Omega Owners Forum

Omega Help Area => Omega Electrical and Audio Help => Topic started by: dizaster on 12 July 2010, 10:02:03

Title: Mysterious Flat Battery
Post by: dizaster on 12 July 2010, 10:02:03
Hi alls.

Got up thids morning to find the car wouldn't start , suspected flat battery ,  but  why ??

Cars been running fine since I've had it  (4 weeks)

Yesterday we attached a towbar ( boot was open for quiet a few hours) ,
Wired the towbar electrics .

Car started when I drove it home .

BUT  this morning nothing  :-(

Cant recall if the boot has lights in it ?? ,  would this of flattened the battery if the boot had been open for ages  ??

Could connecting the towbar electrics (just a scocket on a lead) ,  have caused the battery to discharge ??

Any ideas  :-) ??

Ohhh took battery off to charge today  ,  anything  I need to be aware of when I reconnect it  ??

Many thanks .

Diz
Title: Re: Mysterious Flat Battery
Post by: Entwood on 12 July 2010, 10:20:25
Boot does have a light .. butdon't think that would flatten a battery in a few hours .. anyway it started and drove home.

My instant thoughts are the work done ... I wonder if something is remaining powered ?? 

Did you connect the 12N only (black 7 pin socket) or a 12N and a 12S (grey 7 pin for fridge/reversing lights etc) or a 13 pin socket ?

If more than just a 12N for road lights then you should have added either ignition controlled relays or a smartcom device, if either of those are faulty/in correctly wired they could constitute a drain on the battery overnight .. :(
Title: Re: Mysterious Flat Battery
Post by: Kevin Wood on 12 July 2010, 10:26:42
The boot light on mine times out after a few minutes. Not sure if the same on all models?

I would double check the towbar wiring if it goes flat again.

Kevin
Title: Re: Mysterious Flat Battery
Post by: dizaster on 12 July 2010, 12:50:14
just connected the Black socket, (12N?).

Used those blue  Scotch Connectors and connected the 12N wires to the harness directly ,  no relay or anything , was told I didnt need one .

Car is a '98 (R reg)

wondering if last nights  first night of rain  in weeks had somewthing to do with it   :P
Title: Re: Mysterious Flat Battery
Post by: RobG on 12 July 2010, 13:31:23
Quote
just connected the Black socket, (12N?).

Used those blue  Scotch Connectors and connected the 12N wires to the harness directly ,  no relay or anything , was told I didnt need one .

Car is a '98 (R reg)

wondering if last nights  first night of rain  in weeks had somewthing to do with it   :P
:o :o
Title: Re: Mysterious Flat Battery
Post by: Andy B on 12 July 2010, 13:50:02
Quote
just connected the Black socket, (12N?).

Used those blue  Scotch Connectors and connected the 12N wires to the harness directly ,  no relay or anything , was told I didnt need one .

Car is a '98 (R reg)

wondering if last nights  first night of rain  in weeks had somewthing to do with it   :P

No you don't need any relays, but there's better ways of joining wires than using Scotchlocks ie soldering them  ;)  ;)  ;)
Title: Re: Mysterious Flat Battery
Post by: dizaster on 14 July 2010, 17:43:39
LoL  only used the Scotch cause they came already connedted to the wiring harness :-)

Update:  Ripped the wiring out ,  recharged the battery, working fine now.

Checked the socket ,   no shorts between pins.

Next step (This weekend) , reconnect the 12N socket , probably using insulated crimp connectors , just cause i have some, and Im currently out of solder. 

Fingers crossed :-0
Title: Re: Mysterious Flat Battery
Post by: dizaster on 16 July 2010, 22:10:12
Starting to do my head in .

We re-connected the towbar socket tonight (No scotch connectors this time  ;))
,  checked for shorts across the pins , all A-OK.
Check the voltages , again all fine ,  but within an hour the car wouldnt start and I needed a jump- to get going again.

While we were connecting the jump cables ,  my friend noticed that the earth lead on the battery was VERY hot .

Anybody got any ideas ??

Cheers