Wired up fuel pressure gauge, light not illuminating

[JDUB348]

Ok so this last weekend i wired up my autometer lunar fuel pressure gauge. As of right now i don't have the sending unit hooked up (waiting on fittings in mail). Could that right off the bat be why its not illuminating?

I have the white wire off the back of the gauge spliced into the red wire which goes into a add a fuse. Also have the black ground wire off the back of the gauge spliced into the long black wire and grounded out on the bolt above the fuse panel below the steering wheel.

I notice when i hook the gauge up to power the needle will jump to the maximum reading and stop there.

So any one have an idea if its just because i don't have the sending unit hooked up?

 

[Anabolic]

is there an external bulb line on the ultralites? if so the bulb should be wired to dash illumi lights with dimmer, ect.. not a power

tell us the wiring schematic/colors


and no, sending unit is for gauge light should be external or on when you tel it to go on via switch