Glow plug LED worth it?
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stinson 108-1
Joined: Jan 2012
Posts: 1,015
Likes: 8
From: south jersey
Glow plug LED worth it?
In the spring I installed an LED for the glow plug relay because it seemed like a easy kinda cheap fun mod to do. Well, just last week I noticed the LED would just flicker for an instant and not stay on. I thought, thats not right. Either the relay is on, or its not. So I popped the hood and checked the relay, and it was intermitant. I would not have known till it was cold out if not for that 5.00 mod. I replaced it with a gpr 109. Interestingly the one I took out was replaced about 6yrs ago and was also a gpr 109, which on the bottom said made in the USA. The new one says chinee. I think I'll get a spare to keep with my growing inventory of "spares".
Postmaster
Joined: Jan 2009
Posts: 2,667
Likes: 1
From: Glen Rose,Texas
X2....You will always know when it is working and for how long.Just choose your color.
Try one of these.
http://www.guzzle7pt3.com/s_gpr.php
Try one of these.
http://www.guzzle7pt3.com/s_gpr.php
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
I think it's a great idea with very little if any undesirable side effects. Makes me wonder why I haven't installed one yet in any of my trucks.....(make note to self to update the SD TO DO list....)
I've been thinking about going one step further and taking control away from the PCM and installing a push button in the cab. That way I can use it when (if ever) the need arises. The only time I really need the GPs is during the mild winters or when I am at high elevations. I figure a 20-30 second burst should be more than enough to get the engine to light.
For me the benefit would be possible longer battery life (only getting 24 months per pair right now...) and would be nice not to have the GPs fire every time I turn on the key to connect up AE or when priming with oil after HPOP or injector work etc...
I have the switch installed already....just need to get off my butt and run some wires.
I've been thinking about going one step further and taking control away from the PCM and installing a push button in the cab. That way I can use it when (if ever) the need arises. The only time I really need the GPs is during the mild winters or when I am at high elevations. I figure a 20-30 second burst should be more than enough to get the engine to light.
For me the benefit would be possible longer battery life (only getting 24 months per pair right now...) and would be nice not to have the GPs fire every time I turn on the key to connect up AE or when priming with oil after HPOP or injector work etc...
I have the switch installed already....just need to get off my butt and run some wires.
Last edited by Shake-N-Bake; Sep 6, 2012 at 02:31 PM. Reason: spelling
Senior User
Joined: Mar 2012
Posts: 492
Likes: 0
From: Jenkintown, PA
I've been through a few GPR's in my 97 E350, and the first indication of trouble was always a long crank and cloud of white smoke on a cold morning. An LED in definitely going in the new truck.
Chris
Chris
Cargo Master
Joined: Oct 2007
Posts: 2,712
Likes: 107
From: BoCoMo
In the spring I installed an LED for the glow plug relay because it seemed like a easy kinda cheap fun mod to do. Well, just last week I noticed the LED would just flicker for an instant and not stay on. I thought, thats not right. Either the relay is on, or its not. So I popped the hood and checked the relay, and it was intermitant. I would not have known till it was cold out if not for that 5.00 mod. I replaced it with a gpr 109. Interestingly the one I took out was replaced about 6yrs ago and was also a gpr 109, which on the bottom said made in the USA. The new one says chinee. I think I'll get a spare to keep with my growing inventory of "spares".
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Posting Guru
Joined: Apr 2010
Posts: 1,112
Likes: 0
From: South Shore, MA
I think it's a great idea and I would've done the LED, but with my Aeroforce scan gauge I can watch actual voltage and see when the GPR is energized. It's a huge difference in voltage; ON vs OFF.
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9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
Its an LED wired to the GPR to show when it is actually on, as the Wait To Start light doesnt actually show when it is on.
Elder User
Joined: Jul 2012
Posts: 947
Likes: 0
From: Glen Rose, Texas
So do they come on after the WTS light goes off, or what? Is there a write up anywhere on how to do this?
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
Heres a write up.
https://www.ford-trucks.com/forums/7...wmriceman.html