Engine off, battery is @ 12.75 Volts. Engine on (without lights, fan, etc) battery is @ 14 Volts. When the lights and fan are turned to high the voltage drops to 13 Volts and does not come back up. I'm assuming this is a bad regulator? Anyway to make sure?
2007-08-06 03:33:34 · 8 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
I DOUBT THAT THE VOLTAGE REGULATOR IS MALFUNCTIONING BECAUSE THE CHARGING SYSTEM VOLTAGE IS CORRECT AT IDLE WITH NO ADDITIONAL LOADS.IF YOU ARE NOT EXPERIENCING ANY STARTING CONCERNS,IT MAY BE NORMAL TO ONLY HAVE 13 VOLTS AT IDLE WITH EVERYTHING TURNED ON.TRY RAISING RPM TO 1500 OR SO.A WEAK ALTERNATOR OR A BAD BATTERY COULD ALSO BE AT FAULT.YOU REALLY NEED A WAY TO CHECK HOW MANY AMPS THE ALTERNATOR IS PUTTING OUT.IF YOU HAVE A 70 AMP ALTERNATOR,THAT ALTERNATOR SHOULD BE PUTTING OUT NEAR 70 AMPS UNTIL THE CHARGING SYSTEM VOLTS ARE UP TO TARGET.A SULFATED BATTERY CAN WORK AN ALTERNATOR TO AN EARLY DEATH BY FORCING FULL OUTPUT BECAUSE IT CAN NEVER REACH 14.5 VOLTS.
2007-08-06 06:24:51 · answer #1 · answered by FORDMAN 2 · 0⤊ 0⤋
The voltage's all sound good. To properly check an alternator you need to find out how many AMPS it puts out because the alternator doesnt generate voltage just amperage. you can check your battery by seeing what the voltage drops to while it is cranking. If the voltage drops below 6 volts WHILE cranking then you have a bad battery.
2007-08-06 03:38:11 · answer #2 · answered by Anonymous · 0⤊ 0⤋
You don't have a problem,be happy,everything sounds with in specs.If you want to check bat.hook volt meter to bat have some one crank car over see if voltage drops below 10 volts under draw if not bat good. good luck
2007-08-07 02:47:16 · answer #3 · answered by Anonymous · 0⤊ 0⤋
If you measure 14.5 volts across the battery with engine running then charging system is o.k., further problems indicate bad battery.
2007-08-06 03:39:19 · answer #4 · answered by jimmymae2000 7 · 0⤊ 0⤋
you need at least 12.6 volts with a multimeter connected to your battery not your guage most auto guages are not very accurate.with engine running and lights,heater or a/c on. anything less will not maintain your battery.
2007-08-06 03:43:13 · answer #5 · answered by toive67 2 · 0⤊ 0⤋
If you take your car to Autozone or a similiar place, they can test for FREE to tell you which it is. They can test either on the car, or if you bring in the parts. I recommend doing the testing in the car when possible.
2007-08-06 03:38:26 · answer #6 · answered by BJ 2 · 0⤊ 0⤋
this can be solved by replacing you headlight pass side once that is done you battery will be at full chg. another problem solved by zorro
2007-08-06 05:40:11 · answer #7 · answered by Anonymous · 0⤊ 0⤋
those specs sound ok to me.. some dash gauges are not accurate
2007-08-06 04:02:15 · answer #8 · answered by John St.Louis 5 · 0⤊ 0⤋