captain720
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Wow these things really really cook, that was after about 8 seconds and you could feel the heat from a ways away.
Open circuit would be infinite ohms, which is the opposite of zero ohms. It might show zero on an open circuit, but it's actually infinite (depending on the meter).What is important is there is continuity and not zero ohms. Zero ohms is an OPEN circuit and that is NOT GOOD!
DEFINITELY!One other thing with meters, is you do get what you pay for.
Same here except for the stored in the house part.I have a Fluke that I use and am VERY protective of (is stored in the house, in a cabinet and NO ONE is allowed to touch it ()). It will read a glow plug.... the $20 meters from Harbor Freight... not so much.....
I'm not a big fan of the test light method. All it will tell you is whether it's burned out or not. It won't tell you if a glow plug is out of spec and about to burn out. A test light is fine for a quick check, but I won't use one when I want to know if a glow plug needs to be replaced soon., they pass the test light test fine
I think I know @Reggie f250 but please clarify how you do it with the Vicegrips and the battery. ThanksI had some glow plug problems. Tested with a test light and they showed good. But a few starts later they were dead. I tested them again with a Vicegrip across the battery terminals. It's easy to see which ones work.