Bypass Internal Voltage Regulator Alternator

The original 1960 s gm alternator employs an external voltage regulator.

Bypass internal voltage regulator alternator.

This alternator 10 dn uses a flat two prong connection at the back of the alternator. The voltage regulator driver is a chip built into the dodge pcm and can only be fixed by 3 methods 1 replace pcm 2 bypass internal pcm voltage regulator with an external one however this will have a check engine light on and a code and the battery guage. Without a voltage regulator an alternator may put out up to 250 volts. This is often called the ecc ecm eec or pcm.

If the voltage regulator in the computer does not work you can add an external voltage regulator and then your battery will charge. The other main connection on the alternator is the output terminal that charges the battery. Without a regulator the battery would receive upwards of 30 volts of power while charging which would quickly damage or destroy. Simply put the regulator restricts the amount of voltage being sent to the battery.

It also controls electrical power to the vehicle s different electrical systems. Ecm not communicating with alternator s voltage regulator. 04 30 11 10 55 pm post 2084285 i ve posted a question on my charging problems in another thread and got some good answers that led to ordering a new alternator now i m thinking about changing to a internal regulator style instead of the external type i m having now mainly because my speedshop carries the internals in stock and the external one is on order and i want to fix it a s a p. Battery is not charging.

The voltage regulator is built into the alternator on all chevys made from the 1980s to at least 2010. Since 1987 for dodge and chrysler and 1991 for jeep vehicles have external regulator alternators that are controlled by the alternator voltage control module inside the engine control unit ecu computer.