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1994.5 - 1997 7.3L Power Stroke Diesel  

Sry, another GP question

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Old Oct 23, 2011 | 06:37 PM
  #1  
King7765's Avatar
King7765
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Sry, another GP question

Read through the glow plug thread... THEN... got bored and tested all my glow plugs and the relay

Pass side: All around 1.2 ohms
Drivers side: 3 around 0.5 ohms BUT one was between 88 ohms and 138 ohms. I couldn't get a good solid reading from it.

So I'm assuming that one is bad???

The relay was tested also, with a cold engine. With the "key on" the battery side was reading 11.18 volts and the GP side was reading 10.22 volts.

So according to the GP bible...... I should replace the relay also?

So much info, so many opinions. Please help.
 
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Old Oct 23, 2011 | 07:28 PM
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From: Cato Arkansas
Replace glow plug and how long was the key on before gp relay test it shuts off after a min
 
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Old Oct 23, 2011 | 07:47 PM
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I turned the key and quickly grabbed the meter to test it. The engine was cold so it was on for a while.
 
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Old Oct 23, 2011 | 08:04 PM
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arkredneck
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From: Cato Arkansas
If it wasn't working at all I'd imagine it would be hard to stArt but the fact it has voltage on both sides is good I would think I dont know if one side looses voltage as they go bad
 
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Old Oct 23, 2011 | 08:07 PM
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From: Monroe/Ellensburg, WA
Sounds like the relay is bad, It shouldn't lose anything across the two big lugs... You were losing a volt...

Also sounds like you had an open circuit glow plug... However, the others sound alright so I would replace the relay and give it a try...
 
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Old Oct 23, 2011 | 10:16 PM
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madpogue
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Actually, there will always be voltage drop across the big terminals. But more than 0.3V means new relay time. Stancor FTW.
 
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