First lets verify which fuse is blowing. I suspect it's fuse # 37 since that is just for the heater system. Fuse # 14 is also a ten-amp fuse, but there's a lot of other stuff on that circuit.
For these first three diagrams, I have the first two turned around. The second one is the first diagram for this system. The last two diagrams are just the first two with red lines added to show fuse # 37, (red arrows), feeds five circuits. The first circuit is the coil for the heater fan relay. That coil is not likely to be shorted. Same with the coil for the compressor clutch relay. You had the compressor clutch relay unplugged already, so we can ignore that circuit for now. That was the third circuit.
The last two places are fed through the joint connector. At first it looks like two different fuses are feeding that circuit, but if you look closer, you'll see there's actually two different circuits there. My green arrow is pointing to the very hard-to-see dot that signifies that is a connection. From there, current goes to the controller, then, on the last diagram, it feeds the air inlet control servo motor. From there I can't tell what takes place, but it suggests there's electronics in that assembly, so that is a good suspect.
I'd start by unplugging that motor. If that doesn't stop the fuse from blowing, you're better off using my trick to avoid having to buy a lot of fuses. In place of the blowing fuse, plug in a pair of generic spade terminals, then use a pair of clip leads to connect them to a 12-volt light bulb. For this type of circuit, a 3057 brake light bulb will work well, and it has a base that makes it easy to connect the clip leads.
Now, when you power up the circuit and the short is present, the bulb will be full brightness and will get hot, so be careful where you lay it. It will limit current flow to a safe one-amp. When you unplug something, move a wiring harness around, or do anything that makes the short go away, the bulb will get dim or go out.
If you unplug the controller, and that makes the light get dim, there is something on the other side, (the output side), that is shorted, but at least this will narrow it down for now.
Images (Click to enlarge)
Wednesday, November 27th, 2019 AT 5:59 PM