115ETLF Fuel Gauge Display/Wiring

[Popster]

I'm trying to hook up a new gas tank to my fuel gauge. I have found the white and blue/white wires. At this time, the old tank was wired into the white wire. It just reads about 1/3 tank at all times by a hash mark along the right side of the gauge.

I'm installing a Moeller tank- it comes with fuel sending unit.

When I disconnected the wire nothing happened. I tried applying 12 volts to the wire to see what the gauge would do. I got a numerical readout on the display with varying reading on the hash mark. Same thing with the blue/white wire.

What SHOULD the display look like when a functional tank/sending unit is properly hooked up to the gauge?

thanks for any help.

 

[rodbolt]

Re: 115ETLF Fuel Gauge Display/Wiring

by applying 12V on the white wire its posible you fried it.
however lets assume you did not.
the system operating current path is from the guage, via the white wire, or white blue if using the yamaha sender.
Moeller should have the 33-240 ohm sender which uses the white wire.
so from the white wire to the sender,through the sender rheostat to ground.
however when testing it may take a monent,sometimes minutes, for each bar to change.
its a built in delay to prevent scaling of the bars when the liquid in the tank is sloshing.

 

[Popster]

Re: 115ETLF Fuel Gauge Display/Wiring

Rodbolt,

Thanks for the reply. I kinda figured it out last night- after I mucked with it without thinking it through.

When this rain and 20kts east wind leave, I'll give it a look.

Again, thanks!

 

[Popster]

Re: 115ETLF Fuel Gauge Display/Wiring

Rodbolt,

Thanks again for the help. Have the lights and gas gauge working. Turned out that the white/blue was the right wire for full gauge deflection.

To the left of to bars that indicate the gas level there is a small line that looks like a dash. Any idea what it is?

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My wife put the owners manual in a safe place. Whenever we do that we may as well just throw the item in the trash then and there because we never find something stored in a safe place while we still own it.

I have to rewire the whole boat. It's a wonder the thing didn't burn up a long while ago. I'll say one thing, whoever did it didn't have to worry about spend too much money on 16 gauge wire or on long lengths of wire. Some items were switched via positive, and some negative; just depended on which would use less wire I guess.

Again, thanks!

 

[rodbolt]

Re: 115ETLF Fuel Gauge Display/Wiring

hahahahah I know the safe place thing. its terrible when all I can remember is I placed the item in a safe place.
may take years to turn back up.
and I know the thing about 4 miles of wires in a 16ft boat all either red or black and some change colors halfway down the hull.
see it all the time.
sometime ago a customer had a local"electrician" rewire his 28" parker,
when it came back all the wireing was either red or black with nothing labeled and looked like a plate of spaghetti behind the console.

 

[Ray Neudecker]

Re: 115ETLF Fuel Gauge Display/Wiring

I too have used the safe place option. I have also gone through the whole place looking for something only to have it show up much later when looking for something else in its safe place.

 

[Popster]

Re: 115ETLF Fuel Gauge Display/Wiring

Rodbolt and Ray,

I think the same gremlin who turns the light on in the ice box when you open the door switches stuff from safe place to safe place just before you look for it.