Troubleshooting alternater for 1997 nissan sentra - alternator is good and battery is good also ,but it still will not keep the battery charged while running
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simple solutions: battery won't accept the charge: take to orielly's and have them test both your battery and alternater. take both pos and neg terminals off and clean them, with coke-a-cola if you have nothing else. check the connection to your alternater to see if it is loose? good luck.
SOUND LIKE BAD WATER PUMP.IF BATTERY LOW CHARGE LIGHT ON WATER PUMP BEARING COULD BE LOCKING UP DRAGGING DRIVE BELT DOWN ENOUGH TO SLOW DOWN ALTERNATOR TO KEEP BATTERY FROM CHARGING.REPLACE WATER PUMP AND THERMOSTAT.CHECK COOLANT LEVEL SEE IF ANTIFREEZE IN RADIATOR IS LOW. IF SO FILL COOLANT SYSTEM BACK TO NORMAL LEVEL SEE IF WATER PUMP WEEP HOLE LEAKING WHILE ENGINE RUNNING IF SO WATER PUMP IS BAD.
These lights will come on if your alternator isn't charging fully. With a multi meter test your voltage at the battery with the engine running. The voltage should be above 14 volts. If it is below 14 you will need to replace the alternator.
are you sure the alternator is good? because it could be tricky ...The only other thing is the wire running back to battery pack to charge battery maybe disconnected
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