ESP.net

Hello, I had an issue upon initially starting the car up first time with the new motor. NA before everything worked fine. Gauges fuel sending unit etc. etc. My issue is my Blk/White wire going to the Fuel Sending Unit had melted and made a mess. It melted some of the connected 2 wires Yellow and Blue/White wire. It appears the culprit is the Black/White wire that goes to the Fuel Sending Unit. It fried all the way to the plug.

What could have caused this? I have checked fuse # 15 10 AMP in my 95 integra GSR and it is fine. I believe this is used for the Fuel Sending Unit.

What has changed since before... I added a 96 jdm spec ITR gauge cluster and believe I might of swapped the green film on back to GSR one 94-96. Either way should of worked fine with each film on back of cluster. I also added Aeromotive 340 stealth fuel pump and the relay necessary. It appears I have done the wiring all correctly. 2 wires from stock harness to trigger relay. Yellow/Green (positive) and Black/White (large) (ground). Inline kill switch to the positive wire Yellow/Green. I ran the positive 10 gauge wire from alternator directly with inline 30 amp breaker to the trigger of relay. Then 10 gauge relay to Fuel pump. Then I ran negative Fuel Pump all the way up to thermostat housing of engine to make a good ground.

Fuel Sending Unit wire that melted is a small Black/White wire... what caused... this to heat up and melt?

Please any help would be greatly appreciated.... Fuel Sending Unit has 3 wires.... Blk/White, Yellow/Silver Dots, and Blue/White wire... I believe Blk/White wire is ground... Yellow is power...? What caused the Blk/White wire to get heat and power to it???