Inertia switch no power

I have Seicento 1108 sporting T reg . car started then cut out thought i was out of petrol i was low so put £10 in and tried to start car but would not start up .

so checked to see if there was a feed to the carb nothing , then checked inertia switch and i have no live feed from it , the car was running yesterday checked all fuses that i could see , all ok . any ideas anyone

it doesnt have a live feed, it deals with the negative side of things.

when u turn the ignition on, do you hear the pump prime for 2 seconds or so?

No nothing

ok, check the 10A fuse near the ECU. If that is ok, then i would start fault finding on the fuel pump wiring.

bung a multimeter accross the fuel pump connections and get someone to turn the ignition on. the pump is under the rear seats. lift them, and there are 4 nuts holding a metal place in place - its under there. one set of wires is for the gauge, the other for the pump.

if power is getting to there, its safe to assume the pump is dead - but u may wanna try running a 12v feed to it just to make sure

checked 10 amp fuse ok

had the panel off at the rear seat/tank

put a test light in at the 4 wires at the fuel pump
one wire is live
another is live but dim
and the other 2 wres have nothing

anyone know the color for the pump feed

as checked the 2 wires at the inertia switch under the dash but nothing from these
as assuming there got to be fedd to control the pump

so still reckon no power so dont want to condemn thepump yet

got a power probe but need the correct wire at the pump to feed to see if the pump is working or not

fiats how true
Fix
It
Again
Tony
thanx

you want help or not

Of course this is the best forum there is ,

anyone know the color for the pump feed .

green and black should be live to the pump.
black and purple should be the return.

you wont get much on the green and black though, unless the engine is turning over or the ignition has just been switched on.

use a multimeter to check that there is a connection from black/purple to ground.

Cheers ARC will try that . let you know

hi ;
i think there is 2 big wires and 2 thin wires the 2 big are the feed of the pump and the 2 thin are the level of fuel , put the test lamp on the 2 big wires then turn the contact on the lamp must be light.

The pump wires go to the pump, the gauge and light wires go to the sender unit.

Cheers

D

car was running fine yesterday came out today tried to start and that is it .

fun and games

one wire is live....bright may be fuel sender
other is live but dim may be pump
other two nothing earths

had lines of at inlet (carb/singlepoint)
so when cranked over had no fuel coming out

still no feed at the inertia switch
so if this has no feed it will not feed the pump as inertia is master control for safety so reckon fault is feed to the Inertia switch

unless this only has power when vehicle is running dunno
so is this down to
ecu at fault
fuel pump relay at fault

Supply to pump, then to earth via crash switch.

Does your car have an immobiliser?

Cheers

D