Ok I figured out the problem and it wasn't easily seen. I pulled the fuse block out and saw someone bodged in inline fuse. Red wire 1140 was getting 12 volts from this fuse but I wasn't getting power at the relay under the cab. Wierdly enough I was getting continuity which made no sense at...
I have a 2008 S250 I've had for a few years. The fan switch never worked but recently decided to try and diagnose the issue. The switch itself doesn't get power. The fuse is good. I found a relay under the cab that looks like it runs up to the blower. It has 1 red wire 1 black wire and 2 orange...