<VV> Courtesy light hook up

[NicolCS at aol.com]

<snip>I  could wire up a connector based system, but I would  really like to 
know: 
How is this conection supposed to be made?  <unsnip>
 
I haven't seen the answer to your question yet so..  The cars came  one way 
or the other, mostly and there were different sub-harnesses for each  type.
 
The sub-harness for the dome lamp style gets constant power  (orange) from 
the fuse box. Any door switch or the headlight switch  provides the ground, so 
both door switches and the headlight switch are  connected together and then go 
to the lamp (white wire). These switches ground  directly to the body, so 
there's only the one wire connected to them.  
 
The underdash style harness works exactly the same way except the wire  
lengths and routing are set for TWO lamps mounted under the dash. In that  case the 
right lamp (orange) goes to the left lamp, and then to the fuse box for  
constant power.  The right switch (white) goes to the right lamp then to  the left 
lamp, then to the left switch, then to the headlight  switch. Either door 
switch can provide a ground and turn on the  lights or the headlight switch can 
ground and turn on the  lights.

 
The exception to this is the EM accessory kit which can be added to a car  
with or without a dome light.  In the accessory kit, each door switch will  only 
turn-on the one, local, underdash lamp and does not turn on the dome  lamp. 
In these kits, the white wire does not cross over from side to side and  the 
orange wire that plugs into the fusebox has a pigtail that provides a place  to 
plug in the existing dome lamp feed, if needed.
Craig Nicol