EC260 Trim Gauge Checkout

knottybuoy260

Hi Everyone:
  Just checking if anyone has experience with the wiring diagrams and check out for a Rinker EC 260 trim gauge and sender. The gauge is a Faria, p/n GBC050A with 4 wires on the back. Looking at the back of the connector they are white,black,blue and purple in colour. 
 I would like to bench test the sender, which is new, and the old gauge but need to know the connections for power etc to the gauge. 

If if anyone has a web link or can respond to me with the required connections to attach a power supply to check the gauge I would be most thankful. 

Reagrds,
Robert

Cableguy Greg

Purple is power, Blue is the backlight, Black is ground and White with a purple tracer is from the trim sender. Here is the diagram off of the 280EC, which should be very close.