10th March 2018, 12:24 PM
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Senior Member
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Join Date: Jan 2014
Location: Belgrave, Australia
Posts: 803
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Quote:
Originally Posted by MikkiJayne
The factory harness does indeed have a function for this. The 13-pin Euro socket has a switch in it which disables the car's own rear fog light (in favour of the one on the trailer) and turns off the PDC when a plug is inserted. Its a single wire in to the PDC module in the boot, I forget which pin. If you have a 7-pin socket I'm not sure how you would do it automatically.
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Well, as I have no intention of wiring an electronic trailer brake module into this car, I could potentially use the blue wire to ground through the trailer harness... Depends on whether the PDC needs a ground or live on whichever pin it is. Or I could just put a toggle switch near the plug. Or I could use the reverse wire (don't use that either)...
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Cheers
Marty
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Current:
2001 Audi S8 - Brilliant Black with Black interior, C5 RS6 rims (whenever I actually put them on...), Solar Sunroof, Tinted side and rear glass, RNS-D, Grom, Bose, clunky old phone in arm rest!
2002 Audi S8 - Project
Replacement head coming arrived  thanks to MJ
Silver with Black interior. All features as the '01, with the 'S' mode auto shifter. Dodgey rear tint (need to find a way to get rid of that).
Family:
2009 Volvo XC90 V8 R Design - has a louder more obnoxious exhaust than the S8, sounds great! Love this thing - Q7 was double the price, and certainly not double the car!
Sold:
1997 Audi A4 - Hamilton's Club Sport, Achat Grey (will miss the old girl)
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