Where do I locate the AC fan relay

SNUGGLEZ74

MEMBER
2008 DODGE RAM
5.7L
V8
4WD
AUTOMATIC
150,000 MILES

I replaced the condenser and the fan on my truck but now the fan continually runs. I saw that it may have something to do with the fan relay, but I cannot find it in my fuse box.
Can you guide me?

Wednesday, February 26th, 2020 AT 9:23 AM

6 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

I attached a picture of the location for you.

Roy

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Friday, April 23rd, 2021 AT 10:44 AM

SNUGGLEZ74

MEMBER
4 POSTS

This is what I have as a fuse box. I am not understanding why it looks different than the diagrams I have seen and you sent. Should I be looking somewhere else for that relay?

Thanks for your help.

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Friday, April 23rd, 2021 AT 10:44 AM

ASEMASTER6371

MECHANIC
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Okay, thanks.

That is called the totally integrated power module or TIPM. The relay is electronic and inside the unit. It is not serviceable.

It provides power to the compressor once it sees the signal from the pressure sensor.

This is a very common failure for this issue.

Roy

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Friday, April 23rd, 2021 AT 10:44 AM

SNUGGLEZ74

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4 POSTS

So what should I do to get this fixed?

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Friday, April 23rd, 2021 AT 10:44 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

You need to be sure you have a signal from the pressure sensor to the ECM. You will need a scan tool to check that.

Make sure the pressures are correct. With the system at rest, the pressure should be equal on the high and low sides and about the temperature outside.

If all that is good, replace the TIPM.

Roy