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The ac in my car wont go on. i thought it was electrical but checked the fuse and wiring and nothing seems out of place. wat else could it be?

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Automobile A/C have a low pressure cut out switch. If all the electricals are good then the gas has leaked out and that means there is a leak somewhere. Eric

Posted on Jun 19, 2009

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My 1999 Astro Van AC does not turn on. Good fuse,relay but gets no power to the switch into compressor.Can it be the heater/air condition control panel.


My first thought is, your low on refrigerant.
Checking fuses is good, also, use a test light and check voltage on fuse circuit. Some fuses are hot all the time. Some go hot with key on. I see three fuses involved and a/c enable relay.
Sometimes you can take electrical connector loose from compressor and use jumper wires from the battery for voltage and ground, just to see if compressor clutch will engage. The dark green wire is voltage, the black wire is ground.
hvac-urigmsvnv3drxichwubpukd1-5-0.jpg

Apr 29, 2018 | AC Cars & Trucks

1 Answer

Timing belt was changed. Now AC wont kick on. CHanged relay..nothing will kick on when jumped


I presume you changed it? Tripple check your work. Something was not put back right or wire/s were disturbed. There may be a
fuse on the wire to the AC Compressor's clutch.

Mar 16, 2015 | AC Cars & Trucks

1 Answer

Pwr surge took out alt, windows guages blinkers, wipers,heat and ac


Hi S, It seems to me that the surge may have been caused by the alternator before blowing. A short circuit may has caused the diodes to blow, which in turn will probably have been caused by a short circuit created when the radio theft took place. The first thing to do is isolate all loose cables and make sure that there are no internal shorts inside any auxiliary equipment. After making repairs to the alternator, or fitting a replacement, disconnect all connectors to switches and other controlled units such as cabin heating and ventilation systems, music, TV and navigation systems. The fuse box is located in the engine compartment. Check all for continuity and replace burned fuses and at the same time, check for any damaged relays. Once are you satisfied everything is as it should be turn the ignition key to auxiliary and check all cables for overheating. Connect each unit one at a time until a fuse blows or all are connected. If a fuse blows while connecting, replace the fuse, but leave that circuit disconnected and continue until all are connected or another fuse blows. Once the dangerous circuits have been identified, trace the fault either into the wiring harness or the units. Repair if possible or replace. Once that has been done, crank and start the engine. Check all circuits with the engine running and the park brake fully engaged. If the engine fails to start check the electrics which operate the starter motor. Hope this info is at least a little helpful. Regards John

Apr 17, 2014 | 2004 Toyota Corolla

1 Answer

Car wont stay Running,Door wont Lock-Unlock, Radio dont work and Trunk Pop don't work


It appears that you have an electrical short somewhere. If you are mechanically inclined and have hours of time and electrical knowledge, good luck! Sometimes these problems can be easily found where the wiring harness runs through the firewall from the fuse panel under the dash to the engine compartment relay box. Vibrations of the engine over time on a vehicle over 10 years old will chafe the wires over time on places where the wires lay over body frame components. Also heat and time on a cars wiring harness over a decade can damage wiring in the engine compartment or along exhaust manifold underneath. Try looking in those places for visible damage before tearing out all the interior or dash.

Apr 23, 2012 | 2001 Pontiac Grand Am SE

1 Answer

Nissan Altama Starter Relay electrical problems or a fuse?


Or the battery cables ! Do you know how to use a voltmeter ?
Starter Voltage Drop
Do you know how to do basic automotive electrical testing ?
How to voltage drop test starter motor circuit
Electric Testing Techniques You Need to Know Here is a place to view wiring diagrams ! http://www.bbbind.com/free_tsb.html


Apr 08, 2017 | 2004 Nissan Altima

1 Answer

My AC Switchs wont turn on but the ac is fully charged and the fan works changed the thermostat and still the ac wont work..please help!!


The Thermastat has nothing to do with your AC becoming on at all because the Thermastat has to do with radiator fluids going into the engine to keep its high temperatures in check not your AC. You need to check the connection of the switch with a multimeter to see if current is getting to it and it is not then check the fuse for your AC in fuse box so see if this fuse is blowned. If the fuse is blowned tells me that there is a short in the wiring to the AC switch.

Jun 10, 2011 | 2005 Hyundai Elantra

1 Answer

Alrite my cousin was putting my battery in an hooked it up backwards n i replaced the battery n alternator wat should i checknext cause it wont stay running cause the battery dies somehow


Check the main fuses in the power distribution center. If they are all OK you will need a dealer or good electrical shop to sort things out. You may have a burned wire, failed computer (regulates voltage through there) or many other things wrong that take lots of experience (and equipment) to find.
Putting a battery in backwards does not seem like a big problem but in computerized systems it is.

Dec 04, 2010 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Computer and radio flashing


2 things 1st i would try disconnecting the battery for about 10-20 minutes se if that fixes your problem if not the second thing is to replace the computer panel screen,hope this helps

Jun 22, 2009 | 1993 Jeep Grand Cherokee

3 Answers

Car won"t start..acts like the battery is dead .


possibly the alternator. or even a bad connection on one of the wires

Jul 19, 2008 | 2000 Kia Sephia

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