Fuel Pump Re-wired With Larger Guage Wire?

[neergnevets]

My new car has two fatter guage yellow wires running to the fuel pump in addition to the standard wiring it appears.

Somewhere between the pump and under the dash the yellow wire becomes one (assume there is a box or something behind rear seat), with a fuse attached before it reconnects with the factory wiring under the dash.

Car was running fine, though all of a sudden I can't hear the pump prime at startup, and needless to say, car doesn't start. Thought yellow wiring may be a home made kill switch, though can't seem to find any switches along the yellow wire.

Car is stock so can't understand wire a big enough fuel pump that warrants bigger guage wire would be installed? Anyone seen this before?

Any ideas on where I should be looking for the problelm?

[tacker]

pics please

[WazR32GTSt]

there's a fuel pump fuse under the dash, RHS.. check it

and if there's a fuse somewhere along this aftermarker wire... check it

if its all fine, i would hit your local autoelectrician for advice

[Guilt-Toy]

go the rear of the car and double check that the pump is actually getting power. you need a multi meter and someone at the boot to check the wires.

if your pump still uses the stock setup ---

I installed a relay to my fuel pump on the weekend so i can tell you which wire it is you need to check - there are 2 plugs that go onto the top of the round cap for the pump thats in the tank - the plug with 3 wires is the fuel gauge sender unit and the plug with 2 wires is the positive and negative for the fuel pump. the power wire is the BLUE wire. Took me ages to work it out i needed to get a mate to help because when you turn the ignition on it only turns on for 1 second so as i was runnin back to the boot it was switching off.

if your not getting any power then it would be something to do with the wires