Flat Battery

[deeps48]

The Battery on my Jeep Grand Cherokee keeps going flat despite the battery being only a year old.Anyone got any ideas to sort out the problem??

[frugalfred]

Check the drive belt tension - the belt that turns the alternator.

[tonyav]

Does your ignition light glimmer faintly while the engine is running ?, if it does them it's probably an alternator fault, or have you got any interior lights that are stuck on, maybe in the boot or the glovebox ?.

[TWR]

Is there a warranty with the battery? if so, get the battery checked by the people who sold it to you. (Faulty battery)

[chas2008]

a) get someone to check the battery, many car parts shops offer this service.
b) get the alternator output checked.

If both these are ok, there is battery/current drain in which case an auto electrician will be required, in reality though this i quite rare. The chances are its one of the above.
The red light isnt always a charging light like in the old days its an ignition light it so gives no indication of a charging failure.

[Bazile]

//Does your ignition light glimmer faintly while the engine is running ?, //

Doesn't the ignition light go out , once the engine is running ?

[Hopkirk]

It should do Bazile.
That is Tony's point.

[Hymie]

Be aware that this vehicle also has an engine-bay light (mounted on the underside of the bonnet), energised when the bonnet is open.

[deeps48]

thanks everone ..got some ideas now!...deeps48