SOURCE: Voltmeter drops to 9 volts on Chev 454 P30 motorhome
this is eithere a loose positive cable from the altenator to the battery or the regulator in the altenator is about to fail. if you have not had any problems starting the vehicle then most likely its a loose connection between the gauge and the charginging circuit or the gauge is faulty. take a multimeter and test the charging votage at the altenator while the vehicle is running it should measure 13.5 volts and should not change more than .5 volts. if the voltage drops more than 1 volt the regulater is bad and the altenator needs to be replaced. if it is working fine then looke for a bad connection make sure all positive and ground cables are tight. if they are replace amp gauge
SOURCE: Service Charging System
DONT START THE CAR///IGNITION ON//PRESS THE GAS PEDAL DOWN 3 TIMES SLOWLY//THEN START THE CAR. THAT RESETS THE COMPUTER AND THE CHARGING SYSTEM WARNING LIGHT.
SOURCE: I have a 2004 chevy
Chevrolet placed a recall on the instrument cluster about a year ago. take it in and they will replace cluster for free.
SOURCE: Charging system
You have a alternator with a built in regulator and its that is your problem as all alternators 12Volt charge
at 13.5 amps and can run about 12.5 when idleing but as long as it charges around the 14 while driving keep driving till you ger time to get it fixed it will be ok for a few days but get it seen to.
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