'93 w124 M104 Aux fan ground location.

[dirtyhands]

Hey fellas I am having issues on my aux fan on the wifes '93 300te m104. I have a bad ground (w9) on the system, since when I pull the a/c high presure switch get nothing and also pull the coolant high temp sensor, nothing as well. When I jump a ground to each side of the switches, I get both a high and low fan speed like I should. I looked at the wiring diagram, it says W9 is the ground location, and its behind the left headlamp, but there is no ground point there. Than I looked through the same manual and it says w9 is in the front lower left engine compartment behind the Receiver Drier. But per the wiring, w9 shares with the left headlamp, so while the headlamps where on, I disconnected w9, left headlamp stays on!

I'm just trying to find the ground, since I suspect it corroded, hopefully allowing me to run the air con! Thanks guys in advance!

-----dirtyhands!