Quote:
Originally Posted by superapan
I'm sorry if I'm a bit dense. Electric stuff to me is like magic. Using the voltmeter I measure according to Diesel911's picture below - on the squiggly connectors on each side of respective glow plug. But are you saying 12 volts will distinguish a burnt out glow plug while NOT glowing? I'm not entirely positive, but I don't think it normally has any voltage over it unless I flip the switch? Or is that how they always work?
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The last glow plug is attached to the engine block. The first to a wire coming from the fender. Follow the wire from the fender to the first glow plug should have 12 volts before and after the GP. go to the second, should have 12 v before and after the GP. etc. Now, you will need an assistant to pull on the glow plug knob because 12 volts is only applied while the knob is pulled (IF auto preglow system, pre glow is only on for a few seconds (up to 30 for old style) so 12 volts will only be applied during that time period.
AFA electricity's magic, imagine you're in a car called 12 volts. Starting point is the positive battery cable. On the road to Ground (your final destination) there are 5 traffic lights ahead. A green light is a good GP a red light would be a bad GP. the 12 volts stops at the bad glow plug because it can't complete the journey to ground.