Battery light on and voltage gauge reading low. Engine will start but dies quickly or cuts in and out when running. Changed battery, alternator and negative cable but problem still there. Starter, map sensor ,aircharge sensor, coil, pugs wires cap and rotor, have been changed within last 7 months. I don't see any problems with the fusible links( if it's visible). Any helpfull info would be appreciated.

 

Start back at the beginning. Verify the battery is good and the alternator is working properly. Assuming you have that horrible 2G alternator, also check the connectors that plug into the alternator. Ford issued a bulletin years ago advising to always replace those connector anytime they are removed from the alternator. EXTREME fire hazard if you do not.

If you have added power hungry accessories such as stereos, amps, lights you could very likely pull more power than the puny 2G alternator can provide.

 

Do you have bat voltage to the alt at the black-orange wire? Key on or off doesn't matter.

If not probably have a bad fuse link (one you'd be looking for should be green), a fuse link doesn't have to be burnt to fail. The crimped connection at either end can corrode creating an open circuit.

Quick easy test to see if one is burnt, "pull" on the fuse link if it is the casing will stretch indicating it is toast.

Also possible recent work at the relay left that one connector off, no power to the alt.

 

It turned out to be the alternator fuse link, thanks a lot.