Yamaha LCD Speedo/Fuel Gauge Testing?

DukesFin

Chief Petty Officer
Joined
Oct 12, 2005
Messages
500
Part #: 6Y5-83500-A0-00

It's with a 1990 Yamaha 150...

When I turn the key on, the upper LCD mulit-function (tach/trim, etc) works fine. The speedo/gas gauge only "lights up". Nothing else. I've tried straight wiring the fuel sending unit (directly grounded tank to battery and ran wire above deck from sending unit to both the white wire with blue stripe and the plain white wire... NOTHING.

I can press the two buttons on the gauge and still nothing. It only lights up (nav lights).

Any ideas on what's going on with it? Blue wires are hooked up, yellow, etc... All wiring seems to be hooked up the way they are supposed to be...

I'm really not wanting to dump over $300 into a gauge that I really only use for the fuel meter!!!

Thanks!
 
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