I really don't know what to say guys, I'm still having problems with this and Dan's FD harness hookup instructions.
"Water Temperature Gauge: Connect one yellow/black harness wire to the
temperature sender & the other yellow/black wire to the yellow/white."
I left the jumper harness plugged into the dash harness and cut the rest off as the instructions say - But I only have one black/yellow wire.
I have all the lamps across the bottom of the cluster. My fuel level gauge is also working. My odometer is also showing mileage. I'm running into not having any illumination in park/headlights. I also show no RPM while cranking.
Here is a picture of what I have right now:

The white wire that is spliced into the yellow/white wire is the coolant temperature from the sensor. I figured I had a missing ground.
I did some research and pulled this up from another thread:
Looks like I have a black/yellow wire and a black with silver dots grounded on mine.
black/yellow is 3rd from top left and black/silver is top right.
[attachimg=1]
I ran a jumper wire straight to battery (-) from both these and neither or both seem to illuminate the backlight.