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Electronics In Car Entertainment (ICE), Sat-Nav, lighting, wiring etc.

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post #11 of 11 (permalink) Old 14th December 2006
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It is possible to recharge a battery in situ (which is handy if there is still some charge and you don't want to have to re-code stereo/sat nav/alarm/etc).
First and foremost check if the battery is a sealed-for-life type, or can be topped-up with water. If it can be topped-up with water, top up as necessary (also, check each cell with the hygrometer - if one has a much lower reading than the rest - the battery is a dud, and should be replaced.
If all looks well, and you are ready to charge, then carry on reading.
However, it is absolutely imperative that you follow this procedure;
1. Charger must be switched off.
2. Connect red clamp to positive (red) terminal first.
3. Connect black clamp to negative (black) terminal second.
These clamps must not touch each other or any part of the car/metal object.
4. As the circuit is now complete, switching the charger on, will restore the battery (if it is undamaged), but before you do so, check the following.
5. If it has openings to unscrew, then do so for the duration it is charging.
6. You will probably see on the charger, different settings relating to the battery - select as appropriate.
7. There will be an indicator which will show when it has been charged. Once it has, switch off the charger, then disconnect the clamps one at a time, negative first, then positive (again, do not allow them to come into contact with the car/metal objects).
8. Ensure the battery is sealed, then attempt to start.

I've used this procedure safely for both my classic cars which only get occasional use, however, if my instructions seem complicated, or you are unsure - then take the battery out (disconnect positive terminal first, then negative), and recharge as previously stated.

Hope that helps,


This job should never be complete - the day I think I've done it all, is the day I resign.

S.M.A.R.T. Technician
Currently in VelSatisfied's garage:
2005 FIAT Ducato 2.8JTD LWB Gran Volume, 2000 Kawasaki ZZR 1100 D7 'fullpower' in black + full GIVI & KAPPA luggage, 2007 MB R-Class 320 CDi Sport LWB uprated by Brabus to 300Bhp don't know if there's a 155mph limiter - will be fun finding out! 2004 Mercedes Vaneo 1.7 CDi Ambiente 7-seater
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