H3 HVAC the saga continues

[Humvdood]

I've taken my H3 to three different shops and no one can figure out why my air compressor won't engage.
I've posted all over the internet (including here a few months ago)...
Has anyone had any issues with their a/c after installing remote start?
I did mine by the book - I own a mobile electronics shop and have never had this issue on any other cars.
But this seems to have started right after my install and the tech2 scanner is saying there's a logic problem but won't tell me where it is.

 

[Ghostbuster]

My ac is good after my remote start install. Viper 4806v and Best buy installed it.

 

[4speedfunk]

Troubleshooting electrical problems is frustrating but, don't ignore your own logic. If it worked before...and it doesn't now...you've already answered your own question. Uninstall the remote start...put it back to stock....see if that fixes the AC.
The H3 is often possessed by the devil and these forums are littered with similar stories when adding aftermarket accessories. When in doubt...re-trace your footsteps.
And as always...check the battery connections (a common h3 problem).

 

[Humvdood]

Troubleshooting electrical problems is frustrating but, don't ignore your own logic. If it worked before...and it doesn't now...you've already answered your own question. Uninstall the remote start...put it back to stock....see if that fixes the AC.
The H3 is often possessed by the devil and these forums are littered with similar stories when adding aftermarket accessories. When in doubt...re-trace your footsteps.
And as always...check the battery connections (a common h3 problem).

I cut everything out last night and put everything back to stock and it still won't kick on. It's got something to do with the run/crank relay but I'm tired of messing with it. I took it to a mechanic buddy with more hvac experience than me to see what he comes up with. We'll see what it is and I'll post an update in case anyone else runs into a similar mess.

 

[4speedfunk]

Your story is very common. I'm so afraid of starting these crazy symptoms, that I pretty much refuse to add any tricky electrical stuff. That includes aftermarket stereos, remote starters, LED lights, etc. I know too many people, and I've heard too many stories regarding add-ons and the H3. Its a ridiculously complex electronic nightmare of a vehicle, and if there is one single thing that really sours the H3 ownership...its probably the electronics. Good luck and let us know what you find out.

 

[SedonaBound]

You might do better at an auto electrical shop with the proper diagrams than an AC specialist. Has anyone checked the compressor clutch relay?

 

[Humvdood]

You might do better at an auto electrical shop with the proper diagrams than an AC specialist. Has anyone checked the compressor clutch relay?

I own the most reputable auto electrical shop in town - which is one reason this has been so baffling.

I finally figured it out - we hooked up the tech2 scanner one more time just for grins and checked everything - it said all systems were okay so I got pissed off and smacked the bcm with a wrench and the compressor kicked on. I was like "no way, you're kidding me..."
I pulled the bcm apart and checked all the leads and everything looked okay.
looked at the black plug going into the bcm and pulled all the pins relating to the ac. the pins are like segmented butt connectors and the segment in the middle of that connector was broken and barely making contact. enough to tell the scanner it was working but not enough to actually work I guess.
I soldered it back together and I'm back in business... but I broke one of the plastic tabs that holds the connector onto the bcm so I've got a bunch of zip ties doing that for me at the moment

tldr: stupid green and white wire had a short inside the connector.

Normally when I car pisses me off this much I'd just sell it and get something else but I like this thing too much.

 

[Humvdood]

I was mostly just glad it had nothing to do with my remote start install cause that would've made me look bad... :wink:

 

[SedonaBound]

Glad you found it. I figured it wasn't a compressor problem. Nowadays, my meter is easily the most used tool in my box. I've held off getting a scanner until someone makes a Bluetooth scanner/phone app compatible with AppRadio.

 

[High Five H2]

electrical problems are nightmares. I think it's easier to unhaunt a haunted house.