2002 Chevy Express 3500 Van

the test wire are between the ORANGE / black and yellow.

as stated before cut the yellow and test between yellow keyside and ORANGE / black. a good way to do without fluctiation is to put the brake on put the van in reverse and hit the key to start the starter wont crank but you will be able to leave it there long enough to get a reading.also make sure you get a 1% tolerance resistor to match the value.

Yep, its the ORANGE / Black and Yellow wire. I got the exact tolerance by using 2 resistors in series. Came to exactly 3.309 kohm, which is exactly what was showing on the meter. Now I can sleep in a little longer, knowing my van will be nice and warm, no ice on the windows when I get in it. Ofcourse now my wife wants one on her car! . ............errrr

.......cough........ Also found why my running lights were not working.........cough.....seems that they turn off when you have the Ebrake on..........cough........ *feeling stupid*.........

Thanks for all your help guys!