Good thinking in the last post and probably very accurate in your case.


Another reason for not using a wire as a as a temporary fuse is you might flow more current through the glow plug relays contacts than they can tollerate. The weakest link in the glow plug circuit is going to suffer the most stress.

A dead shorted glow plug. That is one showing zero resistance is a not unknown cause as well as a feeder wire to a glow plug being shorted out somewhere. Keep this in mind for future issues if any.