[trit21]

I will assume at this point the air heaters, switch behind the steering wheel is off. If on, they take a lot of power so that may be the problem. If you find the regulator and have a manual to troubleshoot then you can determine the problem, i.e. alternators, regulators, wiring issues etc. Bascially there are 2 regulators stacked on top of each other, made for Tiara but quite easy to troubleshoot if you have a DMM and manual. I have it if you need it and the people at Charles Industries (maker of the regulator) are great to work with and very very helpful.