Two glowplug relays?
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Freshman User
Joined: Mar 2004
Posts: 48
Likes: 0
From: Silver Lake, IN
Two glowplug relays?
I am having trouble with cold start up so I replaced the glowplug relay for starters. Before changing this I notice what looked like another relay. I changed the one nearest the firewall. My question is: Is this another glow plug relay? If it is, what`s the part number? As it is a little different than the other. Thanks, Vinman 
Almost forgot, this is a 2000 PSD.
Almost forgot, this is a 2000 PSD.
Last edited by vinman46; Dec 7, 2004 at 07:17 PM. Reason: omitted truck info
Senior User
Joined: Dec 2003
Posts: 266
Likes: 0
From: Albuquerque NM
The relay next to the passenger side battery is the starter relay and there are two other relays next to the water separator which one of them is your GPR and the other is the cold air element relay. Which one did you change?
Post Fiend
Joined: Jan 2000
Posts: 5,330
Likes: 17
From: Dryden, ON, Canada
The shorter one closest to the firewall is the GPR. The taller one to the front of the truck is the intake air heater relay. It won't help with cold starts, only with smoke at idle when the engine is cold.
Elder User
Joined: Jan 2004
Posts: 803
Likes: 0
From: Bobcaygeon Ont.
Glowplugs aren't that bad. Did mine a couple of months ago. The hardest part i found was getting the one rocker cover bolt under the a/c box out. Did it through the fender well. Took me about 4 hrs. Good luck! 
P.S That was the whole job not just the bolt 
P.S That was the whole job not just the bolt
New User
Joined: Dec 2004
Posts: 8
Likes: 0
Vinman--You can check your glowplugs without pulling valve covers by carefully taking apart the wire harness mounted to the top of the valve covers, the glowplug pins are the two on each outside of the harness-then take your test light-hook it up to the positive terminal on your battery and touch one of the pins-Lights up its good-Doesn't light up its bad saves replacing all of them if any.. Good Luck
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Postmaster
Joined: Dec 2003
Posts: 2,864
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From: STEPHENVILLE,TX!!!!!
if you gotta pull the valve covers may as well change them all, murpheys law you'll change three in one head and the 4th will die next week. ya do them all then you wont have to worry bout them for a long time. its really not that tough at all, them you can double check wiring harness to make sure its in good shape also
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