Desperate Van owner needs expertise

[DPG]

But you are looking for a low resistance. This to me points to some other fault pulling the resistance down. Resistors don't normally fail by going low, they usually go high resistance. Not always obviously.

 

[IslandK]

But you are looking for a low resistance. This to me points to some other fault pulling the resistance down. Resistors don't normally fail by going low, they usually go high resistance. Not always obviously.

A systematic check of components does seem the sensible start point from what you say. Thanks for the insight.