Alternators
Car Batteries

If you reverse polarity on the battery and the fuses are fine and the alternator check out ok why would an 81 Toyota pick-up wont stay on whithout having your foot on the gas pedal?

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2009-04-13 00:01:33
2009-04-13 00:01:33

When the truck is idling at low RPM, the charge supplied by alternator is not sufficient to run truck and charge battery of reverse polarity. Alternator expends majority of amperage toward charging (which never takes) and increase in RPM is required to spin alternator fast enough to accomodate ignition system and charging system in unison. When the truck is idling at low RPM, the charge supplied by alternator is not sufficient to run truck and charge battery of reverse polarity. Alternator expends majority of amperage toward charging (which never takes) and increase in RPM is required to spin alternator fast enough to accomodate ignition system and charging system in unison. When the truck is idling at low RPM, the charge supplied by alternator is not sufficient to run truck and charge battery of reverse polarity. Alternator expends majority of amperage toward charging (which never takes) and increase in RPM is required to spin alternator fast enough to accomodate ignition system and charging system in unison.

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Related Questions


Overcharging by the alternator or if it is connected in reverse polarity.

Immediate and catastrophic destruction of transistors and/or diodes. While that does not ALWAYS occur, it's certainly possible. Start with the alternator. No doubt those diodes have been destroyed if a battery has been connected with reverse polarity.

You would probably toast the diodes in the alternator.

Only if it is a battery power tool and you fit the battery in reverse.

Car battery polarity can only reverse if the battery is completely dead and then charged with the neg. and pos. leads of the charger are reversed. This is very dangerous as hydrogen gas which is given of buy a dead battery may explode and cause personal inguiry.Likewise if the car's battery cables are accidently reversed while the battery is dead. Regards - S.S.

If the battery is damaged replace it. There is no way to repair that damage.

Disconnect the 1988 Century battery. Remove the alternator battery. Disconnect the alternator wiring, then unbolt the alternator. Bolt in the new alternator, then reverse the procedure to finish the installation.

Just like anything else things just break. Have you had any electric welding done on the car? Have you used an external battery charger? Have you accidently connected the battery in reverse polarity?

What can reverse magnetic polarity

You can count on the alternator diodes being fried. But you might be able to have it tested. After that, much of the OTHER stuff has protection. Unfortunately, polarity protection is difficult if not impossible with an alternator.

Not unless you want to blow something in the electronics up...

You can't recharge it hooked up in reverse. You will destroy the battery or the charger if you try it.

"If you connected the battery in reverse that will certainly fry the alternator and cause damage to any other polarity sensitive components as well. The alternator is NOT suposed to spark, it charges by by generating alternating current which is converted to direct current through a diode pack known as the rectifier, and the voltage is regulated by some more electronic wizardry called (amazingly enough) a regulator. Normally when alternators go wrong the charging warning light will glow, and you will get the wrong readings from your voltmeter (if your car has one)."

Disconnect the battery. Take the alternator belt off. Disconnect the wiring and unbolt the alternator. Reverse the process to reinstall.

Remove the serpentine belt from the alternator. Remove the positive battery cable from the battery. Remove the cables from the alternator. Remove the wiring harness. Remove the alternator retaining bolts. Reverse the process to install the new alternator.

it depends of what accessories or electronic devices that switched the battery terminals. for ex. starter motor it will reverse the circulation if you reverse the polarity

Bad ground, Bad Battery. Or The battery was connected improperly. I.E Reverse Polarity.

Disconnect the Regal battery. Remove the alternator belt. Disconnect the alternators wiring, then unbolt and remove the alternator. Reverse the procedures for installation.

Disconnect the battery, then remove the alternator belt on the Regal. Unhook the alternator wiring and bolts, then remove it. Installation of the new unit is reverse of the procedures.

Disconnect the battery negative terminal. Remove serpentine belt. Remove bolts to alternator and positive cable at alternator and harness. Remove alternator. Reverse procedure to install.

Disconnect the battery ground, disconnect the wire from the back of the alternator which goes to the battery positive, unbolt the alternator from the bracket, detach any remaining wiring from the alternator, the replacement procedure is the same in reverse. It's a pretty simple task.

disconnect battery. remove electrical connections from alternator. remove serpentine belt. remove alternator mounting bolts and remove alternator. Installation is reverse of removal.

yes.you can get 5v output even when the polarity is reversed. In a 5v battery, if u reverse the polarity, then u'll get the same 5v as output , but in the opposite direction.(i.e.,)-5v(negative 5 volt

If you are talking about an AC (alternating current) circuit, such as the house mains supply, "reverse polarity" usually means the "hot" and "neutral" wires from the supply have been connected to something the opposite way round to what they should be. If you are talking about a DC (direct current) circuit supplied by a battery, such as in a car, "reverse polarity" usually means the positive and negative leads from the battery have been connected to something the opposite way round to what they should be.

Reverse polarity is the opposite of normal polarity. Normal polarity in electronics is when you have the positive hooked up to the positive terminal and the negative to the negative terminal. Reverse polarity would be having the positive hooked up to the negative terminal and the negative to the positive terminal. The same concept can be used with magnets.


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