Trying to finish up this project (pulled engine, installed engine). There is a two stranded wire with an eye on the end that comes out of the same harness as the yellow wire that goes to the starter solenoid. Looks like it should go on to the main lug where the battery cable connects, but I can't remember (my son helped with some of the work and he is probably the one that disconnected this wire). I looked at one of my other CRD's and did not see this wire (this Jeep is a Limited and the rest are sports). Hate to hook it up and fry something. Here is a picture with the ring circled in red:

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My collection of CRD's:
2005 Deep Beryl Green Pearlcoat
2006 Light Khaki Metallic Clearcoat
2006 Inferno Red Crystal Pearlcoat
2006 Midnight Blue Pearlcoat
2006 Gold Limited
2015 Black Ecodiesel
2015 Black Ecodiesel 2

Looks like a ground wire.
Not sure if it connects to the starter, block, or body/frame.

edit
on mine it connects to where the motor mount bolts to the block

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U.S. Army Retired

ill go take a look during my lunch break and see if i can see it on mine

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2006 Jeep Liberty CRD Limited - Rebuilt at 145K
GDE Eco Tune
Weeks 1+2
ARP Studs
New rockers + Valves
New #1 pistion and all connecting rods
New Crankshaft
Carter In-Tank Pump

I think it goes on the block ground stud which is tough to see. You should have a spare nut for it, or its on the stud loose I'm guessing?

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05 CRD: H.D.S2 stat,WW Ironrock trilink&LCA's, OX rear,ARB front, 4.10's, ARB bumper, Suncoast,OME 3.5, JBA UCA,rock rails, Moabs&265/75 Duratracs, GDE tunes ,FFD fan,ARP's, 2 micron fuel, new valves,sasquatch battery tray & grid heater, tensioner relocated
Mech fan, VH & AC delete

Just looked at mine, its on the same stud as the negative battery cable bolts to.

also looks like the same wire i had a question about when i was putting mine back together: viewtopic.php?f=5&t=85524

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2006 Jeep Liberty CRD Limited - Rebuilt at 145K
GDE Eco Tune
Weeks 1+2
ARP Studs
New rockers + Valves
New #1 pistion and all connecting rods
New Crankshaft
Carter In-Tank Pump

Thanks guys!

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My collection of CRD's:
2005 Deep Beryl Green Pearlcoat
2006 Light Khaki Metallic Clearcoat
2006 Inferno Red Crystal Pearlcoat
2006 Midnight Blue Pearlcoat
2006 Gold Limited
2015 Black Ecodiesel
2015 Black Ecodiesel 2

I think its a ground that should be on a stud on the block. The end of the stud has a torx head IIRC.

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http://www.Colorado4Wheel.com
"Its not about what you can DO with your Jeep, its about where you can GO with your Jeep."
Knowledgeable - But Caustic