A/C Compressor relay location

Tiny
MATTHEW LEESER
  • MEMBER
  • 2009 DODGE CARAVAN
  • 3.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 111,800 MILES
Hello, I am having a problem with my AC system. My compressor is not engaging. I think the refrigerant level is low. I wanted to see if I could turn the compressor on by bridiging a wire. On the fuse panel.

The owners manual is not clear. Would you tell me the location of the AC compressor relay in thr fuse block? And what ports to insert the wire to turn it on?
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Saturday, May 5th, 2018 AT 1:57 PM

31 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good afternoon.

There is no compressor relay it is controlled by the TIPM here is a wiring diagram to help you see how the system works. Check out the diagrams (Below) so you can see how the system works. Please let us know what you find.
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Saturday, May 5th, 2018 AT 2:37 PM
Tiny
MATTHEW LEESER
  • MEMBER
Yes it is a 2009 Dodge Grand Caravan 3.3L SE. I have attached a picture of the owners manual. The VIN number is 2D8HN44E29R650812 if this helps.
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Saturday, May 5th, 2018 AT 3:08 PM
Tiny
ASEMASTER6371
  • EXPERT
Okay, it is under Town and Country.

There is no relay, the PCM controls the operation of the clutch.

Roy

Chrysler 2008 to 2009 mini vans, the power-train control module controls the compressor clutch electrical circuit.
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Saturday, May 5th, 2018 AT 3:14 PM
Tiny
MATTHEW LEESER
  • MEMBER
Hello Roy. My understanding is the PCM is sends a signal to TIPM to activate the AC compressor clutch. Which relay in the TIPM would control the clutch?
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Saturday, May 5th, 2018 AT 3:37 PM
Tiny
ASEMASTER6371
  • EXPERT
Okay, there is no relay for the compressor clutch, it is solid state. The PCM sends a signal to the TIPM and then off to the compressor. It is based on the input from the pressure sensors and the TIPM look at the wiring diagrams above to see for yourself! The system has pressure switches to prevent the compressor from being damaged by running low on charge.

Diagram attached.

Roy
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Saturday, May 5th, 2018 AT 3:44 PM
Tiny
BRANDON SMITH
  • MEMBER
I have a 2016 grand caravan act, the actual worked great, then one day it blew out frost then no longer worked. Heater still works great but no AC. Any ideas?
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Sunday, July 14th, 2019 AT 10:44 PM
Tiny
ASEMASTER6371
  • EXPERT
We would be happy to help you.

Please start a new question and we will be glad to help you with this issue.

Roy
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Monday, July 15th, 2019 AT 12:29 AM
Tiny
MCHENDRIX19
  • MEMBER
Need help can’t find schematic to locate relay for ac clutch compressor it blowing but not ingaging the compressor 2011 Dodge Grand Caravan mainstream 3.6
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Saturday, August 31st, 2019 AT 1:39 PM
Tiny
ASEMASTER6371
  • EXPERT
You need to start a new question from the beginning.

Then we will be glad to help you with your issue.

Roy
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Saturday, August 31st, 2019 AT 1:43 PM
Tiny
HECTORSR3083
  • MEMBER
I did a bypass on mine. But kept thinking it was a power problem. Unfortunately, it wasn’t it’s a ground problem because although you send power to the compressor you need the high fan side to also activate otherwise
the hose will rupture from the pressure.
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Thursday, April 9th, 2020 AT 10:56 AM
Tiny
ASEMASTER6371
  • EXPERT
Why did you bypass it?

What was the original issue?

Roy
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Thursday, April 9th, 2020 AT 11:04 AM
Tiny
HECTORSR3083
  • MEMBER
Old compressor gave out it got locked replaced everything front to back new expansion valves new evaporators new pressure switch new compressor.
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Thursday, April 9th, 2020 AT 11:08 AM
Tiny
ASEMASTER6371
  • EXPERT
Okay, got it but why did you bypass the compressor control? Did it function prior to the failure?

Roy
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Thursday, April 9th, 2020 AT 11:11 AM
Tiny
HECTORSR3083
  • MEMBER
Yes, everything functioned but once everything was replaced it never turned on. At first I sent power to it but ruptured the hose because the high fan side was not turning on.
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Thursday, April 9th, 2020 AT 11:13 AM
Tiny
ASEMASTER6371
  • EXPERT
Okay, what is your VIN number? Let me get a diagram for you.

The high pressure switch should have prevented that from happening.

Roy
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Thursday, April 9th, 2020 AT 11:15 AM
Tiny
HECTORSR3083
  • MEMBER
I even replaced the control switch inside and the entire fuse box under the hood, nothing.
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Thursday, April 9th, 2020 AT 11:15 AM
Tiny
ASEMASTER6371
  • EXPERT
Okay, get me your VIN and I will get a diagram for you and see if we can find the issue.

Roy
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Thursday, April 9th, 2020 AT 11:18 AM
Tiny
HECTORSR3083
  • MEMBER
K
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Thursday, April 9th, 2020 AT 11:21 AM
Tiny
ASEMASTER6371
  • EXPERT
Cannot read the VIN in the background. The flash covers it over.

Roy
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Thursday, April 9th, 2020 AT 11:28 AM
Tiny
CHASCHL
  • MEMBER
  • 2000 DODGE CARAVAN
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
Just two days ago with no warning, our 2000 Dodge Caravan Sport (base model - no extras) started running sluggish when I depressed the accelerator. I let of a little and it would go, but not if I punched it again. Being hot or cold didn't seem to matter, either. Last time I had the van repaired our mechanic told us we should replace the spark plug wires. I reasoned that changing the spark plugs and wires couldn't make things worse so I gave it a shot. When I finished, the van would turn over, but it would not start. Hanes is helpful, but it bounces from chapter to chapter and is hard to follow if you lack confidence in fixing your own vehicle. I did not use the busing rings that come with te plugs because there were no instructions to do so on the box the spark plugs came in, nor in the Hanes manual. I thought this might have damaged something since I tried to start it for 10 minutes before giving up. I later put the rings on, but the symptoms did not change.

I moved on to the more challenging problems based on the Hanes manual troubleshooting guide under "Engine turns over but won't stay on" and the next thing I started to replace is the fuel pump and filter. However, now when I turn the ignition to on without engaging the starter loud clicking noise comes from the relay box. When I tried to find out which one it was I narrowed it down to three relays including "A/C Clutch Relay", "Auto Shutdown Relay", and "Fuel Pump Relay". The clicking was so severe I couldn't tell if one or all of these were going haywire. Since all of the relays are the same I tried unsuccessfully to fix the problem by swapping some of the relays.

Now, my van is on jack stands waiting for me to take down the fuel tank (after I empty it) and replace the filter and pump.

Am I on the right track or am I chasing a shadow?
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Monday, July 27th, 2020 AT 1:15 PM (Merged)

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