The voltage regulator is responsible for regulating alternator output. Look at the volt gauge in the dash. If it is too high generally that means that the regulator is bad. Take the truck to Autozone and have them check it for you. They offer this service free of charge and will do it on the truck.
Found the answer: The voltage regulator on a 98 Dodge RAM 1500 is NOT in the alternator. The alternator specifically states that the voltage is "Externally Regulated". In this vehicle the voltage regulator is built into the computer of the vehicle. To repair a bad voltage regulator in the computer you can either replace the computer or bypass the computer using about $50 in parts (ask your mechanic). Hope this helps.
The engine control module acts as the voltage regulator.
The engine computer is the voltage regulator, and yes you can replace it.
The voltage regulator controls the amount of circulating voltage. Proper wiring is required for the regulator to perform as required.
It is on the pump, in the tank.
its built into the alternator,cheaper to buy new or rebuilt alternator The engine computer is the voltage regulator.
In the tank, part of the fuel pump module.
The engine computer is the voltage regulator.
it should have the voltage regulator built into the alternator
On a 1998 Ford F-150 the voltage regulator is attached to the back of the alternator
The voltage regulator is on the back of the alternator
The 1998 Chevrolet Astro Van voltage regulator is part of the alternator. The voltage regulator cannot be individually changed. You will need to change the entire alternator.