GPR relay and PCM help - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 01-11-2008, 03:46 AM Thread Starter
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GPR relay and PCM help

I checked my GPR and plugs and both are fine so it looks as if my PCM is not telling my relay to open. Where do I find the PCM and where do I go from here to get the PCM to get the relay to open? thanks Chad

PS. The OBS doesn't have 9 pins to check glow plugs so which pins do you use? They have maybe 5-6. Thanks Chad

1997 crew cab 7.3
Auto, 4x4, 3.55 rear
3"to 4" exhaust
Afe II with proguard 7
TS 6 position
Quad Commander gauges
FPR shimmed
Modified IDM
TQ upgrade with BTS valvebody
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post #2 of 4 Old 01-11-2008, 04:01 AM
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How did you test out the relay? Here is a writeup that explains the glow plug test on pre 99's also.7.3 glow plug system diagnosis

2002 F-250 4x4 EC, SRW, SB
Auto 93,000 miles
DP Tuner F5
ATS Compressor and 1.0 Exhaust housing high flow back plate
Turbo Back 4" Silverline Exhaust Mbrp Muffler Delete
Isspro Trans,Pyro,Boost Triple Pod
Fumoto Oil Drain Valve
AIH Delete With Boost Fitting

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post #3 of 4 Old 01-11-2008, 04:57 AM Thread Starter
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Vitalidle, I check the old one with a meter and got nothing when the switch was on so I replaced it with a new GPR109 from Napa. After getting it on I tested with a meter and still didn't get anything. I did figure it out it was with the GPR 109 the mounting holes are turned 180* so I had the wires backwards and now it opens and closes after 30-60 seconds like it should. The truck calles for a GPR110 ($89) Napa has the same relay just different mounting holes GPR 109 ($28) so I went for $28. Thanks for the help. Chad

1997 crew cab 7.3
Auto, 4x4, 3.55 rear
3"to 4" exhaust
Afe II with proguard 7
TS 6 position
Quad Commander gauges
FPR shimmed
Modified IDM
TQ upgrade with BTS valvebody
Chad T is offline  
post #4 of 4 Old 01-11-2008, 12:26 PM
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Good deal! Glad to hear your up and running

2002 F-250 4x4 EC, SRW, SB
Auto 93,000 miles
DP Tuner F5
ATS Compressor and 1.0 Exhaust housing high flow back plate
Turbo Back 4" Silverline Exhaust Mbrp Muffler Delete
Isspro Trans,Pyro,Boost Triple Pod
Fumoto Oil Drain Valve
AIH Delete With Boost Fitting

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