2.7 glow plug fuses

[Globetrotter]

Hi everyone. I live in England with my 2003 GC 2.7 CRD Overland. Technical info is not easy to get over here and whilst WJ Jeeps is a mine of good info it is American and they don't have the 2.7. So I figure that what you guys don't know about the 2.7 isn't worth knowing so I turn to you to sort my current problem out.
Both 50 amp fuses for the glow plugs blow instantly when the plugs are operated. There are two separate circuits for the plugs, one does the odd numbered plugs and the other the even numbers. I can't see where there is a connection between the two so why do both fuses blow. There must be a dead short somewhere but how can it affect both circuits?
I would be very grateful for any help in sorting this out.

[Globetrotter]

Come on fellas, no ideas?

[fester]

I got rid of my manual when I sold the car so can't look anything up but hopefully one of the other guys can for you. However I don't recall much talk about issues with the glow plugs other than the od one malfunctioning, I don't recall anyone having a major meltdown like you describe.

[bodgie]

The manual says 1,3,5 are on one relay and 2 and 4 are on the other.

The two relays are in the PDC that you should be able to easily identify, I'd pull them and check continuity with a multimeter to see if there is a short to ground.

Terminal 87 of the relay goes to the glow plug and ping 30 goes to the fuse. Glow plugs 1,3,5 have a black wire going to them and 2 and 4 have a black/yellow wire if you want to identify the cable.

If you do a bit of googling you should be able to find an electronic copy of the manual.

HTH,

Jason

[Globetrotter]

Thanks fellas. I'll certainly check those wires Bodgie.

[drover]

http://www.ausjeepoffroad.com/forum/showthread.php?t=124873

Everything 2.7 CRD has a link to download a manual and other helpful bits.

[Globetrotter]

Thanks Drover. That's one hell of a link.