Excessive parasytic load? Hidden accessory left on i.e. trunk light,underhood light, glove box light, etc. Bad voltage regulator not opening circuit on engine shutdown?
If the battery and alternator are good and the charging system is not working, then you either have loose or corroded wiring or the drive belt is slipping.
Yes. an alternator can be good but you can still have charging problems if:- 1.Battery is no good. 2.Fan belt slack or worn. 3.Poor or broken wiring connections at alternator. 4.Loose or dirty battery conections. 5.poor or broken wiring between alternator and battery. 6.Alternator rating not large enough for application.
Is it charging, if not have you checked wiring to alternator.
Disconnect the 98 LeSabre battery. Remove the alternator belt. Remove the alternator wiring. unbolt the alternator, remove it, and bolt the new one on. Reconnect the wiring, but the belt on, then reconnect the battery.
Disconnect the 1990 Regal battery. Remove the alternator belt. Unhook the wiring from the alternator then unbolt it. Remove and replace the alternator then reconnect the wiring, belt, and reconnect the battery to finish the installation.
wires are crossed or you have a short in the wiring from the alternator to the battery.
The battery light comes on when the alternator output voltage is too low or too high. You have a wiring or regulator problem.The battery light comes on when the alternator output voltage is too low or too high. You have a wiring or regulator problem.
Disconnect the battery. Remove the alternator belt. Disconnect the wiring on the alternator, then unbolt and remove the unit. Bolt the new alternator in place and connect the wiring. Install the belt and connect the battery back up.
Defective alternator or bad wiring.
Is the battery dead? Check for 12v on the main alternator cable. If no power, check for burned out fusible links between alternator and battery. You may need a wiring diagram to check further.
The fuse between the battery and alternator is a fusible link in the small wire that hooks up to the battery terminal along with the regular battery cable. It looks like a thick spot in the wiring. To replace, the cable must be replaced. .
Disconnect the 1988 Century battery. Remove the alternator battery. Disconnect the alternator wiring, then unbolt the alternator. Bolt in the new alternator, then reverse the procedure to finish the installation.