Im having some problems with my CRD.

First of all I think my alternator is bad. When the motor is idling you can hear that the alternator is making some kind of vibration noise. Its worse when you turn on the lights and it gets better when you turn them off. I opened the hood and listened very closely to the alternator, its definitely coming from their..... OR whatever is belt driven and sitts right below it. Sounds like bad bearing to me.

It also likes to vibrate every once in a while for about 2-3 seconds when idling. Its feels like missfiring on a gasser. Does that maybe have anything to do with the alternator?

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2005 CRD Sport
Mods: Glasspack, OME HD Struts & Springs, 2" Daystar lift,
255/70/16 General Grabber AT2's on MOAB's
ORM&EHM with great success!
TJM T17 Bumper, 50W KC HID's

discontct the battery "hot" lead when its running...

if it stays running your Alt is working; if it dies then well the Alt is dead...

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05 CRD
3" Rough Country Lift
SAMCO SPORT Hoses
Magnaflow Muffler (12226)
CAT 2 Fuel Filter
Fumoto Drain Valve
EGR replaced at 50K
in service 8/31/04
Sold 7/21/10 125k miles
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Paved Roads, another form of unnecessary government spending...

Alternative: if you have a voltmeter, a battery's "normal" voltage when everything is off is around 12.6 volts (not more). When the engine is running and the alternator is working correctly, it is typically 13.6 volts (sometimes a bit more, occasionally a bit less).

FYI - Mark
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2005 Liberty CRD
2004.5 Cummins 5.9L TD, F1s, NV5600 6-speed in a '93 GMC Suburban

But if my alternator would be bad, wouldnt that kill the battery in a very short amount of time? Its been like that for almost a month now.

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2005 CRD Sport
Mods: Glasspack, OME HD Struts & Springs, 2" Daystar lift,
255/70/16 General Grabber AT2's on MOAB's
ORM&EHM with great success!
TJM T17 Bumper, 50W KC HID's

Sure it's not the A/C? Mine occasionally does something like this when the A/C is on.....

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Me - '17 KL Trailhawk 4x4, Rhino, P245/65R17 Destination A/Ts, Stock Skids, waiting for mods...
Sis - '18 Cherokee Trailhawk 4x4 - Black - Dents - Scratches - STOCK

Its doing it with the AC off too, just not as bad.

_________________
2005 CRD Sport
Mods: Glasspack, OME HD Struts & Springs, 2" Daystar lift,
255/70/16 General Grabber AT2's on MOAB's
ORM&EHM with great success!
TJM T17 Bumper, 50W KC HID's

I think its only doing it with the AC on. Its really annoying. I thought it would always do that but then I turned the AC on/off.

_________________
2005 CRD Sport
Mods: Glasspack, OME HD Struts & Springs, 2" Daystar lift,
255/70/16 General Grabber AT2's on MOAB's
ORM&EHM with great success!
TJM T17 Bumper, 50W KC HID's