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Mystery wires

One of the green wires rings out to the AC clutch two prong connector on the green wire side. Not sure what this tells me..... not sure if it is ringing out to that because its a common or not...

one green wire has continuity to ground

One green wire has no continuity to ground

If I hook either one of the green wires to my negative lead on my tester and take the other lead to the positive on the battery they both show 12v

I would have expected both to ring to ground being that they both produced 12v to the positive of the battery
 
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Kain said:
do you still have the cruse control stuff under the hood?
Click to expand...

yes....

So I am not sure what has changed... One green wire rings to the ac clutch connector and the other green is ringing to the possitive of the battery... I am beginning to think it is the power for the AC clutch fan and the two green wires should be connected together...

Need wiring diagram for AC system...
 
Kain said:
can you get a pic of where your ac compressor is and post it
Click to expand...

Yes... I can put a photo buck link up.....I cant seem to figure out how to have the photo show....give me a few moments... In the mean time if your in front of the motor looking at the engine its on the left or passanger side.
 
the other thought that I have and I am not sure of is I beielve the truck probably had smog stuff and I dont see it any more.... Not sure how that plays in to the role...
 
smog pump would have been below the ac compressor,follow the wires off your ac comp. and see if they are connected,should be a plug in the middle of the firewall.

i know it would be a pain to unwind all that crap but might be worth a look
 
So are there still green wires on the A/C drier switch?
 
Kain said:
smog pump would have been below the ac compressor,follow the wires off your ac comp. and see if they are connected,should be a plug in the middle of the firewall.

i know it would be a pain to unwind all that crap but might be worth a look
Click to expand...

So you are thinking there is a plug in the wire loom back along the firewall or behind the distributor some where....

How about this thought process.... When the truck is on, and I am calling for ac, what should the connector at the compressor have? Right now the compressor will not run, I have not gotten to that as of yet. It is low on freon but I would assume the connector should have voltage? I need that schematic or direction on testing that?
 
Justin Fleming said:
So you are thinking there is a plug in the wire loom back along the firewall or behind the distributor some where....

How about this thought process.... When the truck is on, and I am calling for ac, what should the connector at the compressor have? Right now the compressor will not run, I have not gotten to that as of yet. It is low on freon but I would assume the connector shuld have voltage? I need that schematic or direction on testing that?
Click to expand...
Dont know have to look it up
 
Justin Fleming said:
So you are thinking there is a plug in the wire loom back along the firewall or behind the distributor some where....

How about this thought process.... When the truck is on, and I am calling for ac, what should the connector at the compressor have? Right now the compressor will not run, I have not gotten to that as of yet. It is low on freon but I would assume the connector should have voltage? I need that schematic or direction on testing that?
Click to expand...

Working off my old memory, power should go to the connector on the compressor, then to the switch on the dryer, then to ground. Also have power to the fast idle solenoid on the carb, or back to the computer on a FI motor.
 
My memory is the opposite - green wire is hot from the HVAC switch to the cycling switch (when an A/C mode is selected). Then the other green goes to the clutch and the other wire from the clutch has a ring terminal to chassis somewhere. If the freon is low, that second wire will never be hot. That's the pre-TBI setup, though.
 
no, Blue85 you are correct... like I said I am old! Posted a link to wiring in his other thread.
 
So I am confusing my self a little, when I check continuity from the lt green on the pressure cyling switch to one of my mystery wires I get continuity as long as the ac clutch connector is connected...I am not seeing how that is happening based on the schematic as the light green wire goes to the relay and I would have expected this condition on the dark green wire at the cycling switch
 
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