A/C problems, need suggestions...
03-28-2012, 03:51 PM
#31
What that tells you is that either the HVAC isnt comanding it on for some reason or there is a bad connection prior to the relay. (the fuse block gets replaced from time to time for failed terminals) On the upside your compressor is ok.
03-28-2012, 04:45 PM
#33
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Yea,, if he commands it on, and it turns on..
Then there might be a problem with the HVAC controls or a bad pressure sensor?
Should be able to check pins 85 or 86 for a signal?
Then there might be a problem with the HVAC controls or a bad pressure sensor?
Should be able to check pins 85 or 86 for a signal?
03-29-2012, 08:39 AM
#36
03-29-2012, 09:33 AM
#38
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Woops.. should have mentioned that..
Pin 30 should have power
pin 87 should be outgoin power to the AC
---------------------------------------------
Pin 85 should be ground
pin 86 should be signal
---------------------------
those could be backwards, its been awhile since i looked at a diagram.
so 30 and 87 can be swapped, same goes with 85 and 86.
30 or 87 should have 12v+, with the opposite goin to the AC Comp clutch
85 or 86 should be ground with the oppostie side 12+
on 85 and 86, if one is grounded and the other has 12v+ then it triggers and makes contact between 30 and 87.. so both sets can be swapped and it still works...
make since?
03-29-2012, 10:20 AM
#39
Woops.. should have mentioned that..
Pin 30 should have power
pin 87 should be outgoin power to the AC
---------------------------------------------
Pin 85 should be ground
pin 86 should be signal
---------------------------
those could be backwards, its been awhile since i looked at a diagram.
so 30 and 87 can be swapped, same goes with 85 and 86.
30 or 87 should have 12v+, with the opposite goin to the AC Comp clutch
85 or 86 should be ground with the oppostie side 12+
on 85 and 86, if one is grounded and the other has 12v+ then it triggers and makes contact between 30 and 87.. so both sets can be swapped and it still works...
make since?
Pin 30 should have power
pin 87 should be outgoin power to the AC
---------------------------------------------
Pin 85 should be ground
pin 86 should be signal
---------------------------
those could be backwards, its been awhile since i looked at a diagram.
so 30 and 87 can be swapped, same goes with 85 and 86.
30 or 87 should have 12v+, with the opposite goin to the AC Comp clutch
85 or 86 should be ground with the oppostie side 12+
on 85 and 86, if one is grounded and the other has 12v+ then it triggers and makes contact between 30 and 87.. so both sets can be swapped and it still works...
make since?
When I have time, I am going to run it by Lloyd-TX's shop, which is actually only about 2 miles from me, and have him hook up a Tech2. I know it would have been easier to do that from day one, but I am a curious kind of guy and really enjoy learning how things work (and hopefully fixing it myself).
03-29-2012, 10:41 AM
#40
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Yeah, I get it, I think. So by completing the circuit between 30 and 87, I've tested that one supplies power and the other runs uninterrupted to the compressor. Now I need to test that there is a ground and also voltage coming to trigger the relay. I'm guessing I need to bridge the low pressure switch again as I think that would prevent the trigger voltage.
Yep,, completeing the circuit with a jumper from 30 to 87 your taking everying out of the system.
i think the pressure switchs are on the trigger side, not the power side.