Takes about 10 seconds to get to the point you can make a resistance measurement,

pull the connector - it's got 4 pins - measure pin to ground - 3 will be ~ .5 to 1 ohm, 1 will be way off - trace the wire on the way off to a cap - pull the cap - re measure to confirm you got the right one - it should now be open.

you may not be able to get to cyl 3 easily - mine has always been 2 - 4 doesn't look that hard

_________________
2005 CRD
stuff
Skeptic quod gratis asseritur, gratis negatur

Well I can vouch for Brickman Dodge Jeep of Antigo Wisconsin, pretty good diesel mechanic that
works on the cummings trucks there. The dealership has sold a few CRD's but he works on them
occasionally, but the reason the number 1 glowplug replacement and module by another dealership
did not work, and the code 1261 continued to show up was..................................................previously
posted here also, the wiring harness was reversed from factory, so that when #1 showed up, it was
actually #4. Of course had I taken it there first, they probably would have tested #1 and found it
to be good, and then they would have dug deeper to try to figure out the real issue. So I have
two new glow plugs a new harness and module--only two more to go now. Light has stayed out.
So even though I have seen others on this report the wiring harness is backwards, I thought surely
it does not happen that much, seems it can happen often. Testing the resistance of the glowplug is
a must as part of troubleshooting this issue.

_________________
2005 Silver Limited CRD 53,000 miles
GDE EcoTune / Trans tune
PML Differential Cover/Crankcase Mod
Tal & Hadas Grill Guard/TransGo Shift Kit
V-6 AirBox/Lunar Boost & EGT
Lund Cold Weather Grill Insert
OEM updated Filter Head, Cummins Lift Pump