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Amedee
Amedee, Dodge Technician
Category: Dodge
Satisfied Customers: 26066
Experience:  ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
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I'm dealing with a condenser fan problem in my 04 dodge ram

Customer Question

Hello, I'm dealing with a condenser fan problem in my 04 dodge ram 1500, I've narrowed it down to the relay, there's 12v getting to terminal 85 and 14.3 volts at #86 , i thought the 14 v at 86 seemed a little high, the fan works fine if I manually switch over the relay, I've also tried switching out the relay for another still nothing
Submitted: 1 year ago.
Category: Dodge
Expert:  Amedee replied 1 year ago.

Hello and welome! My name is ***** ***** I can assist you with your question. Do you have a wiring diagram for this circuit? Do you need one? Can I start by getting your VIN?

Customer: replied 1 year ago.
I have a diagram but probably wouldn't hurt to send another,
1d7hu18d24j127147
Expert:  Amedee replied 1 year ago.

Thank you for the VIN

Expert:  Amedee replied 1 year ago.

What is the issue with the condensor fan? Does it not run?

Customer: replied 1 year ago.
That's correct, doesn't run unless I manually switch over the relay, i just installed a new pcm to fix an alternator problem I was having hoping it would also take care of the fan, the alternator is working now but the fan still won't run
Expert:  Amedee replied 1 year ago.

The condensor fan relay should have two pins that have power on them. Pin 85 and 30. I suspect this is the problem. Here is a wiring diagram.

Customer: replied 1 year ago.
Pin 85 and 30 are reading 12v and 86
.2 v with ignition on
With truck running there reading 14v
86 is reading. .2vWhen I put the positive lead of the multimeter on the on the positive battery terminal and negative lead on pin 86 it reads 12 to 14 volts Wether ac is running or not
Expert:  Amedee replied 1 year ago.

That is normal. All of those readings are good.

Customer: replied 1 year ago.
Why isn't the relay switching over to turn on the fan?
Expert:  Amedee replied 1 year ago.

Either the relay is bad or there is a bad connection at the relay

Expert:  Amedee replied 1 year ago.

The relay needs two powers and one ground to activate. Once this happens, the relay will click and send power out of the fourth wire down to the fan.

Customer: replied 1 year ago.
I switched out the relay, and Im getting the control juice to switch the relay, relay still isnt switching
Expert:  Amedee replied 1 year ago.

Then something is being overlooked. Something simple

Expert:  Amedee replied 1 year ago.

Are you sure that pin 86 is getting a ground on it from the PCM?

Customer: replied 1 year ago.
How would I test that?
Expert:  Amedee replied 1 year ago.

With your voltmeter. Based on what your telling me, you already did and it checks out ok, unless you did not do the test right.. which is possible.

Expert:  Amedee replied 1 year ago.

I would leave the relay plugged in and ground the signal wire coming from the PCM going to the back side of the relay (back side of the PDC) and see if the relay clicks and the fan comes on.

Customer: replied 1 year ago.
What I'm confused about is it grounds out at 14v when hooked to the positive terminal of battery wether the Ac is running or not , I would think it shouldn't ground if the ac were turned off
Expert:  Amedee replied 1 year ago.

I agree. It sounds like your not doing the test correctly

Expert:  Amedee replied 1 year ago.

Try manually grounding that circuit with the relay plugged in

Customer: replied 1 year ago.
Ok, I'll get back to u
Expert:  Amedee replied 1 year ago.

I am glad I can help!

It has been a pleasure working with you. Please dont forget to honor your good faith deposit by rating my answer as "Excellent Service" for assisting you today.

Please let me know if you have any further questions.

Customer: replied 1 year ago.
The relay still won't switch over when manually grounding it,
With the relay in position the black lead on multimeter reads 14v on the control current and the red lead is
reading only .4v
Expert:  Amedee replied 1 year ago.

Maybe we should talk on the phone. It might be easier.

Expert:  Amedee replied 1 year ago.

Hello! It's Amedee from just answer.

I am just checking in to see how things are going and to see if you need any further assistance?

Please let me know and I will be happy to help!

Expert:  Amedee replied 1 year ago.

Hello! It's Amedee from just answer.

I am just checking in to see how things are going and to see if you need any further assistance?

Please let me know and I will be happy to help!

Expert:  Amedee replied 1 year ago.

.

Customer: replied 1 year ago.
I'm going to run some more tests sometime in the near future
Expert:  Amedee replied 1 year ago.

Sounds like a plan. Meanwhile, please dont forget to honor your good faith deposit for providing you with accurate information in a timely manner. We can still continue this conversation even after you rate my answer. Thank you very much!

Expert:  Amedee replied 1 year ago.

.

Expert:  Amedee replied 1 year ago.

Hello! It's Amedee from just answer.

I am just checking in to see how things are going and to see if you need any further assistance?

Please let me know and I will be happy to help!

Expert:  Amedee replied 1 year ago.

.