Thread: I have a question for you electronic gurus'

Originally Posted by TUSHHOG

Sound's like your Nav. Lights are robbing the ground from your gauge. Try putting a temporary jumper from the gauge body mounting bracket to a good known ground.
Just my 2 cents, which don't mean much on here!!!!


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This could very well be the case. If you have a ground wire piggy backed from the Nav lite switch to the gauge, move it to another ground location. Just trace the black wire from the fuel gauge and let us know where it runs to.


BRM

the grounds come from to differnt wires, but on the gauge there is a blue wire that has a piggyback wire (blue) that is connected to "Lit" and then goes over to the tach, I follow the blue wire back and it is connected to the nav lights on/off switch

That blue wire is the wire that runs the light in the gauges. It turns the lights in the gauges on when you turn the Nav lites on.


BRM

well, I finally felt like getting out and fooling with the wiring again, after phone conversation with BRM this morning and re reading some post from like Tush, I decide to run a temporary ground from back of fuel gauge ground to the ground on my starter battery, well turn the key on and fuel gauge lights up (yee haw) flipped the navigation lights on and the fuel gauge is not effected (a big yee haw) so I am assuming that it was the ground all along the way whats yalls thoughts

I told ya.....Tush Hog is the man He works on these kinda problems everyday, has for years.