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How do I get a new 2002 Dodge Dakota AC Compressor to kick…

Customer Question
How do I get a...
How do I get a new 2002 Dodge Dakota AC Compressor to kick on. Thought there was a way to bypass the relay using a paper clip at relay pin 87 and 30 slots, but that does not work. Fuses are good. Thx.
Submitted: 2 years ago.Category: Dodge
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Answered in 2 minutes by:
7/3/2015
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
George H.
George H., ASE Certified Technician
Category: Dodge
Satisfied Customers: 19,190
Experience: ASE Master 15+ years
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Hello I will help you with your question, Do you have a voltmeter or a 12 volt test light? Check to see if you have 12 volts at the paperclip. Let me know what happens, the engine size and if this is 4WD. Thanks
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Customer reply replied 2 years ago
George, thanks - I have a volt meter, but wife wants us to get ready for trip. Is this something that can be done tomorrow am?
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
Yes, I will be here tomorrow so please post back to this thread Thanks
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Customer reply replied 2 years ago
Thx - will do. What time is earliest time EST you are available?
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
Usually about 6 then on and off during the morning.
Let me know how I can help
Thanks
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Customer reply replied 2 years ago
Super - it's a 3.9 2wd...
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
OK, check the paperclip and if you have 12 volts there check at the connector to the compressor.
Let me know how I can help
Thanks
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Customer reply replied 2 years ago
George, we have severe weather alerts here in Atlanta this am and leaving for a trip in a few hrs. Apologies, but may I contact you when I'm back? ...not sure how this works... Thx.
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
No problem at all, stay safe and I will be here when you can get back to it. The site will send automatic emails, don't be concerned.
I will watch for your post when you get a chance to check it out.
Thanks
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Customer reply replied 2 years ago
Thx - also, I pressed a request for a call by mistake. I will email you when we return - looking forward to getting the av fixed ASAP.
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
No problem, I will watch for your post.
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Customer reply replied 2 years ago
George, we're back and if you are available, I'd like to get this ac problem fixed. I don't mind the up charge for the phone call - it might make it easier:(###) ###-####
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
I'm sorry but I am unable to speak on the phone.
Do you have power at the compressor connector with the paprclip in place and if you do not do you have power at the paperclip?
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Customer reply replied 2 years ago
You may have to walk me thru the process on how to check the power at pins 30 and 86. Right now the system is evacuated, but I have not started to put freon in yet. This is where I got before and compressor clutch would not engage to pull in the freon...
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
OK, see the pins ladled 30, 86, 85,87?
30 and 87 are connected when the relay is turned on.
There is an electromagnet between 85 and 86, 12 volts to one and ground to the other turns on the relay so 30 closes to 87 like a switch.
Check between the relay pin sockets and ground, two should have 12 volts with the key on.
Let me know if you find those
Thanks
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Customer reply replied 2 years ago
Yes, I'm familiar with the relay set up, so I do understand this. I tried my voltmeter at the compressor connector, I did get a higher reading, but not the 12 volts I expected. I may just have the wrong setting on the meter...
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
Start at the battery with the meter, if you have 20 DCV that would work best and you should expect 12.6 volts on a full charge. Let me know if that is clear Thanks
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Customer reply replied 2 years ago
Checked the battery and it's good. I'll follow your lead, but could this be a low pressure switch probl?
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
NO, if you cannot physically turn the compressor on by using a paperclip to simulate the relay it is not a low switch problem. One step at a time, get the clutch to come on then check to see why the relay is not turning on the clutch. Let me know what you find Thanks
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Customer reply replied 2 years ago
Ok, lol - ready for the next step when you are
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
Check at the relay and see if you have two pins that show 12 volts, one of those pins is #30 or #87, should be marked on the relay, connect those two together with a paperclip, make sure you have 12 volts on the paperclip by turning the key on and you should hear the clutch on the compressor pull in. If it does not measure at the clutch connector to see if you have 12 volts there.
Let me know what you find so I can help
Thank you
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Customer reply replied 2 years ago
Ok, put meter on dcv and connected to pins 87 and 30. And got an increasing reading from 30 all the way to 130... This increasing reading happens whether key is in or not...
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
Just measure one pin at a time, put the black lead to a clean metal ground. You should read the same as when you checked the battery. Use the negative battery terminal for the black lead if it is close enough.
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Customer reply replied 2 years ago
When I say "connected" I mean in the relay box with relay out
Customer reply replied 2 years ago
Ok - will check that way and get back..,
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
YOu ground your black lead and use the red lead to probe one relay pin socket at a time. Find the two that show 12 volts Dc that way.
What meter do you have? Brand and model?
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Customer reply replied 2 years ago
Ok, been playing with this a little; only pin 86 shows 12 volts. It's an innova 3320 meter.
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
OK, then we need to find out why the fuse B in the underhood fuse block does not send power to the relay? Blown fuse?Let me know if you need the location Thanks
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Customer reply replied 2 years ago
Yes! It's a blown fuse...simple things - I should have checked this :-/Do you think I can try to recharge the system at this point ant if needed jump pin 30 and 87 if needed to engage the ac clutch?
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
Try putting refrigerant in, if you can get the low pressure switch to close the compressor will run. If it does not you can jump the relay with the paperclip.
Please let me know if you have further questions
Thank you
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Customer reply replied 2 years ago
Will do...
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
Always glad to help
Thanks
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Customer reply replied 2 years ago
Ok, ac comp clutch is on, but still not taking all of can 1. How long should it take?
Dodge Mechanic: George H., ASE Certified Technician replied 2 years ago
May take 15 - 20 minutes to get it all in.
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