Vw Beetle Voltage Regulator Testing

Battery charging issue seems to be a common problem with our vintage british cars.

Vw beetle voltage regulator testing. This regulator generator test is performed by firing the motor and placing the red volt meter lead on the regulator peg the black on the regulator base whe. Disconnect the generator from the regulator both the df and d wires. The really early 6 volt models had the voltage regulator mounted on the generator.

Use a jumper lead to connect df to the generator frame grounding the df connection. To test your vehicle s voltage regulator you ll need a multimeter which reads the voltage running through your battery. Early alternator equipped beetles use a bosch alternator with an external regulator bos 0 190 600 017 screwed to the left wall under the rear seat.

The regulator controls the voltage current fed to the rotor s electromagnet coil windings through terminals d and df to provide an output voltage at the d or b terminals of about 14 5v. The last 3 are the ones that control d on the voltage regulator but most auto part stores have no inclination of testing them. When you have one attach the multimeter s clamps to your vehicle s battery.

1972 vw beetle voltage regulator wiring diagram wiring diagram is a simplified welcome pictorial representation of an electrical circuit it shows the components of the circuit as simplified shapes and the gift and signal links along with the devices. Here the moss motors tech specialist walk you through checking your voltag. Then set your multimeter to voltage and look for a reading of just over 12 volts.

They apply a voltage to df spin it up the alternator puts out 90 100 rated amps at b and they say it s good but that test doesn t prove the alternator is working correctly. Most of the 6 volt generators and all the 12 volt generators have the voltage regulator under the left back seat opposite side to the battery. In this video you will see what happens inside the voltage regulator and how it function.

Now start the engine and test the voltage between d and the generator frame.