Amp light on

[Oldcoach]

Ok, so I just put in a new alternator a few weeks ago. Car was running fine. Went to start it yesterady and the fuse wire burned. Replaced the fuse wire and also put new battery in. Cars starts great but the amp light is on. I tested battery while car was running and battery was pushing 20 volts. amp light still on. HELP???

[sreilly77]

Originally Posted by Oldcoach

Ok, so I just put in a new alternator a few weeks ago. Car was running fine. Went to start it yesterady and the fuse wire burned. Replaced the fuse wire and also put new battery in. Cars starts great but the amp light is on. I tested battery while car was running and battery was pushing 20 volts. amp light still on. HELP???

The battery is overcharged. It is only supposed to be 14 volts. What probably happened is if the alternator is aftermarket, there might be a bad voltage regulator in it, which basically means your new alternator is actually bad. Take it out and have it tested at your local AutoZone to see for sure.

[Towncar]

Hey Sean -- good to see ya checking in from time to time

Oldcoach --
Yikes man !!! Get that alternator away from your car immediately.. You're not going to like the mess when the battery blows up.

[junk yard doggie]

HI guys I figured I would check in and see what was going on in the forum.

Yes I agree with Steve and Sean that alt. sounds like it's over charging. That wire that burned is a fuseable link. It is suposed to burn if the voltage gets too high. Make sure not to just splice a plain piece of wire back in there.

I'm really starting to hate the poor quality of aftermarket / remanufactured parts these days.

Good luck on geting your charging system working correctly again.

Mike