Jim, that was world class trouble shooting! 45 min. and I was so happy. ETS and ABS lights out at start up, no steering limit reset. I pulled the relay, did a jumper from the two large lugs, no key on, no pump run, but I had 12 volts connected. I pulled the drivers headlamp, removing the lower trim for the 2 X screws, jumped the motor at the 2 pin, my hot was a red wire, pump runs, circuit pulled, solderd, mine was end pins 8 and 15. Really cool. Note, on another matter, the heat is on all the time on my ML 320. I have verified the A/C control module, located behind the center dash, is maintaining 12 V to the "Hot" motor direction all of the time. The temp set dial (not climate control, or set by degrees, manual type) is inputing a change in resistance, but referencing + or -. Interior temp sensor is at 4,500 ohms. Dealer wants 275 US. I will try frys for replacement component, when I figure it out. Keep it posted as I find out. Again, a most excellant, and satisfying solution you have, Thanks again, mark