How To Test Alternator With External Voltage Regulator. In a nice 70 F 21 C day you can expect a voltage regulator charging your cars battery at about 142 volts. An easy is to check the physical layout of the pins on the alternator.
Simply put the regulator restricts the amount of voltage being sent to the battery. Course if it was in MY garage Id pitch the external-regulated alternator in favor of an internal-regulated unit--probably a 12SI. If the alternator produces low voltage and when full-fielded suddenly produces maximum voltage the regulator is at fault.
The regulator controls the voltagecurrent fed to the rotors electromagnet coil windings through terminals D- and DF to provide an output voltage at the D or B terminals of about 145V.
I have some rad projects coming up dont forget to subscribeHow to perform a voltage regulator bypass jumper test on a classic GM cartruck. Most of these regulators contain three electromagnetic switches referred to as the cutout relay the regulator and the current regulator. A vehicles electrical system generally operates on 12 volts -- too much voltage and the fuses blow. Without a regulator the battery would receive upwards of 30-volts of power while charging which would quickly damage or destroy your battery.
