Glow plug control switch
Hotshot
Joined: Jan 2008
Posts: 13,144
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From: Rochdale MA
You can get the LED from radio shack for cheap a couple of dollars. Make sure you get a 12V LED. I just did mine when I put my guages in.
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Joined: Feb 2003
Posts: 887
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From: MN
The PCM always needs to have a source of voltage to keep its volatile RAM (Random Access Memory) alive and well. So in a way, the PCM is at least partially on as long as the battery is connected. If the PCM is the source of ground in a circuit such as our GPR, there will be voltage available through that connection and will energize that part of the PCM as well. As long as the semi-conductor switching devices are powered, they will make the yes/no, 1/0 decisions that they are designed to depending upon the inputs they receive.
The biggest benefit of the switch setup is I can have my glow plugs run their 2 min cycle when it is cold out (below zero) as I use my keys to operate lock on my cap/topper, toolboxes, buildings, etc.
deere, I grew up not all that far from you in Grafton, been through Hartford many a time.
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Postmaster
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From: horicon Wi
Yeah I know where you are talking about. My dad has family around that area.
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From: horicon Wi
Elder User
Joined: Jun 2008
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From: Iowa
or if your dad won't let you do the manual control switch.... do what I do... in cold weather go through a couple glow plug cycles before you try to start it..... simple, turn the key on, wait for it to time out, turn key off, turn key on again..... wait for the led to drop, then start.
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Postmaster
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From: horicon Wi
or if your dad won't let you do the manual control switch.... do what I do... in cold weather go through a couple glow plug cycles before you try to start it..... simple, turn the key on, wait for it to time out, turn key off, turn key on again..... wait for the led to drop, then start.
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Hotshot
Joined: Jan 2002
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From: La La Land
Use a three position rotary switch.
Remove the wire from the GPR's low side and stow temporarily.
Common of the switch goes to the low side of the GPR where the wire above used to be.
First position goes nowhere.
Second goes to ground (preferably also through a momentary-contact, normally-open push button switch, one that you have to physically hold in to activate).
Third goes to wire previously removed from the GPR.
That second position is going to be a battery-killer unless you also use that push-button.
Remove the wire from the GPR's low side and stow temporarily.
Common of the switch goes to the low side of the GPR where the wire above used to be.
First position goes nowhere.
Second goes to ground (preferably also through a momentary-contact, normally-open push button switch, one that you have to physically hold in to activate).
Third goes to wire previously removed from the GPR.
That second position is going to be a battery-killer unless you also use that push-button.
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Postmaster
Joined: May 2008
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From: horicon Wi
Use a three position rotary switch.
Remove the wire from the GPR's low side and stow temporarily.
Common of the switch goes to the low side of the GPR where the wire above used to be.
First position goes nowhere.
Second goes to ground (preferably also through a momentary-contact, normally-open push button switch, one that you have to physically hold in to activate).
Third goes to wire previously removed from the GPR.
That second position is going to be a battery-killer unless you also use that push-button.
Remove the wire from the GPR's low side and stow temporarily.
Common of the switch goes to the low side of the GPR where the wire above used to be.
First position goes nowhere.
Second goes to ground (preferably also through a momentary-contact, normally-open push button switch, one that you have to physically hold in to activate).
Third goes to wire previously removed from the GPR.
That second position is going to be a battery-killer unless you also use that push-button.
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Joined: Jul 2006
Posts: 1,515
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From: Jonestown PA
You don't have to cycle the glow plugs by turning the key on and off a few time. Just turn on key wait for the light on dash to go out, then wait a minite more. The glow plugs stay on for 2 minites or so after you turn the key on. If you have the LED mod then you should know how long they stay on.
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