pierre Posted November 10, 2011 Report Posted November 10, 2011 can anyone tell me when i have fitted my new towbar to my mk2 galaxy is the wiring just straight forward or do i need to buy anything extra like a multiplex bypass relay?the towbar came with electrics but i have seen some very expensive multiplex bypass relays for sale Quote
Willie Krashitt Posted November 11, 2011 Report Posted November 11, 2011 No, you don't need anything special, just VAG-CoM to enable the dashboard repeater light. If you are tugging a caravan, then you will need a smart charge relay and wiring between car battery and towing socket for the fridge which is usually separate from most trailer wiring kits.George. Quote
chrispb123456 Posted November 11, 2011 Report Posted November 11, 2011 Usually vehicles with bulb failure circuit will suffer damage if no relay is used, having said that there has been members that have just scotch locked onto the rearlights of the car and had no problems. Quote
MadBaz Posted November 12, 2011 Report Posted November 12, 2011 Don't forget to use the foglight 'bypass' if you've got WORKING parking sensors. Quote
RADIOTWO Posted November 12, 2011 Report Posted November 12, 2011 Don't forget to use the foglight 'bypass' if you've got WORKING parking sensors. HI You may have answered a problem on another forum ! But why would you need a fog light bypass with parking sensors ? CAn you please explain, and I might gbe able to help someone with problems on another group Radiotwo Quote
MadBaz Posted November 14, 2011 Report Posted November 14, 2011 (edited) Thge foglight bypass/cut off is to stop reflective glare from the cars fogs when a trailer is attached and illuminates the trailer fogs instead.There should be a microswitch on the 12n socket.The parking sensors use this bypass to disable the rear sensors when the trailer is plugged in, stops false alarms, fault codes etc.I haven't looked at the wiring diagrams, but I do remember seeing something on TIS when I was testing my faulty rear sensors. EDIT: I may be barking up the wrong tree, a standard 12n fog cut off works on a simple nc com no circuit, where com is the fog feed, nc is to the car fogs and no is to the trailer fogs. The fog cut-off which deactivates the rear sensors maybe only on the dedicated Galaxy/Sharan trailer wiring kit. Edited November 14, 2011 by MadBaz Quote
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