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Discussion Starter · #1 ·
I've just had a brake controller fitted to my 2006 Treg R5. Everything is working fine HOWEVER when braking both of the caravan indicator lights ALSO come on too
: (but not on my treg)

The tow bar was fitted by the VW dealer and the brake controller was fitted by my local tow bar specialist. After spending two and a half hours checking wiring etc yesterday, we're no closer to a fix :!:

If anyone has any suggestions
(or fixes) on this problem it would really be appreciated

Cheers

Roger B
 

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Roger

Most of my problems concerning trailer lights have been related to poor earths. In my experience trailers have a point where the wiring is connected to the trailer and this wire goes back through the loom to vehicle's ground. In the past it's just been a matter of cleaning up the connection point.

I have a Tekonsha Voyager in my R5, wired through the factory fitted connection, and have had no problems other than the occasional trailer lights warning on the dash. I generally ignore the warning because experience has shown the lights to be working.

Anyway to assist in fault-finding, do the logical thing, divide the circuit in half, meaning disconnect the trailer plug and connect a test plug or use a Voltmeter to check that the appropriate signals (no pun intended) are coming through at the Treg. You can use a LED checker as the Touareg's system gets confused. Next try your trailer on a another vehicle. It doesn't have to have a brake controller, you're only interested in whether the lights work correctly. If all else fails goes back to the last known good condition ie disconnect stuff one at a time until you get a good result.

Cheers

Bob Z
 

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Discussion Starter · #3 ·
: After a third (yes 3rd) visit back to my tow bar specialist, I still have the problem of my caravan indicators illuminating when the foot brake is being used.

The caravan brake controller was the main suspect, but my VW dealer nows says it's a fault with all MY07 Tregs and can't be fixed:?:

Sounds like a load of bull to me, but perhaps someone has come across tha same problem (surely I'm not the only person on the planet using electric brakes :!: )
 

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Discussion Starter · #4 ·
My nephew works at the VW dealership and he rang me today to confirm this has been a problem (with Touregs) for at least 2-3 years :!:

Apparently their own mechanic had a similar problem about three years ago and ended up ringing VW in Germany who confirmed their wasn't a fix to the problem.

You would think that by now someone could have worked out a remedy

I'm going to follow it up with VW Australia and hope to hell I don't get booked in the meantime
 
G

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never had this problem when i fitted them used smart relays from towsure or the vw kit ,they have always worked ok, also there are no vw technical files for this i can see sorry cannot help any further ask vw dealer to send in a DISS report to tech dept
 

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Discussion Starter · #6 ·
touareg techy said:
never had this problem when i fitted them used smart relays from towsure or the vw kit ,they have always worked ok, also there are no vw technical files for this i can see sorry cannot help any further ask vw dealer to send in a DISS report to tech dept
Thx Techy, I'll persue this through VW (there must be a fix for it)

Cheers

Roger B
 

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Discussion Starter · #7 ·
After two weeks of touring with this problem I had my wiring checked out by another person. They confirmed it wasn't the brake controller at all but my treg wiring. After more complaints to my local veedub dealer they fmially confirmed that my treg had a USA, Slovakian (or Mars) wiring coding
All working OK now
:mrgreen:
 
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