W140 PSE Pump Connector Wiring Diagram
 

1997 S-500.
Can anyone send me a wiring diagram of the PSE Connector and which wire goes where (the plug has about 20 or so wires)? The behavior I am getting leads me to believe that there is a crossed wire in the connector somwehere. The pump is about a year old.

ALSO, if it is determined that a wire is astray - how do you go about putting it back together? How do you hold all those wires together in the right positions to get them back in the plug?

Thanks!

I'd expect a crossed vaccum line long before a crossed wire in the connector. It is quite difficult to get the connector apart and very easy to plug the line into the wrong port.:rolleyes:

The pump is working, but there are some strange things going on.
Example, the back seat headrests won't go down and I am getting a code that is about the PSE pump and the reverse antenna (my car doesn't have reverse antenna).
When I bought the car, the door locks weren't working - so I had them fix it (not a benz dealer). I suppose they could have put the wrong pump in car? BUT I don't think so.
Also, the connector is missing the locking collar - the wires are all together and in the plug, but the connector is not locked to the pump.....so want to verify wires are where they should be.

There IS an early and a late pump, I'd get the part # off of the pump you currently have and run it through the EPC to see if indeed they installed the wrong one, it kinda sounds like they did.

I will get the number, in the meantime does anyone have the diagram of the connector or know where i could get one?

This should contain most of the wires;
http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1997/S500/SYSTEM%20WIRING%20DIAGRAMS/6447.pdf

More here;
http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1997/S500/SYSTEM%20WIRING%20DIAGRAMS/

br,
syljua

This is perfect! Thank you.