In fact all connections...
Look at the solid red and solid white wires going into the back of the dash, these are power and signal wires.
Does anything else act funny? If so its most probably an earth, would be my guess also.
Proud TQE Operator and President of SEFAG - the Society for the Elimination of Ford Automatic Gearboxes
Pacemaker headers + 2.5" exhaust
EF Fairmont interior
Lowered King springs
5 speed manual
Newest mod: EF Ghia wiring loom and dash