4kq rear defroster problem

[Ti Kan]

Tony Lum writes:
> The rear defroster's not getting any voltage out of the left rear
> wire.  Found a connector with a heavy white wire in the trunk left side
> harness but I'm not getting any voltage out of it either, or continuity
> from the inside wire.  Can anybody confirm that this is the defroster power
> lead?

Yes, the white wire is the +12V for the rear window defroster.  When you
turn on the rear defrost switch, does the instrument cluster defrost indicator
light up?  (You need the ignition to be on for this)  If so then your switch
is getting power and making good contact.  The fault would be a break in that
white wire somewhere.

If the defrost indicator light does not light up, then check fuse S15,
and the white/yellow wire that goes from that fuse location to the
defrost switch, as well as the switch itself.

The defrost heating element is grounded on the other end via a black wire to
the rear shelf.

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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