A simple test is done using a bench top power supply with adjustable voltage, 3A or more current capability, a voltmeter and 12 volt bulb. The bulb is placed on the regulator FLD terminal, the other terminal on ground (regulator case). The power supply (+) is connected to regulator IGN, (-) to regulator case.
Test as follows: Use meter to monitor voltage at IGN to regulator case. Set supply voltage to 12V, the bulb, should be lit, increase voltage slowly, the bulb will go out when the voltage is increased to regulating point, typically a few tenths around 13.8V. The bulb should turn back on as voltage is reduced, a bit below the regulating point.
For new two field terminal regulators, the bulb is connected from FLD terminal to (+) power supply, not ground as in early regulator test.
A simple test is done using a bench top power supply with adjustable voltage, 3A or more current capability, a voltmeter and 12 volt bulb. The bulb is placed on the regulator FLD terminal, the other terminal on ground (regulator case). The power supply (+) is connected to regulator IGN, (-) to regulator case.
Test as follows: Use meter to monitor voltage at IGN to regulator case. Set supply voltage to 12V, the bulb, should be lit, increase voltage slowly, the bulb will go out when the voltage is increased to regulating point, typically a few tenths around 13.8V. The bulb should turn back on as voltage is reduced, a bit below the regulating point.
Hi Dave, how the heck, are ya?
For new two field terminal regulators, the bulb is connected from FLD terminal to (+) power supply, not ground as in early regulator test.
Egag, Mouser, Digikey, the smaller electronics supply, houses..........or find an old rheostat. You happen to have an alternator/ generator test set?
18V 3 A Bench Power Supply | MPJA.COM
30V 5A Digital DC Power Supply Variable Adjustable Lab Bench Test Equipment Tool 743828299538 | eBay
BUT BE CAREFUL. This one is not "variable" but rather "selectable".........it has SWITCH POSITIONS
PS-28A | ADJUSTABLE VARIABLE POWER SUPPLY BENCH DC OUTPUT 12V 9V 7.5V 6V 4.5V 3V 744633428489 | eBay
This little kit will give you 1A output which may or may not be enough
Variable Power Supply Kit | Alltronics
Found this on "E" Bay DC POWER SUPPLY QW-MS305D, will this work??? Thanks