Fuel gauge wiring diagram request

[scott.howard]

I have a teleflex fuel gauge. #859692-3. It is pretty standard. The back has 3 connections around the edge and one in the middle. There looks to be an access plug also on the back of the gauge. The guage does not work. I just had service on the fuel gauge as well. After checking all the connections they look good. When I turn the key on halfway, getting the alarm indicator beep, the fuel gauge needle moves to the left and below the empty mark. Could it be backwards.

When the dealer added an nonresettable hourmeter he chose to connect it through the fuel gauge. Will this have any effect on the fuel gauge performance?

Thanks,

Scott

 

[Silvertip]

Re: Fuel gauge wiring diagram request

Did the fuel gauge work before the hour meter was installed? If so, the dealer apparently screwed up the wiring. The hour meter requires only +12volts when the key is on and ground connections. Properly done, it will have no effect on the function of the fuel gauge. I assume the hour meter does actually work??

 

[scott.howard]

Re: Fuel gauge wiring diagram request

The hourmeter does work. The fuel gauge wiring probably got messed up. If I could get an explanation to what the 4 connections are on the back I could do it myself. Any ideas where to look for a diagram or is it pretty straightforward?

Thanks,

 

[Silvertip]

Re: Fuel gauge wiring diagram request

There are four connections on the gauge itself. 1) +12V when the key is on. That connection can come from the +12V connection on any other gauge as they are simply daisy chained from one to the next. 2) Ground. Same thing -- gauges are grounded by daisy chaining them together. 3) Light -- same thing. The light terminals of each gauge are daisy chained. 4) Send -- this is a wire that runs back to the sender in the fuel tank. The sender is nothing more than a 33 - 240 ohm variable resistor. There are two connections on it. The send line going to the gauge, and ground. Here is a generic wiring diagram -- ignore wire colors as they likely will not match what yours are.

 

[scott.howard]

Re: Fuel gauge wiring diagram request

Absolutely perfect. Thank you very much for this diagram.

Scott

 

[barraflyfisherman]

Re: Fuel gauge wiring diagram request

Hi Silvertip,

What is Nav/Anchor switch powersource displayed on the map. Is this a secondary 12 volt power supply obtained from the Navman/Gps or Outboard?

Also I only have one terminal to connect to on the fuel tank I am assuming that this then would be positive and that I then run my earth to one of the screw/bolt holes securing the sender unit to the tank itself, would this be right?

Thanks in Advance for your help.

Barra Fly Fisherman.

 

[Silvertip]

Re: Fuel gauge wiring diagram request

GPS has absolutely nothing to do with this diagram. The wire you reference is the internal light for each gauge. When the NAV lights are on, this wire from the NAV switch turns on the instrument lights. It DOES NOT come from the ANCHOR terminal on the switch because you don't need the instrument lights on when you are anchored.