(FIXED) BJ75 Troopy, swapped transmissions, now fuel gauge dead (1 Viewer)

[nuclearbeef]

1985 BJ75 Troopy with H55 and vacuum split case.
Removed H55 and case and replaced with 1987 H55 and manual split case from a BJ75 Troopy.

I failed to pay any attention to the plugs when I removed the trans. I figured it would be impossible to get them wrong.
Nope. Fuel gauge not working now.

I originally plugged the black, 2 pronged plug coming from the fuel tank into a white connector on the transmission wiring harness because it fit.
After seeing the dead fuel gauge, I found a black connector on the harness that also fit and swapped the tank plug over to it.
Still dead.

Did I kill my gauge, or is there something else amiss?

 

[nuclearbeef]

Update...

After chasing down some blind alleys (including swapping the transmission wiring harness), I believe I have isolated the issue.

Fuel gauge never moves off the empty pin.
Disconnected the cannon plug between the back of the transmission wiring harness and the fuel tank.
Ohmed the 2 pins to the tank. Open. No continuance.
Placed jumper wire between 2 pins on plug on the transmission side... Fuel gauge went to full.

Sending unit on order from Partsouq.
I guess it was just coincidence the sending unit went bad at the same time I swapped transmissions.

 

[nuclearbeef]

FIXED!

New sending unit did the trick.