ford mondeo 1800 y reg?

use an old light like indicator with holder and some wire,open bonet turn every thing off esp ignition remove key,disconect earth wire from battry place bulb in series between battry and earth conection,, -*-.if bulb lights up start removing fuses,just remove one if light still on refit then move on until it goes out what ever is on that circuit is falty or wiring falt,would start with altanator lead disconect feed wire and multy plug,usual suspect and radios,dont mudle fuses up,

steven,s
January 2012

If you dont have something like a power coolbox plugged in, Go for a free battery check somewhere kwik fit or the likes. Might not be charging fully, check alternator output, Or they may do that for you aswell

SD
January 2012