[RegaNewell]

I believe I made some good progress today.  The power wire for the low/high speed solenoid is an orange/black stripe wire.  It goes to the electrical panel inside the engine bay.  It was connected to a green/yellow stripe wire that I eventually traced to the front passenger electrical panel in front of the passenger seat.   It was connected to a black wire that went to that odd switch mounted in my dash. It was a basic on/off switch, the other wire was also a black wire that was connected to a baby blue #12awg wire.  I traced this wire all the way back to the same electrical panel in the engine compartment.  It was connected to a relay that was actually labeled Fan Control.  This is where I have to say how dumb I felt.  That saying that you can't see the forest through the trees is absolutely true. 

Quote: Urban Dictionary defines the expression to mean someone is so simple minded that they can't figure out the simplest problems.  Their minds are like great big empty voids of any kind of logical thought.  This is why even though they can see the trees their simple minds can't grasp that's the forest.

After spending 2 hours tracing this out (before I hooked up the tick tracer), I was determined that this green/yellow stripe wire had to go to the DDEC. I spent a lot of time cleaning all the black oily gunk, lots of tie wraps, and removing a lot of black tape from the wires going to this unit, no green/yellow wire.  This is when my brain kicked in an hooked up the tick tracer.  What's really bad is after using the tick tracer and tracing the wires all the way to the front and all the way to the back, is when I opened my eyes and actually saw that the orange/ black wire was 2 inches away from a relay that was actually labeled Fan Control.   It looks like the green/yellow stripe and baby blue wires were just spares that ran to the front electrical panel.  Someone removed the orange/ black stripe wire from the relay and connected it to the green/yellow stripe spare.Then the baby blue wire was hooked to the fan control relay.  The switch on the dash was connected to the baby blue and green/yellow stripe wires. I am going to remove the switch, unhook the spares and connect the orange/black stripe wire back to the relay.  I will then check the relay and actually make sure it functions correctly.