DIY OBDII to ScanGaugeII cable
 

I was tired of switching my SGII cable between cars now and then, especially since it's routed behind the console in the Elantra. So, I had a male ODBII connector (J1962) lying around from a dead vag-com ebay cable (VW specific diagnostic tool) and decided to make a 2nd SGII cable for cheap.

Here's the mapping between a standard CAT5 network cable and the J1962 connector

Brown - Pin 16
White/brown - Pin 15
White/orange - Pin 14
White/blue - Pin 10
Orange - Pin 7
Green - Pin 6
White/green - Pin 4 and 5
Blue - Pin 2

Facing the connector with the wide side up, pin 1 is in the upper right corner.

You could even make a SGII cable for next to nothing. If you don't have the male connector at hand you could use a junkyard female connector, extend some flattened pins made out of solid conductor power wire and tape it with the other male connector in your car.

This is good info.

I'm fuzzy on your last suggestion about using the junkyard male connector. Could you elaborate?

I edited my post. I had the male/female part backwards. Here's a pic I snatched from a pdf of someone who made a female connector. The SGII compatible cable will need more pins though.

http://img380.imageshack.us/img380/7...nnectoryb7.jpg