Hey firefighter7128, One other circuit upgrade that I added to Miss Purdy (84 - 928) was to wire in a toggle switch as a 3rd control option to turn on the auxiliary electric radiator fan. Normally the electrical aux fan relay (XVIII) receives a ground from either the large radiator temp sense switch (bottom front of radiator) or the smaller A/C refrigerant temp switch (front of condenser – screwed into a heat sink on the top side of the freon drier – the switch on the front of the drier is only for low freon pressure sense)
By soldering in a toggle switch in parallel with these two temp sensing switches you can manually select the electric fan to come on early if stuck in traffic and you begin to see your engine temp gauge creeping upward. I ran a couple of wires from the back side of the relay XVIII socket to the rear hatch release panel on the left side of the driver’s seat to mount the switch. The toggle switch has one wire connected to pin 85 of the relay plug-in socket and the other wire goes to one of the primary ground points above the fuse panel.
Good Luck, Michael
