2000 trans am new alternatror no charge

Asked by Jul 17, 2012 at 08:09 PM

Question type: Maintenance & Repair

i have a 2000 trans am. went out to start the car and it started hard like the battery was almost dead. i looked at the gauges and noticed it wasn't charging it was reading about 10v so clearly it was running off the battery. i pulled the alternator and had it tested and tested bad. i replaced it installed a new one and had it tested twice just to make sure the new one wasn't defective and it tested good....still no charge..i checked the 3 fuse blocks 2 under the hood and the one on the dash next to the drives door,  but doesn't seem to be any fuses related to the charging system your help and advice would be appreciated!

6 Answers


change the wires they could possibly be fried that's where id start if i were you good luck

1 out of 1 people think this is helpful.

do a load test on the battery,sometimes if the battery is bad the current will pass right through it. go to auto zone they will check it for free.

1 out of 1 people think this is helpful.

thanks for your help so far. the battery is good and all the wiring is good as well. double checked all the fuses and everything seems to be good.i checked the wiring between the alt and the battery all good. i checked the voltage from the comp to the alt but don't have a ref to compare it to not sure what its suposed to be.

could also be a defective alternator ,its rare but it happens. sometimes you just have to rev up the engine a little to get to work . voltage doesn't go from compressor to alt. it's the other way around,with the a/c on. it should be at least 12.5 volts .

2 out of 2 people think this is helpful.

not the compressor the computer... :) the one wire that plugs into the back of the alt comes from the PCM thats what i ment. i shold have spelled the whole word...lol its all good now. i went and ordered another alt and got a new one not a reman like the first one i got. even though the reman tested good there still must've been something wrong with it. i installed the new one and works great.. weird...lol thanks to everyone that comented i appreciat you taking the time to help!


Cool , good to hear ,problem solved. glad to help.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions


Looking for a Used Pontiac in your area?

CarGurus has 14,319 nationwide Pontiac listings starting at $699.


Search Pontiac Questions

Pontiac Experts

#1 tenspeed
Reputation 11,170
#2 Tom Demyan
Tom Demyan
Reputation 8,640
#3 Js08016
Reputation 7,910
View All