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When bad battery cause dc car voltage ok. cause ac volt on car running show what ac volt is ok?
Wiki User
∙ 14y ago
Vehicles run DC. 13.5 - 14+ volts at battery is o/k. Shows alternator is charging but won't tell you amp output. If the battery is bad you will wear out the alternator as it trys to keep a bad battery charged (it will work itself to death)
Wiki User
∙ 14y ago
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How do i tell the voltage of my lawn tractor battery?
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What is wrong if the battery light is on in a 1999 Ford Expedition and it has 11.5 volts at battery and you replaced the alternator and it dies if the battery cable is pulled while running?
Check out the battery cables. Make sure that they are connected good and not corroded or damaged. Also check the connections at the alternator. I had a 97 Expedition with a battery indicator, 12.4 volts at the battery with the engine off and 11.6v with the engine running. Replaced the alternator and then had 11.9 v with the engine running. Checked the alternator fuses on the firewall and found the 175a alternator output fuse blown. Replaced the fuse and voltage then read 14.3 with the engine running. Not sure if the fuse was blown before the alternator was replaced or not as I never thought a 175a fuse could blow without fireworks. 2 cents: Fuse..... Also check for defective replacement alternator, alternator rebuilt with incorrect regulator, damaged instrument panel cluster, or damaged or poorly connected wiring. Rocky_B Sounds like a dead battery cell. 1) Engine OFF - A servicable battery will show 12.5 volts at the terminals, anything less and you have dead or dying cells - Replace the battery. 2) Engine RUNNING - A good alternator should put out 14volts or more. 13-14volts=weak alternator, If voltage at the terminals is the same or lower after starting, your alternator might not be putting out anything or you have bad diode pairs in the voltage regulator. With most newer models the voltage regulator is attached to the alternator, so you replace both. If the voltage regulator is not attached to the alternator, you still want to replace both as voltage regulators tend to become mated to the old alternator's output over time. replacing just the alternator could cause the voltage regulator to fail.
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What does voltage do?
A 'voltage source' is a general term, for anything that can supply electrical power.It can be a battery, generator, solar panel etc.It is mentioned on schematics and other diagrams, to show where the power is applied.
What would cause battery drain overnight on a ford escort 1998?
It could be a dome light. To find out what is draining the battery overnight you need to take off the negative battery terminal and put a test light or Voltage tester between the 2 terminals. With everything off and all the doors shut or open if you have the dome light turned off, the test light or voltage tester will light up or show voltage. Go to the fuse block and take a fuse out one by one. If the light goes out when you pull a particular fuse, then that is the circuit that is draining the battery and you can take a closer look at it.
What does voltage source do?
A 'voltage source' is a general term, for anything that can supply electrical power.It can be a battery, generator, solar panel etc.It is mentioned on schematics and other diagrams, to show where the power is applied.
Will a 40 watt bulb show the same amount of brightness than a 60 watt bulb if connected to a higher voltage battery?
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When you make a lemon battery does the amount of electricity change from how deep you put the zinc screw in?
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Why would a Dodge Caravan show high voltage?
Bad voltage regulator. Replace it. Should be built in the altenator. Or just replace the altenator. Make sure you're battery is disconnected first. Also connect battery back up after you mount new altenator. Note not knowing year of van some older cars have a external voltage regulater. Which means it will be mounted someware on the firewall or inner fenderwall not in the altenator. Make sure you disconnect battery before working on any electrical. This is importent on voltage regulaters. Because they require to be pollerized. Also check battery high voltage will cook a battery.It over charges it.
