The original alt. seized Sat. night, so I got a new one Sun, now it wont hold a charge...any suggestions??

The original alt. seized Sat. night, so I got a new one Sun, now it wont hold a charge...any suggestions??

Alternators don't hold a charge. ;)

Do this w/ a multimeter:

1- measure battery voltage, it should read at least 12v. If not, then it's probably the battery.
2- with all acc. off, have somebody start car while you're measuring battery voltage. Battery voltage shouldn't dip below 10v. If it does, then it's probably the battery.
3- while the car is running (with all acc. off), measure battery voltage. It should read at least 13v. If it does not, then the alternator isn't working.

Michael.

I meant the battery, lol..thx I will try those

The alternator was tested and works fine and I out the battery in my moms truck and it charged perfectly..what else could it be

how do i check to see if there is power going to the exciter? if there isnt how do i fix that?
is it on a relay or what.

all fixed. the new alternator i bought wouldnt energize. i put another new one on and it worked.
oh well. thanx for your help