RockyMtDan
New member
Your next step would be to isolate each glow plug by removing the bar or wires that conects them. You can use your test light as a cotinuity tester by hooking the ground clamp to the (+) post of the battery and touch the prob end to the top post of each glow plug; if it lights up it is most likely good. BUT on rare ocations a glow plug will burn out and short to ground. When this happens it usualy burns out the coil indicator. I hope I didn't confuse you.Dan