[Vwdiesel] Glow plugs
r.c.brown at ieee.org
Sun Jan 18 14:47:16 EST 2004
Dan Stock wrote:
> I already checked the glow plugs with my multimeter
> and they are burnt out (all of them). I have 4 used
> ones that test good but just want to find out what
> burnt them out before hooking up the new ones. Is 45
> to 50 seconds to long for them? If so, is it the
> relay that controls how long the plugs get voltage?
On-time will vary with engine/coolant temperature and whether its a fast of slow glow relay. Glow plugs do wear out with use. Off-brands seem to burn out faster than a good brand like Bosch. The glow plug relay does all the logic of turning the plugs
on, turning off the pre-glow LED, turning them off and in some applications, turning them on while the starter is cranking. I have more information on testing the various compoents on the web page I posted earlier.
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