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Discussion Starter #1
I have a late 02 early 03 commonrail I think its one of the first CR's what I need to know is how do I test the fan clutch to see if it's working as it gets a bit hot in slow traffic when the A/C is going is there a procdure for doing this

Secondly can I rig a switch to turn the fan on manualy

PS this motor is not in a dodge

Any help would be great
 

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Does it have any wires running to the clutch?
If it does, I don't see why you couldn't activate it with a switch.
I wired in a switch to run the electric fan on a Cutlass I once owned so I could activate in the event of a coolant switch failure.
Like most late model stuff, the connection for current flow is made on the ground wire.
 

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Here's some info out of the '03 manual,

Click on the thumbnail then again on the picture that opens up.
 

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Discussion Starter #5
Thats great mate so pin 1 is a park lock out what dose that mean? thats the one I was told to earth out to get it to lock in but that didn't work I take it that this is all 12volt?
What one do you think would be the one to put the switch in?
 

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I don't know about the Park Lockout or the rest of that system.
The book seays the ECM controls the thing.
Since connections are made on the ground side, I'd try grounding the fan speed for a quick second and see if that locks the fan on.
 

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Good thinking on the fuse.
 

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Discussion Starter #10
Good thinking on the fuse.
Well Clunk dont I feel like a dick I did some moer home work re my fan prob & went back to the start and someone said to ground pin 1 whitch I did but I didnt leive it grounded for long enough after re tring it again today it takes 6-8 seconds for the fan to kick in so all is good now :D
 

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Very good but you're not through yet.
It looks like the fan speed might be variable since there's a fan speed wire.
What do you think about connecting a potentiometer/volume control/variable light dimmer?
 

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Discussion Starter #12
When the fan locks in it is at full speed & is pritty loud
ever since I have had the engine in the car the fan has never come on that hard
 
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