K-line Milw F7 AA, K-25432 not working

First, I would determine what cause excessive current draw. Then I would replace the motor driver board (the one pictured)  with a Cruise M or a Cruise Commander.

Was that from eBay with a missing B unit?

Yes it was, it's unfortunate that the seller neglected to mention that it didn't run in his listing. I suppose that's the risk you take buying on eBay. I've been looking for a Milw Rd FP7 for a very long time so I took the chance on this one. It didn't work out well.

I was thinking the same about the cruise M as a replacement. I'm going to try the resistor replacement first and see how that goes. I think I found the cause of the short, on the umbilical there were 2 wires that had been wrapped with tape, the insulation on both wires appeared to have melted, possibly from the wires chaffing on the frame and making contact with the frame. I'm still looking at all the other wires and boards to see if there is any other areas that might be a problem. I plan to test all wires for continuity before I reassemble and check for any other chaffing.  I'm hoping the mother board has not been damaged. if it is, this may become a very expensive purchase!

Norm