Old ERL pump control

[benstian]

Hi,
How is the old ERL pump controlled? PWM, if so what frequency and dutycycle?
Do I need a PWM relay, or is it built into the pump? (3-wires. 2 thick and 1 thin)
How much does the pump flow?
Want to experiment on variuos cars on my dyno and have an old pump lying, but have no controller. I will setup a table on the standalone ecus to control flow.

Thanks