Fuel Gauge

[mqharko]

The sub tank fuel gauge on my 1999 toyota landcruiser ute hzj79r doesnt work at all. What can i do to fix this?

[pipebender]

if you short the sender wire does the guage work? it should slowly move to fuel if the wiring and guage are working correctly. ( Ignition on if it normally reads empty with ignition off). If the guage doesnt move most likely faulty sender.

[mqharko]

How do I short the sender wire? What do I do If it's a faulty sender?

[pipebender]

disconnect the wiring at the sender and earth out the wire or loop the terminals together at the connector just make a short jump wire, ( looping the wires may not give you a result if the earth wire is your problem best to short to earth ) you may have to wait 20- 30 secs for the guage to move. Good luck

[302 cruiser]

if you short the sender wire does the guage work? it should slowly move to fuel if the wiring and guage are working correctly. ( Ignition on if it normally reads empty with ignition off). If the guage doesnt move most likely faulty sender

what? dont you mean if the guage does move you have a faulty sender?

i would short between the 2 terminals of the wires going to the sender first then if the gauge dosent work then i would short to ground

[pipebender]

you are correct, my mistake, the guage or wiring would most likely be faulty if the needle didnt move. If it did the sender would be the issue. Cheers

[mqharko]

Thanks for the replys. Where would I find the sender?

[302 cruiser]

its the bit in the tank the wires for it go from the back chassis cross member forward to the tank

[mqharko]

No where under the bonnet do i find the sender so i can test whether or not its faulty.

[302 cruiser]

yea its in the tank

[mqharko]

thanks for that mate.

[mqharko]

i found that right before the rear sub tank, theres a connector join. The connector on the side running to the battery is a 3 way connector with 3 cables going into it. The connector running from the fuel tank is a 3 way connector with only 2 cables running out of it. Am i missing an earth from the fuel tank side?? I looked where the cables go into the tank and only 2 go in, so its not like theres a broken cable somewhere.

[302 cruiser]

no there is only 2 wires to the rear tank the 3rd one would be if it had a fuel light on the rear tank and they dont, did you bridge the wires and see if the gauge moved?