Originally Posted by PatQuinn
hey guys my 98 jeep cherokee keeps losing power. it will start up at about 12 volts and run ok (kind of rough) but as soon as i put on the headlights and/or radio the voltage drops down to 0. If i disconnect the battery while the car is running it cuts power immediately. Does this mean it is the alternator? Also 2 of the 4 bolts on the bottom of the alternator that connect the black peice with the green wire are broken off. could this be the problem? Thanks in advance.
If you disconnect the positive terminal while the car is running, and the car continues to run then the alternator is good. If the car cuts off then the alternator is bad.