Here is the pin-out.
Hi Rockthemullet
Thanks for the offer - can you tell us what is the pin-out on the CWA-100 / MB 0005000486?
Should be
1. Chassis ground
2. Control return
3. Control
4. 12V
http://mbworld.org/forums/w211-amg/4...w-about-5.html
To let it run at 100%, just connect 12V also to the control pin. To confirm, measure if pin 1 is connected to the pump housing ground.
See:
http://webpages.charter.net/n8nxf/EV...ant%20Pump.pdf