ford fiesta 1992

[kimballs]

ive checked all interior lights, indicators and other lights but something is draining my battery overnight, could you tell me what it is?

[KJN]

Alarm, Immobiliser, bad connection, the list goes on, its  a case of eliminating one thing at a time, you will get there in the end or its off to an auto electrician to give him money,Good Luck

[Tim Baxter]

Most good batteries should be able to stand the current drain of sidelights all night.  These total something like 30Watts (2.5Amps)  Not many electrical bits of a car continually draw a lot of current.  Electrical air con might but should be automatically switched off with the ignition.

Q, How old is your battery?  They do wear out and can be checked by a battery retailer or auto electrician.

Q. What current is being drained?  Connect an ammeter in series with one of your battery cables to read the current drain.  Calculate what type of component might use this current. e.g. Item (maybe lamp) at 24 Watts = 2 Amps, item (maybe lamp) at 12 watts=1 Amp.  Alarm system might be 6 Watts=0.5 Amps. etc.

[big val]

Make sure the light in the boot area goes out when the boot is shut as this might be staying on.