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[scottambrose]

thought it was my stereo which was turning itself on in the night but ive disconnected that aswell as the power sounder and the boot light. and still i keep getting a flat battery every few weeks. ive changed the battery for 3 different types. and all tested good each time, are there any other common drains on the omega it could b?

[Raymienets]

What about the Alternator have you had that checked?

[pauls]

This is a long shot but my old cdx had a battery drain on the sun visor

[scottambrose]

how am i going to be able to tell whats draining. its fine for a few weeks then its flat when i go to start in the morning. the alternator is charging ok

[Martian]

how am i going to be able to tell whats draining.

Put an ammeter in series with the battery and start pulling fuses one by one.

[scottambrose]

so i put the ameter in series and in theory i pull each fuse one by one until the meter reading drops. what should it drop to? and is there anything i cant test when the cars unlocked. ie alarm drain

[Kevin Wood]

Alarm drain doesn't change much whether unlocked or locked. Open the bonnet, shut all doors, fit ammeter in series with battery, then leave the car for 15 minutes or so for the consumer delay to expire. It should settle to 60-80mA.

[scottambrose]

i dont have a meter at present so did it with the 5 watt bulb trick and the bulb lit really brightly but went out when i removed the middle 80amp fuse from the box that sits on top of the battery. theres from left to right 1 80 amp a space then a green fuse then 3 more 80amps and i removed the middle one and the bulb went out.

then with it back in the removed every fuse from the fuse box under the steering wheel and only fuse 7 at the bottom right made a difference. any ideas?

[Martian]

Is there not an emblem on the fuse box cover showing what circuits are covered by what fuses?

[Kevin Wood]

F7 feeds the accessories connected to the consumer delay relay as far as I can see. Did you wait a good while to see if this went off?

I'm wondering if the timer circuit would have worked properly with the resistance of a 5w bulb in series with the supply, TBH.

Worth taking F7 out, and see if it discharges. You'll probably lose interior lights, etc.

[Dave DND]

Try a different battery -  Could be the plates are on their way out ?

 

[scottambrose]

this is the 3rd battery in a few months. the interior lights and windows etc all still worked with f7 removed. all it did was click alot when i removed the fuse and the bulb then started pulsing

[Kevin Wood]

Hmm. I think you need a proper ammeter on it, TBH.

[scottambrose]

Will sticking the ameter in the fuse slot work to show me the current draw

[Martian]

Will sticking the ameter in the fuse slot work to show me the current draw

Yes, but it won't pin down the individual component that is causing it.