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Old Nov 19, 2015 | 11:04 AM
  #1  
AndysFords's Avatar
AndysFords
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From: Fitzpatrick Alabama
Glowplugs

Cooler weather has arrived and my 2000 f250 won't start. Wait to start light is coming on, no power passing through the two relays on top of the engine. Are both of these for glowplugs? My 97 only had one. How do I diagnose relays on this truck? If you cross out the two relays truck fires right off so I know the glowplugs themselves are good.
 
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Old Nov 19, 2015 | 11:12 AM
  #2  
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The one closest to the turbo should be the GPR. The other one is for the air intake heater (AIH).
 
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Old Nov 19, 2015 | 12:22 PM
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jhl3
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If you have to replace the relay, search the forums for Stancor relay. It is a good upgrade.

Here is an additional link: http://www.guzzle7pt3.com/s_gpr.php
 
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Old Nov 19, 2015 | 01:39 PM
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I'll echo what JLH3 posted above. Go with a stancor. Very sturdy unit comparatively.


Your AIH doesn't react the same way as your GP relay. Plenty of threads in here to search on that so I won't whip a dead horse.


BTW, when was the last time your GP's were replaced regardless of todays performance.


If it's been 5 years, think of replacing them regardless. Think of it as a tuneup on a gasser. Cheap insurance and maintenance minded, a very inexpensive opportunity to avoid pulling a head if they decide to balloon on you.


Remember, every thing in Texas is big!


Denny
 
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Old Nov 19, 2015 | 03:05 PM
  #5  
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AndysFords
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From: Fitzpatrick Alabama
The glowplugs were replaced two years ago. I bought a new relay and power isn't coming out of it either.
 
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Old Nov 19, 2015 | 03:14 PM
  #6  
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AndysFords
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Laughing Gas
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From: Fitzpatrick Alabama
I have key on power going to both small terminals on my relay, I don't think that is right is it?
 
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Old Nov 20, 2015 | 09:14 AM
  #7  
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From: Fitzpatrick Alabama
Replaced the relay and still nothing, anybody have any ideas?
 
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Old Nov 20, 2015 | 09:27 AM
  #8  
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Did you look at the link that jhL gave you to Guzzle's website? That pretty much tells you everything you need to know on the relay. If you got it to fire up by jumping the lug on it before, it can't be the harness or UVCH, so maybe you got a bad relay from the auto parts store.
 
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