Quote:
Originally Posted by upnorth
I found out this past weekend (fortnuately not the hard way) that my gas gage isn't working. I checked for a blown fuse and all seems fine. Other gages are working fine.
Any suggestions??
I even tried a few good whacks with my hand...
|
Hello Upnorth,
You didn't give the year and make of your boat. If you have a three wire tank sending unit, signal return, ground, and tank ground, remove the positive (signal return) feed wire and turn the ignition key to ON and note where the needle is. It should be pegged past empty or past full.
With the ignition key still ON, ground the signal return wire and look at the gauge. The needle should be pointing opposite of where it was when you had the wire simply removed but NOT grounded. If the gauge works like what's described in the test, that usually indicates that the wiring from the fuel tank sending unit up to the gauge and the gauge itself is okay. You then will be dealing with a faulty fuel tank sending unit.
If the boat is fuel injected and / or you see more than three wires on the fuel tank sending unit, consult a wiring diagram for your application BEFORE removing or grounding any wires. Essentially, you want to remove and then ground ONLY the wire that provides signal return to the gauge.