For the 3rd time in as many weeks, the CEL has come on. Per the dealer, the first two times had glow plugs 1 & 2 putting out high amps. I suspect this CEL is the same.

My thinking is there is something else going on besides a bad GP. Perhaps a bad GP Controller? Any ideas/thoughts on what may causing this? I'd like it to be fixed right instead of fixing the symptom.

There's been more then a few glow plug harnesses found to be put on wrong where they are reversed. If that's the case for you then it's really glow plugs 3 and 4 that are bad. And it's most likely high resistance and not high amps Check for a number one on the harness going to the front glow plug

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

You can also trace a wire up to the 4:1 connector - pull that and you can measure all 4 glow plugs - to ground - you should have ~ .5 to 1 ohm (note: that's really low make sure your meter can read it) - bad ones are typically 50-100+ ohms.

pull the cap off of the plug you think is bad - remeasure the resistance - it should now be open.

FYI - the GP controller costs about the same as one glow plug - so it should be replaced as soon as you have a second plug die.

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2005 CRD
stuff
Skeptic quod gratis asseritur, gratis negatur

Revised Part number for the new OEM glow plug controller is : 56044671AC

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2006 Liberty Limited CRD, Deep Beryl Green, Yeti tune, Arp studs, new cams, rockers, lifters, TB. "Green Monster"
2005 Liberty Sport CRD, Deep Beryl Green, GDE Hot Tune, ARP studs. "Rocket"
1982 Fiat 124 Spider Convertible. "Fiona"

Thanks to everyone for the replies. Took it into the dealer yesterday and told them the above mentioned possibilities. They stated they may have gotten a bad batch of GPs. Additionally, they stated they did extensive troubleshooting/testing on the GPs, harness and controller. Time will tell if they fixed it right. I sure hope so!