Low fuel light not working

[O2 V11]

My low fuel light has never worked from day one. When using a multi meter what if any reading should I get at the two pin connector under the tank when disconnected? or must this connector be joined to the main wiring loom to get any reading? The wires leading into this connector are grey and black and they come from the low fuel level sensor, l/h side of the tank. At the moment I have done 160 miles on the tank so the fuel light would be glowing if it was operative. Failing this, any other pointers as to what I should check, other than the obvious. To take the instrument panel apart and check the bulb and connections?

Rob

[callison]

Well, since it's a bit of a nuisance to access the bulbs in the dash, let's start with the accessable first. The low fuel switch just acts like a short when the fuel level is low, so if you disconnect the fuel sensor connector under the tank and check the sensor leads (the tank end), they should read zero ohms if the tank is truly low. With 160 miles on it, it might be, but if all you've been doing is cruising down the road at a steady 70mph or so, it might still have a few gallons left in it. I've seen 215 miles on a tank in that mode although the light is definitely on when you have that many miles on the tank. But I digress. If the tank is really low, the sensor should read close to zero ohms, if there's fuel, it should read open.

 

Since you have the plug disconnected, you can check the low fuel light bulb out too. Turn the bike ignition on and take a jumper wire and hook one end to ground and probe the other end of the fuel sensor connector (the one from the harness) and when you hit the correct pin, the low fuel light should illuminate. One lead is ground and one lead has 12 volts on it coming from the light bulb. If you can't get the light to illuminate at all, then you can start pulling the dash apart. The bulb is in series with the connector, sticking a ground wire in there will not blow a fuse or anything.

[O2 V11]

Thanks for the reply Carl. There is something amiss with the sender. Since posting my enquiry I have fuelled up and been for an 80 mile ride. Having at least half a tank left the sender should show no resistance (open), but it reads zero ohms. When I put the tank back on the first time I tucked the connector from the harness out of harms way under the tank. I thought if it doesn't work why connect it back up! Next time I have the tank off I'll attempt to illuminate the bulb the way you suggested. Thanks for that.

Another query, when I went to your rehosted schematic page I couldn't see the link to the V11 wiring diagram, is it just a case of my not wearing my glasses again?

Rob

[callison]

Another query, when I went to your rehosted schematic page I couldn't see the link to the V11 wiring diagram, is it just a case of my not wearing my glasses again?

Rob

53466[/snapback]

 

I just tried the link and had no problems. Give it another shot or go to the original site - it hasn't gone away yet and won't for maybe 3 more weeks.