Plug connection and relays

The plug connections X1/3, X1/4 and the solenoid valve and return pump relays are located in the passenger compartment wiring harness on the left at the front behind the PSM control module.

Fig 1: Identifying Plug Connection And Relays

Courtesy of PORSCHE OF NORTH AMERICA, INC.

1. Relay for solenoid valve
2. Relay for return pump
3. Plug connection X1/4 (21-pole, white)
4. Plug connection X1/3 (21-pin black)