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Richard, Dodge Technician
Category: Dodge
Satisfied Customers: 4141
Experience:  Over 26 years of experience as lead tech and shop foreman.
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2006 dodge grand caravan sxt: ac..all the fuses and relays, they are

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I have a 2006 dodge grand caravan sxt. The ac is not working. I have checked all the fuses and relays, they are okay. The ac clutch doesn't engage. I have gauges and want to add some freon but I don't know how to over ride the three wire low pressure switch so I can engage the clutch.

Hello and welcome to Just Answer!

All you need to do is remove the a/c clutch relay from the fuse relay box in the engine compartment and jump terminal 30 to 87 and that will engage the clutch while you charge the system.

Click this link and download the diagram.

I hope this helps, let me know!



Richard and 3 other Dodge Specialists are ready to help you
Customer: replied 7 years ago.
Could you tell me what kind of pressures I should read on the guages when this unit is full. I don't want to overcharge and blow something up. Thanks!

It is very hard to properly charge an automotive a/c system to the correct amount by just using gauge pressures. It all depends on ambient temperature and humidity. Refrigerant is pressure temp related, so the ambient temp has an effect on the pressure readings.

If you had a scale you could measure the amount you are putting into the system, the charge amount for front a/c only is 1.50 lbs and the charge amount for front and rear a/c is 2.38 lbs.


If you have no way to measure the amount your are putting in, it is very hard to know when you have charged it with the proper amount.





Customer: replied 7 years ago.
Thanks. I understand . I am using the 12 oz cans of freon so I can track that easy enough. I was mainly looking for a low and high side pressure so I could guage if the compressor is working properly. Thanks!

Click here to view a chart for different ambient temperatures and pressures.

Find your outside temp and compare it to the other readings.

I hope this helps you, let me know!



Customer: replied 7 years ago.
Hey thanks Richard. I appreciate that. It did help. Take care

No problem!