Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

The A/C controls the coolant fan.. but not the A/C!

Thread Tools
 
Search this Thread
 
Old Feb 1, 2008 | 12:36 AM
  #1  
19CamaroUSMC89's Avatar
Thread Starter
Junior Member
iTrader: (1)
 
Joined: Jan 2008
Posts: 16
Likes: 0
Car: 89 Camaro RS
Engine: 305 TBI
Transmission: T-5
The A/C controls the coolant fan.. but not the A/C!

The only time my coolant fan turns on is when I turn on the A/C.. But the A/C itself doesn't turn on.. I've only had this car for a few months and its very clear to me that this car was disassembled and re-assembled by a monkey with down syndrome.. anyone have any ideas on this one?
Reply
Old Feb 1, 2008 | 02:02 AM
  #2  
Fullsizewagon's Avatar
Senior Member
 
Joined: Jul 2006
Posts: 609
Likes: 0
From: Oslo, Norway
Engine: '85 Monte SS L69 305
Transmission: TH 200-4R
Axle/Gears: 3.23
Re: The A/C controls the coolant fan.. but not the A/C!

The A/C won't engage the clutch until the low pressure switch closes. Either the switch is disconnected, defective, or the A/C system is actually empty.
Reply
Old Feb 1, 2008 | 03:29 AM
  #3  
19CamaroUSMC89's Avatar
Thread Starter
Junior Member
iTrader: (1)
 
Joined: Jan 2008
Posts: 16
Likes: 0
Car: 89 Camaro RS
Engine: 305 TBI
Transmission: T-5
Re: The A/C controls the coolant fan.. but not the A/C!

Well going off of the dozens of cut wires I'm finding all over the car I'm going to guess that its disconnected.. Can you point me in the direction of where I can find this switch and how to test it? Sorry this is my first project car and I'm learning :-)
Reply
Old Feb 1, 2008 | 07:49 AM
  #4  
Jeff91RS's Avatar
Member
iTrader: (1)
 
Joined: Dec 2007
Posts: 493
Likes: 0
From: Big Rock,IL
Car: 91 RS
Engine: 350 TBI
Transmission: World Class T-5
Axle/Gears: 3.27 9-Bolt LSD
Re: The A/C controls the coolant fan.. but not the A/C!

invest in a gm wiring diagram. you can either see if a dealership will sell you theres (they arent supposed to but u can use the reasoning of how often does a car taht is atleast 16 years old come in, and they have a different book for every year) or go on ebay cause some rouge mechanic for gm already stole it. they are a god send
Reply
Old Feb 1, 2008 | 10:17 AM
  #5  
BigBadLou's Avatar
Supreme Member
iTrader: (3)
 
Joined: Jul 2004
Posts: 2,989
Likes: 9
Car: '91 Z28 convertible
Engine: TPI
Transmission: T5
Axle/Gears: 3.27 posi disc
Re: The A/C controls the coolant fan.. but not the A/C!

The low pressure switch is on the drier body. It has two wires on it.
You can do a short test:
- turn the ignition on (do NOT start the engine)
- turn the A/C controls on
- under the hood, pull off the lower pressure switch connector and short the two wires with a paper clip
If the A/C compressor clutch engauges (you can see and hear it), the eletricals are good.

Hopet this helps.
Lou
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Bubbajones_ya
Cooling
24
Jul 6, 2024 08:32 PM
89 formula TPI
Tech / General Engine
13
Oct 6, 2015 08:40 PM
m00n420
Firebirds for Sale
0
Sep 11, 2015 02:39 PM
FormulasOnly
Tech / General Engine
3
Sep 10, 2015 09:07 PM
85Special
DIY PROM
1
Sep 3, 2015 04:21 PM




All times are GMT -5. The time now is 12:04 PM.