Glow plug testing question

BreckenridgeCruiser · 11-07-07, 03:07 PM

I am a newbie to testing electrical systems and had a question about testing glow plug health.

I tested the voltage at the front cylinder glow plug and got a 20.5V reading for a second or two and then it dropped to around 10v. it sat there until the relay shut down the glow (around 10-15 seconds).

I read in the FSM that you also need to test the Amps getting to that plug. I have a cheap combination meter from Sears that has mulitple settings of what you want to read, V, Ohm, and Amps in different ranges. I have to admit I barely know how to use it properly.

What setting should I use and how should I place the sensors to get the right reading?

Where can I get a good set of not too expensive glow plugs?

Thanks

MattF · 11-07-07, 04:30 PM

To test current, you need to break the circuit and connect the meter inline to again complete the circuit, with the meter range selector on whichever Amp range you want to measure.

There's a Toyota guide on testing glowplugs here:

http://forums.bauchan.org/portal/vie...ds.php?dcid=14

11-07-07, 03:07 PM	#1
BreckenridgeCruiser IH8MUD Regular Join Date: Aug 2006 Location: Breckenridge, Colorado Posts: 383	Glow plug testing question I am a newbie to testing electrical systems and had a question about testing glow plug health. I tested the voltage at the front cylinder glow plug and got a 20.5V reading for a second or two and then it dropped to around 10v. it sat there until the relay shut down the glow (around 10-15 seconds). I read in the FSM that you also need to test the Amps getting to that plug. I have a cheap combination meter from Sears that has mulitple settings of what you want to read, V, Ohm, and Amps in different ranges. I have to admit I barely know how to use it properly. What setting should I use and how should I place the sensors to get the right reading? Where can I get a good set of not too expensive glow plugs? Thanks __________________ 1981 JDM BJ44 RHD - Going under the knife soon!

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11-07-07, 04:30 PM	#2
MattF IH8MUD Junior Join Date: Oct 2007 Location: South Yorkshire, England Posts: 137	To test current, you need to break the circuit and connect the meter inline to again complete the circuit, with the meter range selector on whichever Amp range you want to measure. There's a Toyota guide on testing glowplugs here: http://forums.bauchan.org/portal/vie...ds.php?dcid=14