At 11:59 AM 9/10/2009, Jeff Lincoln wrote:
>Greg - Yes knowing which wire is which would be a big help as well. The
>independent ground is a good idea.

Well, the actual sensor lead is obvious.  For the heater wires,
Bentley says for example white and brown for '87, red/yellow and
brown for '90 -- obviously the brown is ground in each case.  But how
they're connected to the sensor leads makes no difference -- the
heater isn't grounded to the sensor internally exactly in order to
keep the ground paths separate.

Am I misunderstanding what you need?

Yours,
David