I have been having the battery light & abs light flicker on and off alot recently, also the dash lights & head lights stay dim all the time unless i put my foot down and take it above 4000rpm then the lights get bright again, but this goes dim again after a minute...
Ford said I had a faulty alternator so they replaced that checked the cabling and they said everything was fine.. Still had the same problems after they done that, now they seem to think it must be the a faulty PCM but there are no fault codes...

What do you guys think and where is the PCM located?
They asked me if it had been chipped as they said this can cause the PCM to malfunction over time....Obviously I said no..