How do I check for a battery drain?
Probably been asked a million times on here but can someone tell me how to check if I have a drain on my battery?
It currently keeps going flat every couple of weeks and is really annoying, car is a 1993 4x4 Sierra Cosworth.
Also can someone confrim what kind of voltage I should be seeing across the battery terminals when the engine is running and the alternator is charging?
Thanks