2003 ford focus dash lights go off fuel and speedo

No it's not it works on the can. Controller area network.
suspect battery fault or more likely the instrument cluster is at fault.
do all gauges drop and the speedo reading is just dashes?
if so this is a cluster fault. Sorry!

I would say, get the fault codes checked, the engine need the speed signal, to run properly , so take it from there.

connection on the back of the dash needs cleaning if you push on the dash and it all works then this is the fault. sometimes hitting it works just fine for awhile but not to hard.

try to focushacks.com a lot of tips are there!

My 04 Ford Focus the battery light keeps coming on & going off, have fitted a new alternator belt but it didn't solve the problem. The battery connections are good. Also the rev counter, speedo & mileage clock keep going haywire when the battery light is on. Do you think it is the alternator? Or is it some other common problem?

you have to remove the instrument cluster/part of dash to reach them

would change the ECU with the chip from the key from a car in scrapyard ,but before you get carried away try another seperate earth on the back of the speedo printed circuit board ,i wouldnt mind betting this is your problem

Common fault on FORD

Usually due to a poor connection in the YELLOW PLASTIC CONNECTOR underneath the passenger seat.

Just push it together properly and it should clear the AirBag fault

ive got a 55 plate 85 T260 swb crewcab 68000 miles, , i bought it 12 months ago, red light flashes on dash board most days, some times arratically, sometimes quite slow, and all clocks, speedo and dash does not work?????????
the smallest scratch and the van rusts, no under seal, there just a use it and dump it van.

i would just like to say fords are ****

check sensor on gearbox