Manual glow plug switch
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Logistics Pro
Joined: Apr 2011
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From: Earth
Manual glow plug switch
Ok been pondering if I should do this or not and if so how should I hook it up, anyways been considering a glow plug "heat hold" switch (momentary type switch to heat the plugs) anyways should I install one or is this like the snake oil products out there, just a gimmick of some type?
Fleet Mechanic
Joined: Nov 2009
Posts: 1,381
Likes: 193
From: Cambs, England
My understanding is that they stay on for up to 2 minutes, long after the wts lamp has gone out, shirley if the engine doesn't start there is another issue. I'd just go with a glow plug led mod if I felt the need.
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Logistics Pro
Joined: Apr 2011
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From: Earth
Well as I stated should I? (I'm most likely not going to due to having to run wires) I'm thinking no but the idea could be worth it but looking at the kits it just seems like a sham perhaps
Logistics Pro
Joined: Aug 2009
Posts: 3,609
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From: Arizona
I agree the LED mod is great, you always know when they are on and you can use the key to cycle them again if you feel the need. I like to know exactly what is going on right now, I wouldn't be without my LED mod and FP gauge. Torque Pro for the rest.
i ain't rite
Joined: Mar 2005
Posts: 65,449
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From: Marlboro Mental Hospital.
since the glow plugs stay on for up to two minutes if the glow plugs are working properly, doing a manual switch is a downgrade.
the manual switch is an upgrade for the old pre 87 system that failed in the on position burning out the glow plugs. otherwise the solid state controller used after 1987 is best left alone because it just works the way it should.
the manual switch is an upgrade for the old pre 87 system that failed in the on position burning out the glow plugs. otherwise the solid state controller used after 1987 is best left alone because it just works the way it should.
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,345
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From: Lake Hartwell, GA
In my opinion you should not install a manual switch, but you should install an LED to see when they are energized and when they are not. I will be doing this soon as well.
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Post Fiend
Joined: Feb 2008
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From: Lancaster, Pa.
Just do a search to look up that mod. A garage owner here, nice fella named Dan Kwikkordead did a push button manual glow plugbypass without any problems and it can be done. I'm doing one shortly here after I read up exactly how its done. The led mod is a great start to find out whats working and whats not though, got one myself.
Last edited by big poppa; Nov 13, 2016 at 02:53 PM. Reason: Added more
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Hotshot
Joined: Mar 2014
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From: Douglassville, PA
I believe that the way the GPR works is that is has power at all times and that the PCM provides ground to activate it when GPs are called for. If that is the case all you need to do is connect that momentary switch to that ground lug on the GPR and ground it out the other side. The need for a manual switch indicates some other problem though as with all functioning as it should that manual switch should not be necessary.
Post Fiend
Joined: Mar 2007
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From: Texas
Technically it could be useful if you have a weak battery condition and aren't sure how to gauge when your GPR clicks off by the lights or a meter. But unless you're talking about a screwdriver across the two large posts of the GPR because the relay has failed, then I agree a manual switch doesn't seem to offer much benefit.
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Logistics Pro
Joined: Apr 2011
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From: Earth
ok i kind of figured it was a snake oil type thing anyways, I have already done the LED mod for the GPR, should be in my build thread. Just wanted to ask about the thoughts of the collective brotherhood on this...I guess I got PMS...
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