Something draining my Renault clio battery?!

[Lauraamcerleann]

My clio was running fine until one day all lights flashed on the dash board and the car slowly died, got a new battery and was told I need a new alternator, got one and now the car starts one day and doesn't start the next. Mechanic has been at my house and left the car on charge over night, car started fine and then the next day car won't start again! Anybody any help or tips? Have checked the boot light to make sure that isn't staying on

 

[Burnerman]

When the battery is fully charged, disconnect it and see if it holds it's charge overnight.......if it does there's an electrical drain somewhere, as you suggest.
Next, leave the battery connected, but unplug the alternator. If the battery holds it's charge, then the alternator is faulty. If it still goes flat then it's an idea to remove the fuses one at a time to see how things respond.
John

 

[Lauraamcerleann]

It's an electrical fault somewhere we just know that much thanks john