alternator putting out too much juice

[gsxrocky]

alternator putting out too much juice. Help please

I put a new alternator in my 89. It worked fine. Then I bypassed the smog pump. It started putting out 17-18 volts. Fried the battery. I thought the voltage regulator was bad. Tested alternator and it did act funny. They gave me a new one for free as well as a new battery. Got it installed and it still reads 17-18 volts. Any ideas. I don't want the battery to blow under the hood. Thanks

 

[HISSIN50]

too much alt output is a first for a fox. i dont know but am interested to see what you all think. i would be lookin for a bad diode in the alt, but if it is new and the old one did it, i dont know.
good luck.

 

[StreetStang37]

im still thinkin its your voltage regulator. maybe the new one they gave you was bad too. im thinkin you can damage more than just the battery with that much voltage.

 

[HISSIN50]

SS is right. if the amp output corresponds to the increased voltage, you could be heating the marginal wire from the alt to starter solenoid.
also make sure you have the yellow/white wire in the alt wiring. it helps regulate voltage.

 

[Black 93 Fox]

Mine did this for a while, I couldnt figure it out espicaly since I have underdrive pulleys on. So I ignored it but about 2 weeks ago it was hardly charging at all. The the next day I had to get a new alt havent had the problem since I got the new alt.

Black 93 Fox