This is a discussion on no A/C within the GTO forums, part of the Vehicle Specific category; Purged and recharged the a/c in the goat last night and for some reaspn the a/c clutch isn't engaging...if I ...
05-27-2010, 02:46 AM #1
Purged and recharged the a/c in the goat last night and for some reaspn the a/c clutch isn't engaging...if I use a jumper wire to hot the clutch locks up like it supposed to and I get nice cold air.
Any ideas? Anyone know how to ohm the pressue switch by the driverside headlight?
05-27-2010, 06:04 PM #2
- Join Date
- Jan 2009
- Paterson/Ridgewood, NJ
Phantom Black Metallic
- 2004 GTO M6
You have a multimeter? I assume you need to switch it to read ohms and have the car switched to "run" to see if you are getting power. You check your relay?
05-27-2010, 06:39 PM #3
If you suspect a bad pressure switch you can run a jumper a cross the two terminals on the connector while the engine is running and A/C on to see if the clutch engages. If your A/C worked before you recharged it, are you sure you have the correct amount of refrigerant in the system?
05-28-2010, 02:09 AM #4
I have a multi meter, but not sure how to test the switch because its a 3 wire switch not your normal two wire (on off switch).
The a/c worked last year, but tried it for the first time the other day since my 408 swap. I have everything hooked up right in the engine compartment and have checked all the fuses and relays.
I'm stumped here lol
05-28-2010, 03:31 AM #5
- Join Date
- Mar 2008
- OHIO"S only 9 second GTO
Phantom Black Metalic
- 2005 GTO
weird ,tryed mine yesterday it as well would not work,I have not checked anything as of yet,blew cold last year,maybe a control issue,had the heater do the same thing then all at once it started working again... let us know what you find..mods: custom built twins, built 408 w/l92 stock GM heads,GM matching intake,drag bags,frame ties,aluminum drive shaft, performabuilt 4l80e,Yank converter,ohios fastest and quickest 04-06 GTO 9.52 at 144mph. 1.50 60ft on stock rear end and shafts/suspension,on drag radials.
05-28-2010, 03:42 AM #6
If its three wires one will be power, the other will send the signal to a a/c module, and the third should be a chassis ground. Im not sure what wires are what, but i can check at work today.
05-28-2010, 07:28 AM #7
- Join Date
- Nov 2005
- Royal Oak, Michigan
- 2004 GTO A4
Did you check the pressure of the charge? If you over-charge the system, it can prevent the compressor from running due to tripping the pressure switch. I did this on my 00 SS a few years back when I tought the air was not cold enough. Turns out that black interiors are just fricken HOT!
05-28-2010, 10:13 AM #8
Thanks MNGTO if ypu don't mind!
Yup joe pressure is right on the money
05-29-2010, 01:42 PM #9
Sorry it took so long. The PPL/WHT wire is a 5v ref, GRN/BLK is pressure signal and GRN/ORG Low Ref. I would verify that you have 5v to the sensor. Then check the signal voltage. All of the wires go to the PCM
05-29-2010, 03:06 PM #10
Thank you MNGTO! I'll check it out this weekend
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By black crowe in forum General HelpReplies: 23Last Post: 07-14-2009, 04:08 PM
By Sparrowdocent in forum General HelpReplies: 1Last Post: 03-09-2009, 06:13 AM
Help: a/c not holding vacuumBy kool-aide in forum General HelpReplies: 1Last Post: 07-20-2008, 06:12 AM
By Ed Blown Vert in forum CorvetteReplies: 0Last Post: 12-18-2007, 09:40 PM
By Ed Blown Vert in forum Almost Anything GoesReplies: 0Last Post: 10-11-2007, 09:40 PM