Westfalia 321 505 300 107 Installation Instructions Manual page 21

Electrical system for towing hitch for vw passat
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1. Separating the earth wire from the battery
The earth wire must be separated from the battery before the work begins to prevent short circuits
during assembly and for safety reasons (fire risk)!!!
2. Assembling the line set and the power outlet socket
Remove the luggage compartment floor cover. Disassemble the tail plate covering, also those of
the right and left tail light. Remove the cover from the vehicle's individual leadthrough underneath
the left tail light.
Move the cable ends from the boot to the outside through the vehicle's leadthrough and then further
towards the power socket retaining plate, adjust the cable length to the socket.
Line set and ready-made socket:
Seal the vehicle leadthrough with the leadthrough bushing pulled over it.
The power socket holder is ready-made. Press the contact holder into the socket housing and slide
the rubber sealing onto the socket.
Affix the socket on the retaining plate with the screws and nuts provided.
Line set with screwed socket:
Pull leadthrough bushing and socket sealing onto the wire lane.
Seal the vehicle leadthrough with the leadthrough bushing pulled over it.
Connect socket according to wiring plan, slide rubber sealing onto the socket.
Affix the socket on the retaining plate with the provided screws and nuts.
Caution!!
The following points are especially to be noted when assembling the socket:
- The leads may not become caught, squeezed or damaged!
- The seals must be fitted properly! Socket sealing should be on the insulating hose, and not on the
individual leads!
- Lay the line set so there is no risk of abrasion or wear!
- Do not lay close to the exhaust system!
Lay the line set end with the white 12-pin plug, earth wires, ...onto the left tail light. Pull out the plug
from the tail light and connect up with that of the line set and secure. Plug counterpart back into the
tail light and secure. Lay the wire lane with only 2 x 6-pin housings along the tail plate to the right tail
light. Pull out the plug from the tail light and connect up with that of the line set and secure. Plug
counterpart back into the tail light and secure.
Attach the cable socket of the earth wires, brown to a suitable vehicle earthing position at the rear
area.
Assembly / Continuous power supply of the control unit :
Affix the control unit to the left side wall with Velcro tape.
Plug the 12-pin line set plug onto the control unit.
Lay the long red single cable along the left side of the vehicle to the front. If there is a suitable
continuous positive in the luggage compartment (e.g. +12V socket), this can be used.
Secure the flat pug receptacle of this and the accompanying red single cable into the fuse holder
and install yellow clip, insert fuse and put cover on. Connect the wire to a suitable +12V supply
cable or screw directly onto battery-plus.
Take care to maintain adequate pull relief and check for impeccable securing of the fuse holder.
21

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