Re: 1937 120C Current Draw

Posted by R Howe On 2023/12/26 13:45:43

Thanks, Howard. Which coil (relay) are you referring to as the cutout relay? Is it the top one where the bat and gen wires attach across from each other, as shown in the Upper Coil picture, or the lower one where the fld wire attaches, the lower coil? If it is the one on top, as you see that one is closed when there is no current applied to it and the lower one is open when there is no current. This is a VRR-4005A voltage regulator which I was told was compatible with my '37 120C. The parts book says that we need part number 316500, VRD-4005A, which I have not been able to find anywhere. I've also read that the VRD-4001A is compatible, but there is no place in the parts book that says that. When looking at the wiring schematic for the VRR-4005A, it shows the bat line attaching to the left terminal (Upper Coil pic) but when I do and the regulator is installed on the body as required, I get the current draw without anything other wiring being attached. I know I'm missing something here but have yet to figure out what.
Thanks again for all of your expertise and help.




Attach file:

---

  VRR-4005A Lower Coil.jpg (173.18 KB)