air con and blower problems
hey all,
first up my blower only works on settings 3 and 4 (not 1 and 2) any ideas how to fix this?
and my air con isnt working. im gettin power to the fuses but the relay isnt clicking.
I have tried bridging the connections at the pressure switch with no luck.
I also ran 12v straight to the compressor and it worked.
Any ideas?
cheers
IF YOR NOT A HOLDEN
No this is not normal. If it works on high speed for a little while, then cuts out...then it could be the high pressure (h/p) switch on the system is tripping because of a dirty condensor. However, from what you say it is appearing to happen instantly and that the problem is in the wiring.
Has the problem just occurred with no likely cause? ie no one has been meddling under the bonnet etc?
Im not familiar with how the aircon wiring is set up in the vs.
There is an ac button that turns it on? Typically these dont become active until the fan is turned to the low speed position. ie the ac switch gets its power from after the fan switch and then goes to the compressor with the thermatic switch in series with it. Its possible the fan switch is losing contact with the ac connector when getting to the 4th speed position.(Id start my inspection here)
Fourth speed is also activated by a relay, bypassing the resistor block.....but doubt this will influence the operation of the compressor.
A system that cycles on and off often could be cycling due to the system being overcharged and the high pressure switch tripping the system. You can test for this by checking where the system is actually losing the power to the compressor......before the high pressure switch or after it.
Originally Posted by patskies
We ALL HAVE 1 THING IN COMMON:THE RELENTLESS PURSUIT OF GRIP
There is a fan resistor block in underneath the black plastic cover below the windscreen near the wiper arms,you just need to remove this plastic cover,and you will see a small cover with 2 screws under there.Under this small cover is the fan speed resistor block.The resistor coils inside this resistor block can break when they get old,which is why you loose the lower fan speeds,all you need to do is get another resistor block from the wreckers and swap it with the old broken one.Ive even opened up the metal cage thing around the block before and resoldered the wire coils back together,it works,but they dont last too long,it lasted for 3 months or so before it broke again.I just replaced it with a good one from the wreckers.I have not priced a new one,but Ive been told they are expensive.
cheers fellas,
in the resistor block can i just solder in new resistors?
and with the air con is there any websites or anythin i can get a wiring diagram off?
cheers
sick of the idiots here
Yep, that's your problem, it's quite common...
Get them from the wreckers, not expensive at all.
IF YOU CAN though, get one from a Toyota Lexen, as they use a circuit with heat sink and will last forever!
as opposed to holdens dodgy coils in a cage....
And if i'm correct, VN, VP, VR & VS use the same resistor block, so get one from any model. But do try for the Toyota one...
sick of the idiots here
ah, and sounds like your pressure switch is cactus, which is common also (not just a blocked/dirty condenser, as if it were it'd work for a few mins till it gets too hot and THEN die). Get switch replaced too!
if the pressure switch was rooted then wouldnt bridging the wires going to the switch make the aircon turn on?
there is four wires going to the switch. i presumed 2 were for the aircon and 2 were for the fans.. when i attempted to bridge them i got the fan working but not the aircon
Im gonna try a toyota one next time mine burns out if thats the case.Its weird though,Ive been told heaps of times that these cars,the commodore and the toyota lexan, came from the exact same assembly line, and that they all use exactly the same parts,the badges and trimmings are the only differences...I will check it out though if you say its different to the holden coil in the cage type resistor, Its just a failure, and holden should have updated it with something better after the VN models.
Cars cost too much.
A new resistor from Holden isnt that dear. Dont remember pricing but it is A LOT different from the old one.
Its about 5mm wide and about same length and hieght not a caged one.
sorry guys for asking.. i really need a wiring diagram.. now im gettin power to the aircon fuse. but the relay isnt clicking when aircon is turned on.. i know the relay is working fine.. the in cabin switch is not getting any power.. im presuming the problem is where the aircon switch gets its power. as when switched on that will then close the main circuit at the relay. so now my question is where does the in cabin aircon button get its power from?
cheers in advance
Cars cost too much.
You might actually be out of gas.
Mine didnt work when I first got it. Got it re-gassed and it works now.
the first thing i did was regas it.. it was full anyway...
is there only the one fuse for the aircon system?
Cars cost too much.
Just make sure there is gas by pushing the valve down...
Check the kick panel if there is more.
It is holding gas. i put the gauges on it a week after i regassed it and it hasnt dropped at all
diagnostic technician...
the ac clutch on compressor is swtitched by a 12volt siganl
12 volts in one pin and earthed out other side!~
use a test lamp to check power getting to compressor
if not
check EVERY FUSE in engine compartment as maybe someone rewired it on you (ive seen this before)
else swap relay and see if clicks when ac is turned on car running
then get back to me.....
the compressor is getting no power to it. they relay is not clicking, how ever the relay is working, checked all fuses and are fine
diagnostic technician...
relay has no power to terminal/s?
power to 86 or 30 is lost?
if relay doesnt click i assume no power to 86 which is signal side(from interior ac switch directly ((from memory)))) to make relay supply power to a/c via relay internals...
so....
if you swapped relay and it works in another circuit (hence you know relay is okay)
its probably either earth (missing open circuited) to signal side at pin 85 (85 goes to an earth)
or no power to 86?
which means switch inside car isnt supplyin power to relay to make it internally switch on ac power supply
im now looking for diagram at mates place hang on.....he doesnt have one and he has all of them......
which motor do you have vt type v6 or vn type
i have one for vt type but not old vn type
Last edited by db_notso; 20-01-2011 at 07:48 PM.
its an ecotec so a vt engine..
the switch in the cabin is getting no power at all. where does it get power from?>
ლ(ಠ益ಠლ
I went to the wreckers, Ask them for a fan speed resistor, they pulled it out the car, gave it to me.. and now I have a 4 speed fan.. ; so get it replaced..
This should help with where power comes from..Hopefully you can understand..
VSV6 Auto Wiring Diagram.pdf - File Shared from Box.net - Free Online File Storage
I was guessing you had a VS..
I also tried attempting to bypass the pressure switch and had no luck.. ; Ive got no gas so im hoping if I get some gas it will help me..
diagnostic technician...
so power to switch is not there?
at the switch?
then check fuse f22.. if power there it wiring to switch is pinched or open circuit
from fuse to switch..... don any recent work incide the car? check where you were working for pinched wires or screws through wires etc...
so the power from the fuse goes straight to the in cabin switch? if thats the case il try running a new wire and see if that fixes the problem? basically. i bought the car and it had no cd player. you can see the dash has been off before.. and the aircon didnt work.
diagnostic technician...
power goes (working in + to -)
from battery to
ignition relay to
fuse f22 to
ALL a/c switches to
pcm (ecu) to ground (battery)
so in the above diagram all a/c switches must work for the A/C ON signal to get to the PCM
Posting Permissions
LinkBack URL
About LinkBacks
Reply With Quote