After much work, I'm still stuck in getting my radiator fan to work when the
temperature rises.

I've replaced the following:

1) Temp sensor/fan switch in radiator
2) Ballast resistor behind front driver headlight
3) Relay in fuse area

I've also tried the "Ken" trick of jumpering the wires. I may be completely
stupid here, but what I did was jumper two contacts in the female plug, then
ran a wire from the jumpered connection and a wire from the remaining female
contact to the male plug. Based on what I understand, the fan should come on
with this jumpered arrangement. I tried every combination on the male plug,
and the fan never came on.

Am I doing this right? Is this how others have tested their radiator fan
switch? Sorry for being dense, but I'm guessing I may not be jumpering
correctly.

Also, shouldn't the radiator fan come on when you switch the AC on
regardless of temperature?

Last question.. if my radiator has a ground problem, wouldn't that cause a
complete inability for the fan to come on? If I look underneath the van in
the spare area, I see two sets of red wires going to two different posts on
the fan. Coming out of the wiring harness, I see a black wire (assume its a
ground) going up and what appears to be UNDER the floorboards.

If this is the ground wire, where does it end? If I cut it and reground it
to another connection, will I screw anything up? I only ask this because I
can't see where this wire terminates, and if all I have to do is ground it
elsewhere on the frame, the cutting and relocation of the ground seems like
a solution.

Sorry for the long message and possibly elementary questions. I'm running
out of solutions.

Bill