the safety parameters for generator input but that didn't work.
I put on the old wiring harness and control box and the unit ran fine. I called manufacturer and asked if there was a wiring harness or control box update. I explained the failure to crank code and the rep told me that the control box wasn't seeing generator input so it was shutting itself down as a safety switch. In the provided harness there was supposed to be something for pins 8 and 9 that provided generator input and a ground for the control box. For whatever reason the part numbers were all correct but there were still wires missing for the control harness.
What I ended up doing was making my own ground for the control box pin and also creating my own wire for the generator input. I ran it from the pin on the control box through the frame and onto the breaker switch and not after the GFCI. If I had ran the wire so it was after the GFCI in the circuit then whenever someone tripped it the motor would shut off. That would certainly turn into a service call for a no start.
40hr
40hr
 |
| Breaker switch with wire I made for generator input. |
 |
| Old control box that did not require generator input. |
 |
| Allmand Night Light Pro is tow-able with four halogen service lights. |
 |
| You can see the white wire I ran through the frame. Put a grommet in there so the wire didn't rub which could lead to a short to ground. |
 |
| New control box with the hour it was changed at. |
 |
| New control box. We've only used these on compressors until now. |
 |
| Marathon generator. |
