GPCM LED MOD on the dash question
Thread Starter
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Posting Guru
Joined: Aug 2005
Posts: 1,768
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From: Central Alabama
GPCM LED MOD on the dash question
I have this on my 2002 7.3, where the LED lights up when the GPR is on and the LED goes out when the GPR shuts off. I need to know which wire to tap on my wife's 2004 EX 6.0. It has two plugs going to the GPCM, I need to know which wire on which plug. Thanks.
Thread Starter
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Posting Guru
Joined: Aug 2005
Posts: 1,768
Likes: 1
From: Central Alabama
No one has done this MOD, I'm suprised? It's only $2 for the LED. I've had it on my 7.3 truck for years, if you wait until the light goes out you have an extra 1-1.5 VDC to crank the truck. Plus its an easy way to make sure your GPCM is working correctly.
I'm just guessing here, but will I have to tap all 8 leads going to the glow plugs. If so does any one have a pin-out to both plugs on the GPCM?
I'm just guessing here, but will I have to tap all 8 leads going to the glow plugs. If so does any one have a pin-out to both plugs on the GPCM?
Lead Driver
Joined: Nov 2007
Posts: 5,139
Likes: 209
You don't need to tap all 8, just 1 will do. They are easy to trace from the GPCM to the plugs themselves, and then you just pick one. I watch my voltmeter and can see when the GP's turn off, which is a minute or so after I've started the truck.
Posting Guru
Joined: Feb 2009
Posts: 1,170
Likes: 1
From: Moyock, NC
Same here...just watch my Mod Volts PID on my Insight gauge...I start up after the GPMC instrument cluster coil lamp goes out, but I don't turn on headlamps, AC, radio...etc...until I see my Volts somewhere in the mid 13v range.
