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Re: ac clutch going out on 93 dodge dakota
If the clutch is noisy from a bad bearing then don't drive far,if the compressor clutch pulley bearing seizes up it will freeze the pulley and the belt will burn off, and you are stuck, if you mean the anything else besides this drive it.
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I passed this question the first time I read it, so I will take a stab at it now. The fans don't come on until the compressor has pumped the freon pressure up to say 150 or 200 psi. And the compressor clutch has to have voltage to engage the clutch. I wonder if the clutch is going and needs 14 volts instead of 12 to engage ? Or the relay that powers the clutch ? Speeding up the engine would increase voltage from the alternator. This is assuming the serpentine belt is tight and everything else is working correctly. I think I would swap the relay with another and put a meter on that circuit to the ac clutch to see what it takes to engage it.
I have a 92 Dakota with a 5.2 (318) 4x4, automatic trans. You can simply remove the ac compressor and go with a belt a bit longer then what stock non AC calls for. The idler pulley is in a slightly different location from AC to no AC engines so just getting the non AC belt won't work. I used a 5070900 / 7PK2285 for mine and it worked fine. Just a touch tight getting on. Next time I'll probably go 1/2 inch longer so a 5070905. I'm a licensed tech with 20 years in the trade in Canada, 4 years of that with a Dodge dealer.
Remember that when you THINK the AC's off,it's really not.Almost all cars have the AC compressor actuate every time you set the dial to `defrost' or `mix' positions. On a TAURUS there are only two positions(maybe three)which DON'T kick the AC on.On some cars,that's the 11 o'clock and 2 o'clock positions on the selector.
SO...........the odds are that the compressor magnetic clutch or wiring to it has shorted.Because you really have power going there even when you think you don't. (:^) don-ohio
If you do not have enough refrigerant in the system. The low pressure switch will prevent the compressor from engaging to avoid damage.
Check your pressure.
I don't recommend this, but you may need to jump your low pressure switch to get the compressor going to add more refrigerant to the system. But if your low on charge, it may be "best to take it to a shop to have them fill the system".
Check the high side ac clutch cut out switch,witch could be in back of compressor,or in a high side line.By pass the switch to see if the compressor will come on.Also the ac module could be gone out.First check the ac clutch relay,or better yet swap it out with a relay just like it,same number will be on the relay,this will tell you if it is the relay.
It could cause the A/C problem but not the heater problem. You can determine if the compressor is bad with a set of A/C manifold gauges. If you don't have access to these, you can do a quick check on the compressor. Do this by feeling the two lines going to it when it is running, One line should be hot to the touch and the other should be cold. Both problems could be caused for a temp actuator or temp door problem.