No fuse in the alternator circuit. To check the output first put a volt meter across the battery, fully charged and healthy it should show over 12.2v _ if it's below 12 then it's goosed. Start the engine and measure across the battery again. When you read the voltmeter this time, the voltage should go up to at least 13. If varying the RPMs causes the voltage to fluctuate between 13 and 14.5 volts, your alternator is OK if, on the other hand, the voltage remains the same or decreases, your alternator isn’t working properly. Repeat the process with the lights etc on, the alternator is charging if the battery voltage stays above 13 volts with the engine at 2,000 rpm and all accessories on.
Have a look at the fan belt too, it could be slipping. Just a thought - have you changed any of the dash lights for LEDs? The ignition light needs to be a conventional bulb, to add a little resistance on start up, for the alternator to start working.