Well a ground wire is not the answer. I have a spare glow plug indicator or should say had. I attached a hot wire to one side and ground to the other, vaporized the resistance wire instantly. Just need to make another resistance to replace the one I just fried. Still need to check the L175 to see how it's set up. My wiring diagram for the 175 looks just like the one for the 245. Back to step one....how does this really work??? ric