Yea i'm checking it at the battery when it's running you can take the cable off and it will keep running as long as you rev it up a little but at idle it will run for a min. and die but i do have the fans running and has a msd to.........
DO NOT FECKING EVERY DO THIS!!!! And here is why this is a waste of time:
1....Let's say your alternator is good, is working perfectly and able to put out it's rated power. You pull the cable and the engine quits, you conclude "alternator is bad." Why? Maybe the engine was running slow enough that the alternator wasn't putting out any/ much power
2....Let's say a "couple of diodes" are bad and that the alternator is outputting enough to operate the engine but little else. You take the cable off, the engine continues to run, and you conclude "alternator is good." Maybe your 50A alternator is only putting out 20A max
3...As suggested earlier, taking a battery cable off a running engine can cause a HUGE HIGH VOLTAGE SURGE because the voltage regulator is "hunting" for the battery voltage. This can damage electronics.
YOU WILL NEVER EVER FIND this "test" in any textbook or service manual anywhere
