PD Type Regulator for a Vehicle

These are the facts to find out in order to set the parameters for PD testing:

1. % range of pulse width signal from vehicle to PD regulator

2. Frequency of pulse width signal, is there a range from regulator to regulator, or is it fixed?

3. Peak on voltage of signal

4. How much current is needed to emulate the signal from the vechile?

5. What load is required to drive the field 0.5A; 3A; ?