Trailer wiring converter - 5KQT.

["Swann, Benjamin R. (BSWANN)" <BSWANN@arinc.com>]

Thought I'd contribute a tidbit since I just finished wiring the wagon for a
trailier.

Brought a Five to Four wire converter to hookup the trailier.  

Won't get into any soldering debates here, but I dont particularly like
those little crimp things they supply.

Anyway, all the wires were 1 mil, except for the tail lights which had
several .5 mil coming out of the light control unit.  I Guess AUDI splits
the load up by supplying the driving lights individually.

I know from prevous experience wiring trailers and cars that this small
gauge wire will not supply enough current to the trailer to run continuous
driving lights.  I suspect there may be burned harnesses from trying to do
this in others if they did, or blown fuses if lucky.

Anyway, I ran a 12 guage multi strand wire($.09/ft at Home Depot) from the
Battery + from under the seat to the left rear where I'm tapping into the
wires in left taillight harness.  Ran this inside of a plastic wire
protection sleeve as an added measure so it won't chafe and short.

Relayed the 12 Guage positive to terminal 30 on Bosch light relay through to
the tailight converter wire for the running tail lights. 

I used one of the .5 mil wire as the relay control (relay terminal 85),
other side (86)to ground.

This worked great, nice bright light to the trailer lights, no risk of
burning out car wiring.

I'm tempted to relay the turn signal and stop lights as well for nice bright
lights overall to the trailer.

Ben Swann

'85 4KSQ
'86 5KCSQT
'87 5KCSQT Wagon