Connecting the trailer control module
15. Plug the 12-pin plug and the 18-pin plug into the trailer control module.
16. Fasten the trailer control module to the left wheel housing (Fig. 1/5, Photo 2) using a piece of
Velcro tape.
Connecting the power supply
Power is picked up directly from the constant plus (+30) of the battery.
17. Lay the red cable on the left side along the vehicle's cable harness to the front into the engine
compartment. Lay the cable as shown in the vehicle drawing (Fig. 1 Photos 6, 7 and 8).
18. Push the cable through the cable leadthrough (small leadthrough) (Fig. 1/3), insert the cable
grommet. Make sure that the cable is securely fastened.
19. Let the quick-connect receptacle of the red/blue cable of the cable harness and the individual
red cable lock into place in the fuse holder (Fig. 1). Close the secondary latch.
20. Connect the eyelet of the individual cable to the M6 screw terminal of the battery plus
distributor (Fig. 8).
21. Fasten the fuse holder in a splash-proof manner (Photo 8).
22. Insert a 15A fuse.
Note: Ensure sufficient strain relief and correct installation of the fuse holder.
Special information concerning vehicles with parking distance control (PDC)
On vehicles with PDC it is possible to deactivate the PDC for trailer operation.
23. Lay the brown/white cable to the PDC control unit above the right tail light (Fig. 1/9).
24. Open the 16-pin plug and insert the contact of the brown/white cable into compartment 5.
25. Close the plug and plug it back into the PDC control unit.
Note: If the vehicle is not equipped with a PDC system, insulate the brown/white cable and
secure it properly.
Checking the correct operation
26. Reconnect the ground of the vehicle's battery.
27. Check the trailer function with the help of a suitable test instrument (with load resistors) or
with the help of a trailer.
28. Secure all cables using cable ties or adhesive tape.
29. Reattach any parts removed for installation.
WESTFALIA Automotive GmbH
16
306 560 391 101 - 002 - 39/07
Fiat 500