help finding schematic cabin wiring harness from fuse block 1990 to 1994

[river basn elec]

I stripped out a switch and wiring loom yesterday. Working on a rear defrost circuit. That era has a big switch supposedly with a built in timer. There is also a temp sensor that routes to the other side of dash, to under the evaporator, mounted on bottom of dash. Looks like a thermistor.

I prefer to know how they designed this circuit, so tracking out what went to relay, or GEM or any related compoents such as the rear wiper also sharing some wiring on the harness.

Ford resource you can guide me to? I studied every last forum document and nothing very useable for cabin that shows a actual schematic with pins in junctions, and wire color codes.

I am used to studying factory resources and they are much deeper in detail that docs I have seen posted on here.

 

[BKennedy]

I suggest you get yourself a Ford electrical and vacuum troubleshooting manual for your specific year. They are available on line. I got mine off eBay.