1997 ford f-350 7.3 power stroke, ac not working, a/c plug connector damaged when belt came off, have replaced pigtail connection, ac is not working now, tested wires before and after diode ,ac connector and pressure switch ,none have any power, reverse tested and all wires show they are grounded.ac fuse test good
The schraeder valve is self contained and the switch can be removed without loss of freon or the need to recharge. Just pop a new one on and away you go.
Disconnect the battery to reset the ac,make sure there is freon in the system,and enough to activate the clutch coil.
Disconnect the battery negative side ,for about 25 seconds,then reconnect,this will reset the ac system.Be sure there is enough freon in the system,or it will do this again.
Like I said,make sure there is enough freon,un plug the compressor,and see if you can get voltage then,if so,then the ac clutch coil is shorted.See if there is a high side pressure switch on the rear of the compressor,make sure it is connected,and not damaged,if so,it will not complete the circuit.A good way to test the clutch,and check to see if there is enough freon in the system,is to run a positive wire to the compressor,and let it run,to make sure it is cooling real good,and of course ,this will let you know if the clutch coil is good.Let me know how you come out on these test,I am going to look at a schematic at work,I will be back in4 hours,I will check in then,but you can let me know your findings meanwhile,ok?
Replacing the diode with a fusible link,does not make sense,but if you are going to replace it with a fusible link,NAPA has them ,any size shape or form.The diode allows the dc current to travel one way,and one way only,this is installed to keep the coil from generating voltage backwards to the ignition,in hope when turning the engine off,it does not try to stay running.Did you look at the rear of the compressor for the high pressure cut off?There may not be one,but thought I would have you check ,just the same.Find the low pressure cycle switch,and unplug it,use a wire to connect the two wires from the connector,that where plugged into the switch.In other words,you are by passing the switch.See if the compressor will activate.There are two wires on the high pressure switch also,see if you can by pass them the same way,these have ground going threw them.Try this and let me know,cause these switches will not allow positive voltage to flow to the clutch coil.Does the blower motor work fine,on all speeds?Let me know something,I am trying to help,
Another thing,you will have to start the engine,and turn the ac on,to test this system,or it will not activate the ac clutch.
Well?Have you done these things yet?I am trying to help you the best I can,let me know something.
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I recommend that you look in the yellow pages under autoelectric repair shops. These shops have all of the diagnostic equipment necessary to find this problem with out any guessing involved.
You will be up and running again in no time and you will not have wasted any time and money unnecessarily. J.
When the plug became damaged, it may have shorted out a wire further on down the line, also it may have damaged the main fan relay, this controls most of the engines main electrical components. Good luck and let me know if i can further assist! HOPE THIS HELPS!
Does the AC relay click when you turn on the switch. You should hear and be able to feel it click. If it does not then chances are the connector shorted taking out the AC commamd part of the PCM. A simple test with a diagnostic scanner can activate the command on the PCM. If it fails to then the PCM is bad.
Is the electro-magnetic clutch on the compressor drive pulley pulling in?
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Inspect
Coil - Ignition
Damaged or faulty ignition coil or ignition coil circuit.
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Inspect
Fuel Filter
Clogged or dirty fuel filter
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Inspect
Fuel Injector Pressure Regulator
Faulty fuel injector pressure regulator or circuit.
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Inspect
Fuel Pump
Improperly functioning fuel pump or circuits.
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Inspect
Wireset
Damaged, worn, or deteriorating spark plug or coil wire(s).
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Inspect
Control Module-Ignition
Faulty ignition control module or circuit.
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Inspect
Solenoid Switch
Damaged or faulty solenoid switch or solenoid switch circuit.
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Inspect
Starter
Damaged, worn, defective, or faulty starter or starter related circuit.
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Inspect
Neutral Safety Switch
Damaged or faulty neutral safety swittch or circuit.
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Inspect
Fuse
Corroded, burned, or shorted fuse may be interupting power source.
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Inspect
Fusible Link
Corroded, burned, or shorted fusible link may be interupting power source.
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Inspect
Battery Cable
Corroded, broken or poorly connected battery cable.
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Inspect
Spark Plug Wire Loom - Performance
Improperly adjusted or worn/malfunctioning carburetor.
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Inspect
Distributor Cap
Loose or cracked distributor cap
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Inspect
Distributor Cap And Rotor Kit
Loose, cracked, or worn distributor cap and ignition rotor.
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Inspect
Fuel System Pressure
Incorrect fuel pressure being delivered to carburetor or fuel injection system.
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Inspect
Fuel Injector
Plugged, dirty or poorly connected fuel injector.
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Inspect
Ignition Switch
Worn, damaged or faulty ignition switch or circuit.
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Inspect
Spark Plug
Fouled, damaged or broken spark plug(s).
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Inspect
Belt
Incorrectly routed, adjusted(tensioned), missing or worn drive belt(s).
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Inspect
Timing Belt
Slipped or broken timing belt.
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Inspect
Timing Set
Slipped timing chain or worn timing gear(s).
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Inspect
Fuel Tank
Contaminated fuel from rusted or deteriorated fuel tank.
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Inspect
Ignition Timing
Incorrectly adjusted engine timing.
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Usually answered in minutes!
not pulling in,no power to clutch
not pulling in no power to clutch
i have not received any response,any ideas
1997 ford f-350 7.3 power stroke, ac not working, a/c plug connector damaged when belt came off, have replaced pigtail connection, ac is not working now, tested wires before and after diode ,ac connector and pressure switch ,none have any power, reverse tested and all wires show they are grounded.unpluged from compressor,all still show no power,and all wires show grounded,ac fuse test good
relays clicking, 4 relays across back of distribution box, 2 relays clicking when turning a\c switch on and off
left batteries unhooked for 20 minuets, still no power to a\c compressor ,test wires with test light, all wires still showing grounded , to compressor plug and a\c pressure switch.
i have check coil a\c working fine before a\c connector damaged,rechecked coil,still working fine,with a\c connector pluged or unpluged ,no wires show any power, When reverse test each wire ,all show they are grounded, have check relays,they click when turning on a\c switch, have moved around relays also.Wires from compressor plug and pressure switch run back in wiring harness about 6" back there is a plastic shield on harness with tag that says dioade, have checked wires on both side of diaode, and they are showing all wires grounded,before and after.Checked with local ford dealer,they could not find any diaod in harness,suggested go to auto-parts store and get fusible link ,to put in place of diaode .parts store does not carry such item.do not know if that would be the problem or not.
will try these items,and let you know
Jumped across pressure switch on accumulator , compress kicked on.so do i have to evac and recharge to replace switch or does it have a schrader valve or something to keep system pressurized?assuming switch got shorted out.
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