Gauge Wiring Help

[BigRAWesty]

I would think so mate.

Out of interest, what's the yellow wire for?

Well not 100% sure. In the box they have a display setup. And run 2 x 9v batteries.
Both red and yellow are twitched together to positive...
I might pull the fuse. See what doesn't work. ..

I currently have red fused to engine control using a piggy back, and yellow into accessories on the key barrel.. and black to earth..