alternator question?

[ryanxstang]

anyone know how to test an alternator with a dmm i did but i forgot

[lowflyn]

Nope...just pull it and have it checked at an auto parts store.

[ryanxstang]

yea thats what im gonna do i figured i could save my self the work if some knew

[DarkShadow]

A bench tester is really the best way to test one.

[jedwards242000]

put the red from dmm on the red battery cable the black from dmm on the black battery terminal and start the car see what the voltage is if its 13.6-14.2 then most likely your alternator is ok. unless your having a voltage regulator issue from the alternator. then you need it bench tested

[MonteCitan]

Quote: Originally Posted by jedwards242000 put the red from dmm on the red battery cable the black from dmm on the black battery terminal and start the car see what the voltage is if its 13.6-14.2 then most likely your alternator is ok. unless your having a voltage regulator issue from the alternator. then you need it bench tested

+1, also test it at ~2500 RPMs, with all loads on (blower motor/headlights)

Bench testing is best, but this works as well...