Detail: Amp Gauge goes all the way past the highest number
Solution: Amp gauge, and you forgot high number, 30, 60 , 80 , 100 amps? and did it go left or right, one way is discharge other is charging. key facts all.????? no year, no statement of , if car is stock or not. if someone added a gauge, here, back in the olden days, before the way better volt meter. they had Amp gauges, many we ADD on. most are wrong size. too. and installed WRONG. (ask correct way) if the alt dies, the ammeter goes negative amps showing disgnarge ammount, when runing right it ill be in the posative direction, charging battey or at 0amps, battery is charged. all this depends on how its installed. if put in the alternator lead (big) it will only show alternator output. 10 to 50amps, 10 is typical. 50 be dead battery, running. , Hi, a 6ya Mechanic can help you resolve that issue over the phone in a minute or two. Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!