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Justo102
24th October 2014, 09:45 PM
Hi guys I have a gq patrol with an rd28t and was wondering how do I test the back 3 glow plugs I did the front 3 with a test light but the back 3 don't light up even after I bought 3 new one thinking that they were buggered
Yendor
25th October 2014, 10:23 AM
The back 3 glow plugs don't have a circuit to the body of the glow plug. You need to check the resistance between the two connections on the glow plug.
Justo102
25th October 2014, 05:40 PM
The back 3 glow plugs don't have a circuit to the body of the glow plug. You need to check the resistance between the two connections on the glow plug.

Thanks mate looks like I blew $180 on plugs lol
Justo102
25th October 2014, 06:09 PM
Would any one have a picture or diagram of the replay
Yendor
25th October 2014, 09:27 PM
It's normally the second glow plug relay that fails. The one with five wires.

The GQ 2.8 glow plugs have a first stage and a second stage.

If you connect a voltmeter to the long busbar you should see the following reading

Stage one : Around 12 volts

Stage two : Around 6 volts.

Voltmeter connected to the short busbar

Stage one: Around 0 volts

Stage two : Around 12 volts