How can I find Anitheft horn ouput short to ground B2496 on my 2001 ford focus

If that does not fix it, then it is not the fuel filter but at least a fuel filter is changed and then you get to change out the fuel pump. That sucks.

crank sensor located off the fly wheel in transmisson

i have ford focus ghia 2.0 2002 model and i have problem with the fuel pump sometimes it works sometimes it doesn't.. when i fill the tank petrol pores out, the pipe next to the filter also comes out, how do i fix the problem?

If you are talking about the fuel pump, you have only a few cheap fixes before blaming the expensive fuel pump. The fuel pump relay can overheat and kick out. A new relay could fix this. Autozone.com offers free fusebox layouts and wiring diagrams just for registering your truck with them for free.

Sometimes the horn relay will interchange with other relays. Look at the part numbers and use the horn to test the fuel pump relay. Or switch the 2 relays.

A fuel filter could be clogged and overloading the fuel pump. Put in a new filter.

After that, its a case of testing the fuelpump leads and see if the fuelpump is shut down.

I hope my solution helps.

you can try this:
It is possible with a P0232 for the fuel pump to be running continuously, even with the ignition off. If that's the case and you can hear the fuel pump running, you may be able to disregard some of the following checks. Turn the KOEO (key on engine off) and wait for a few seconds. This allows the PCM to complete it's fuel pump pre-cycle. Now, using your scan tool (if you have one) observe the FP VOLTAGE FEEDBACK reading in the datastream. This reading indicates what kind of voltage the fuel pump is receiving.
If you don't have access to a scan tool, use a voltmeter to read the FP voltage at the fuel tank. If your reading shows any voltage at all present to the fuel pump with KOEO (or if you can hear the pump running), remove the FP relay. If the voltage remains, or the fuel pump continues to run, then there is a short to voltage on the FP voltage supply circuit or on the feedback circuit. Repair as necessary. If the voltage disappears (or the pump quits running) with the FP relay removed then try replacing the relay with a spare one. Upon reinstalling the spare relay, if the voltage disappears, the relay was faulty due to a short. If, though, after replacing the relay voltage is still present, suspect that the PCM FP relay control circuit is shorted to ground.
Check for a short to ground on the PCM FP relay control (ground driver) circuit by removing the FP relay and ohm between a good ground and the PCM FP relay control. There should be no continuity to ground with KOEO (after the FP pre-cycle is completed). If there is continuity to ground the wire is shorted. Find the short to ground and repair as necessary. If you can find no physical short, It may be necessary to snip the FP relay control wire close to the PCM connector where it will be easy to repair and check for continuity to ground with KOEO coming OUT of the PCM. If there is no continuity the wire is shorted in the harness. But if continuity exists, the driver may be internally shorted to ground and the PCM may require replacement.

check the fuel pump fuse under the bonnet as these blow some times its a 15amp colour blue.

engine management fuse blow

The next step is fuel flow measurement. your description sounds like fuel starvation...this test focuses on volume over time.

Probably, you would have good flow, that would taper off and no longer be enough, after a short time...

have you plugged the fuel lines in and most important have you plugged the sender unit back in,if you have then it could be the pump as slightest ingression of grit can jam the pump up

My first suggestion is always recurring to a qualified mechanic.
In your particular case there is an issue with Focus fuel pump, and Ford guarantees free replacement in many countries, ask to your local dealer, to find out if you can have fuel pump replaced for free.
FORD FOCUS Recall - FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
2000-02 focus spi fuel pump problems - Focaljet
fuel pump in a 2000 ford focus SE
If you wnat to DIY, instead, buy the haynes manual, and follow step by step illustrated guide. Fuel pump replacement is not a complex operation.