Well Since I bought my truck I have had Electrical issues with my truck..

Odometer did not work, tach did not work, a/c control did not work, heater fan did not work, the list went on and on..

For the most part I have fixed everything except the A/C.

So last weekend I was doing a bunch of yard work and I needed to run tolowes well the wife wanted to ride along so I got ready to get into the truck and she said " HECK NO is it 95 outside".. so we took her Grand Cherokee.

So it got me thinking my wife is due in 4 months maybe I should try to get the A/C working..



So that leads us into this "How To" topic.

SAFETY FIRST!

- Have a known good fire extinguisher within sight.
- Have a clean, uncluttered work area.
- Have good lighting.

If you burn down your truck or kill your A/C compressor I am not liable this is only a reference guide for those of us that have tried everything...

items you wil need:
- electrical wire
- toggle switch
- electrical end connectors.
- wire butt connectors
- wire cutters




.

 

You will be surprised how easy this really is..

Step 1:
take some electrical wire and strip the ends..
then clip on some roach clips so you are making mini jumper cables.
then attach one side to battery positive side
and stick a paper clip in other side with one side of paper clip sticking out to a point.
remember this is now a HOT wire


step 2:
locate the plug in the picture below.
you are looking for the blue wire.
now stick the paper clip into the blue wire hole and see if your compressor clicks.
If it clicks that means your compressor clutch is good.
Do Not leave power to clutch
make sure you pull out the paper clip





If the clutch clicked the proceed on.. if not then stop and go see a professional A/C guy.




.

 

Step 3:
Before you go any further you need to make sure your A/C is charged.. if it has no Freon in it you will burn up your Compressor..

So how do you do this?
1. go to professional
2. go to auto parts store and buy cheap "do it yourself" kit.
3. after you do the rest of the wiring.. you must connect the "do it yourself" kit before you turn on the system.


Step 4:
Follow the wiring harness up until you get to a good open spot that you can pull all the wires out and find the BLUE wire again..

You will need to cut this wire and splice in a NEW wire
see pic:




step 5:
on the firewall you will see the low side A/C relay.. if you do not want to burn up your compressor you need to connect to this.
This lets the compressor cycle on and off.

You will connect the wire that you spliced into the blue wire to one side.

The other side will go inside the cab to a toggle switch.

 

Step 6:
Run the wire into the cab and connect it to the power side of the toggle switch
then run another wire from the AUX power side of the toggle switch to Power.. preferably ignition switch so when you turn off truck you do not forget to turn off toggle switch

My switches are just temporary because I wanted to make sure this is gonna work



So now you have it all connected.. what is next?

you start your truck and turn on A/C switch you just installed and turn the fan on high, then go back to the "do it yourself" kit that you hooked the the A/C lines.. it is best to shake the can while it is filling.. [just follow the directions]

once the system is full you should start to feel cool air inside the cab



So did it work??

HECK YA

I have full A/C and it fells great..

Hope this helps some since is getting pretty HOT in most states.

 

I am definately going to do this once I get my truck back from the gear shop. I hotwired my AC with Dave's guidance so I know its an electrical problem. But I might just bypass the whole factory setup and do what you've done above.

 

Ya I spent hrs and hrs trying to fix my problems.. but now that is works and it was the last thing I am just gonna mount the toggle switches permanent and be done with it.. to me it is not worth the time and money to fix the wiring especially since I have spent so much already trying.

 

Bruiser, I noticed you A/C line routing is a lot different than mine, My low side relay(also known as the pressure switch?) is pointed towards the fender and not the motor and the pop can shaped thing is mounted on my fender.

 

Not sure about why the switch is different.. oh and yes my "pop can" things used to be mounted to fender but the mount broke

 

Great job love the picture they really help