dual batteries drain quickly
Dual 12 volt batteries drain and are dead within 6 hrs. Everything seems to work correctly boondocking and on shore power. while boondocking the batteries will go dead within 6 hrs. I put new batte...
Forum Discussion
mike-s wrote:theoldwizard1 wrote:Define what you think is the difference between PCM and regulation, and what you thing "the PCM" is, because the normal meaning is that pulse code modulation is a method, not a thing.
On almost all light duty vehicle built in the past 10 years, alternator charging (i.e. output voltage) is controlled by the PCM, NOT the "regulator".
PCM is usually taken to mean Powertrain Control Module.
Newer vehicles have adopted the European model of using lots of very light gauge wire as control circuits and then have relays as part of system control modules located close to the load itself.
Mine as an example has 4 such modules, one for all rear lights (including trailer wiring), one for front lights, one for the powertrain and one for all the interior and body functions.
This is in addition to the vehicles ‘brain’ itself.
