While drive the voltage guage will go to 18 volts and check guage light comes on. can shut truck and guage goes back to normal for awhile. was also in park and the truck made a pop noise and volts drop down under 8 and all lights dimmed. . question is this the voltage reg. in computer or a alternator problem?

SOURCE: Ive got a 1974 dodge

you need to find the volt. reg. and the wires from the reg. go to the alt. the field doesn't get strait bat volt. but 13 or 14 volt isn't bad, but if your wires are rite than your reg. is bad. 18 volt is to high!!!

SOURCE: 2002 Dodge Ram 1500 ,4.7L V-8 Battery is not CHarging

A lot of Chrysler products have the voltage regulator in the computer. I would check the charging system wiring first for poor connections and if nothing else is found there is nothing else for you to do but change it.

SOURCE: Headlights dim, voltage meter and other gages

sounds like the voltage regulator

SOURCE: MAY NEW ALTERNATOR PUTS OUT 14 VOLTS WHEN I START THE DIESEL 5.9

the voltage regulator is in the computer,check you battery with volt meter with engine off it should say 12volts then check it again with engine running and it should say 14-15 volts. if not the you will have to take it to a dealer to check the computer,hope this will help you!!!

SOURCE: 2000 Ram Van - is the voltage regulator located in the alternator

The voltage is regulated by the pcm (power control module ) on the truck. You cannot make any adjustments, removed or tampered with in any way to the pcm. Only a dodge dealer can check it out to see what the problem is with the pcm. Hope this will help you.