had a problem with my aftermarket central locking, traced it down to the power supply ( its not getting any ) strange thing is it has a supply from what is the fuel pump relay supply(large orange wire in the relay plug), this worried me cause i thought the car wouldnt run with a dead supply , starts and runs fine. checked the fuel pump fuse in the engine bay and have discovered that the fuse has been linked with a piece of wire.

How is the power suplied to the relay is it through the fuse first or is it relay first , and how is the car running if the relay isnt powering up?

 

Appreciate any help with this folks

hold it a mo , the relay will power up when the ignition is on surely not all the time, so how was my central locking working using that wire

Could be a permanant feed to the relay?-have you stuck a tester on it? :)

just been peeing around with my multimeter, the feed to the central locking is fron the power out on the relay, i have no idea how the central locking has been working so far as the relay isnt energised till the ignition is on , other than i have a dodgy relay that was powering constantly, new relay time and rewire of central locking on i think, damn the dodgy fitter who did the central locking

think im working this out now, the fuel pump relay has a full time supply but requires the ignition to earth to energise, think mine has been faulty by allowing voltage through but without the ignition earth the fuel pump hasnt been energised, wel i am hoping that anyway,

wired the central locking into a 12v constant this morning so thats fine, just concerned about why soneone has put a jumper across the fuse connections for the fuel pump, any ideas on how much a new relay and fuse is?

they probably blew the fuse when it was getting wired in, then rather than replace the fuse, they linked it out. either that or the load on the solenoids was too much for the fuse and kept blowing.

i would replace the fuse with one of the correct rating and make sure it doesnt blow again.

it sounds like there isnt actually a fault with the relay tho.if the car runs and the fuelpump turns off with the igniton then its fine.

 

Fraser