The higher /avaliable/ output of an aftermarket alternator won't come into play unless you have something that needs a LOT of current. Say for instance that your car requires 40amps at 13volts to run headlights, heater and ignition. Your 50amp alternator has no problem. If you swap that for a 100amp alternator, the car will still only pull 40amps with headlights, heater & ignition. The difference is when you get a high current load. For instance, you left the lights on and the battery is dead, now the alternator needs to provide 40amps to run your regular stuff, AND more to charge the battery. Say the battery needs 20 amps, now you are up to 60amps which is easy for the alternator but if your ampgauge and associated wiring only handles a max of 50, you're in trouble. Ideally only the fusible link should burn, but ya never know. I don't know enough of the insides of the gauge to tell if there's something there that can be cleaned, but if you get heat, there is resistance somewhere. If you are looking to bypass the ampgauge or atleast read about it, check the technical info part of my webpage. Carl http://www.robdiesel.com ----- Original Message ----- From: <Oneof514@xxxxxxx> I am having trouble with the ammeter gauge on my 66 Imperial. The plastic gauge housing is melting! The meter leads and the wire leads are corrosion free and the connections nice and tight. My alternator is a later model replacement that has a higher output than the original 1966 model. Is this the cause of my trouble?