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Hi Kelly, A fully charged battery is 12.4 to 12.6. and when the motors running it's 14.3 to 14.6... Three reasons your battery is flat (isn't charging), You have a faulty battery, A power drain or you have a faulty alternator... Clean your battery terminals and If you don't have a multimeter then Try jump starting your flat battery and driving your car for at least ten minutes then turned the motor off and try starting it WITHOUT jump start, If the battery's still flat then it's the battery, If your car starts straight away but won't start the next day then you have a power drain... If you jump start your flat battery and go for a ten minute drive but during that drive the motor dies without turning off the key then it's the alternator....
A mechanic or an auto electrician can usually test Free of charge if you can get it there....CHEERS..
Sounds like the system is pulling too much power! First check the charging system and battery! With the key off, your battery should be at 12 volts or better! When you start the van, check for 13 1/2 to 14 volt charge at the battery! If that checks out good, next you want to plug in an OBD2 code reader under the dash on the driver's side, and check for codes! If there are no codes, it could be the system itself having the problem!
i would think it might have more to do with the alternator charge rate ,as the A/C use a lot of engine power so the other components get reduced power from the engine ,so the alternator raises the power to the battery and so to the other electrical components,if the charge rate is low the engine can die ,does it start ok when A/C is turned off ?
It's your alternator that may be the problem. Your thinking of the battery is wrong because everything on a running car is run off the alternator. Only if the alternator dies will the car continue to run off the battery-but not for long if any accessories are used. So the alternator runs everything AND recharges the battery until it is needed again to start the car. Your alternator is barely keeping up with running the car, and is not apparently doing much to recharge the battery. Have the alternator tested.
I would not say for certain it is the alternator-there may be a problem in your a/c circuit. But first test the alternator...BTW, Kinsha, pulling off the neg. cable to check an alternator is as old school as me, but on modern electronics it is considered bad practice-electronics don't like little surges or peaks of power. Buy an inexpensive digital multimeter-it is fun learning as you go.
you need to check the charging system voltage if the alternator is not putting out voltage the car is only running off the battery and the battery is not being recharged turning on the ac adds the drain from the cooing fan about 30amps and the blower motor inside the car another 20 amps and also the compressor clutch of 20 amps
the alternator may of went bad and stopped charging so the car died when the battery went dead. Charge the battery and test to start with. Are you saying wont turn over ot turns over and wont start. If it turns over and wont start then it could be several things. Will need to get it diagnosed to be sure
I don't tjink your a/c is directly killing the engine. The electrical load it demands may be the issue. Hve your battery checked and your alternater outout. The alt. is supposed to ofset the loads imposed on the battery so as not to ppermit the battery to drop below what is needed to satisfy other accessories which are on orrunning. The charging voltage output of the alt is 13.6 - 14.2v @ 13,6v the alt is charging near its capacity. and 14.2 it is backing off. The lower the voltage the higher the amps. Constantly running @ or below 13.6 will shorten the lufe of the alt due to hear builup damage. Have your battery load tested w/engine off. Then ck the alternater output engine running @ 800 rpms. Alternaters, unlike the old generators, charge from the minute it starts turning, where a generatoter has to have speed to generate anything. Watch what the alternator does when you turn the a/c on and off. or simply watch the battery readinsgs when you turn each accessory on. like the headlights... Good Luck
u need a 134a charge hose ,on ur car look for the ac compressor and find the large ac line/hose and follow it around to the small ac service port,this is the low side port connect to it and tap the can at the othe end and start car turn the ac on high an d high blower motor,and recurculation if it has it and max air start charging
if you can charge the battery and drive it for a while then sounds like the altenator has failed and is not re-charging the battery, good way to test is to charge the battery, start the car and turn the light on, if everything is dimm or the motor dies there is little to no charge voltage, and will require altenator work
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