How to bypass immobiliser in 94 ford falcon after ignition barrel has been replaced ??

the original key is coded to your car.
So changing the barrel to have a new key wont help and ill tell you why.
Inside the original key is a transponder chip that is programmed to the cars immobiliser unit.
Attached to the ignition barrel is whats called a reader coil and its job is to read the keys chip when inserted in the barrel to deactivate the immobiliser so that the car will start.
What you need to do is contact a good knowlegable locksmith to provide a new key and code it to your car

If you go to the Ford Falcon Forum and ask there politely I am sure people will jump in to help you. Here is the link....

fordforums com au

lot and lots of wire no really you can not bypass it

it needs to have a matching program for the ecm and the immobiliser. A new key cut to the existing barrel/lock and programmed to the vehicle ecm will solve the problem. Even if you get a new barrel and key you will still have to have it reprogrammed to the ecm and immobiliser system

check the battery in the fob as it may not be engaging the immobiliser.

HI
I hope that you still have the old key.
all you have to do is that: open up the old key/remote and look inside it for a small black rectangle piece, this is the immobilizer chip.
remove it carefully don't brake it, and place it inside the new key/remote, put a little glue on it

good luck

Ignition ballast resistor is usually mounted on the firewall near the back of the engine. It's white, rectangular, and has a wire connector on each end. It's function is to limit primary coil current during engine running. The ballast is bypassed during starting so you get a higher spark voltage. If you remove the ballast, you will burn out your coil.

if you look on this web site under ford escort their is a article or tip on how to bypass the immobilisor for this vehicle and trust me it is not simple ,its easier to have car taken to dealer and have it re-programmed

Unfortunately the ignition barrel has been replaced with a new key,which has not been adapted to the immobiliser.The three core wire is from the reader coil which is supposed to fit around the ignition barrel.Obviously the key head was taped in the right position for the reader coil to read the key chip.Now the immobiliser is doing its job and cutting the ECU to stop it from running.It will take persiverance to find the right position to tape key back to coil for engine to run.Then your local VW Commercial dealership can readapt your key.

check all the fuses 10 amp is pretty common same as radio fuse