Alternator trouble.

[dan_in_ag]

Hey everyone! So yesterday on my way to work my battery light came on. On my break my ABS light came on with my battery. It drove fine and when i went over 5k rpms the light would go off and come back on as soon as it went below 5k. So i have it narrowed down to the alternator. I drove it for the rest of the day and it eventually quite running. I checked the fuse and there was a 20a fuse but it was supposed to be a 15a. I only had a 30a fuse as a spare so I put it in and it works! Does anyone know what it could be? I haven' had time to replace it with a 15a yet but i'd like some ideas if that doesnt work. (or for someone in the future). I think it could be the rectifier bridge in the alternator but i'd like to be more sure before i start tearing my stuff apart.

 

[dan_in_ag]

btw the 20a fuse was not blown

 

[BeatBox]

hard to say, take it out. get it checked if its bad then u already have it out so replace the bish...if not then u might have another problem. only takes about an hr to take it out, i replaced mine and took me longer because i didnt know what i was doing. i replaced mine with a 300A alt and alittle more expensive lol

oh and i see u have a 92 might be different....either way u can take it to the autoparts store to get it checked

 

[pinkley]

Does your battery go dead? I had the same problem. Had the Alternator tested and it tested good but without a load on it. The way I always checked alternators was to have the car running and turn your headlights on a/c exect. Whatever draws power. Then unhook your battery. If it dies its the Alternator. If not you have other issues.

 

[Mr.Integra93]

ya i agree pull the positive off your battery while its running...and if it dies like he said its your alternator...worked for my 93 LS

 

[SbS91TeG]

Be careful pulling off the pos cable can be damaging to the ecu's best to have it tested the correct way with a vat 45 or parts store tester and also should be tested two to three time in a row to exclude intermident problems also they both put a load on alternator durning testing.