Wiring Harnes Firewall
6.1 Turn signals
6.2 Relay block
6.3 Terminal Block
6.4 Fuse Block
6.5 Starter lock out
6.6 Glow plugs
6.0 Wiring Harness & Firewall (added 2019) more to follow as time permits
During the 4X4 wiring rebuild I decided to document as much of the original as I could as I may need it later on one of the other Vans.
|It's nopt perfect but will hopefuly help you along, I was surprised to find for the most part the wiring colour codes in the Bentley Manual is very accurate. Pages 156 to 164. If you do not own a copy of this, you had better rush out and buy one it will be the best $50 bucks your ever spent. While you are at it pick up one with the turbo diesel or TDI of your choice, eventually you will want to upgrade and that manual will be helpful too.|
Click most pictures for bigger format
Click for PDF
Firewall main waring harnes to Engine Bay
Same as left but inside cab
Relays, fuses and terminal block on top left for external lights and more.
6.1 Turn signal
This switch has 4 pins, which provide for left turn, right turn, common, and horn. All in one piece
|Wiring for this circuit is tricky, Power comes from the fuse block
(brown wire) to the hazard switch. A blue wire runs from the hazard
switch to the flasher relay. An orange wire runs back to the hazard
switch and to the center pin (49a) of the turn signal switch the yellow and
greens run to the turn signal lamps. The adjacent schematic from the
Bentley Rabbit manual is the most useful piece of information you will
find. Click on it for enlargement.
More detail on this subject later.
NC Orange Yellow
NC Orange Green
|Photo and pin out are not the best but following the text above right the brown comes from the fuse block, the blue goes to the hazard relay the orange comes from the hazard relay and turn signal switch on the steering column, with the yellow and green going to the turn signal lights in parallel with the yellow and green from the steering column switch.|
6.2 Relay Block configuration
Relays from the left
Thinking about modifying relays by adding an LED on the top so you can see which ones are on.
6.3 Terminal block
6.4 Fuse blockFUSE LAYOUT - TOP TO BOTTOM LEFT TO RIGHT
6.5 starter lock out (Automatic park interlock bypass)
After you have modified your vehicle to a manual transmission, you will need to bypass the automatic transmission starter lock out. IE the don't start while in gear dummy lockout.
6.6 GLOW PLUGS
Glow plug relay pin out
30 - + 12 volts from Battery
50 - engergize
85 - ground
86 - Pre glow
87 - Output to GLow plugs
L - Glow light on dash
T - Temperature sensor on engine