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wiring to auxillary battery

Posted: Tue Mar 27, 2007 8:55 pm
by FREDA ONE
hi is their a way to swap power from cigar lighters and interior lights and put to auxillary battery? :roll:

Posted: Tue Mar 27, 2007 9:15 pm
by francophile1947
Been discussed many times on forum - have a search under leisure AND battery.

Posted: Tue Mar 27, 2007 9:44 pm
by francophile1947
I've found Pippin's post on the subject - see below


OK guys and gals, here is how to do it.

The instructions are based on my new shape '99 AFT and are given without prejudice and with all the usual safety considerations regarding disconnecting the battery(ies).



Look at the fuse board by the drivers right knee.
Remove the fixing screws and wiggle it forwards so that the rear is visible.

Counting from top left to right the numbering goes 1 to 8.

Fuses 1 to 5 are fed by a thick white/red from fuse BTN under the bonnet, which is always live.
(the fuse, silly, not the bonnet!)

Fuses 6,7,8 are fed only when the ignition is on via the thick red/black wire.
6&7 are curtains L&R, 8 is cigarlighter & mirrors.

1] If you do not have a secondary battery:

You can either select just the cigarlighter/mirrors or probably easier and handier select those and the curtains so that you can operate them without the ignition on.

Cut the thick red/black wire going in a couple of inches from the rear of the fuseholder for 6,7,8. Insulate the end that comes out of the loom.
Use a short length of similarly sized wire to extend the end going into 6,7,8 and tap it into the thick white/red that feeds fuses 1-5.

If you want to select just fuse 8 for the cigarlighter/mirrors then you would have to identify the blue wire coming out of fuse 8, cut that and insulate the end coming out of the fuse 8. The blue wire going into the loom would then need an in-line 15A fuse fitting and then tapping onto the aforementioned thick white/red that feeds fuses 1-5.

2] If you have a secondary battery you may wish to feed things from that rather than from the engine battery.

The instructions above are modified only by disregarding tapping anything into the aforementioned thick white/red that feeds fuses 1-5.
Instead you would need to connect it/them into an appropriately fused wire connected to the secondary battery.

While you are at it you could also feed all the internal vehicle lighting from that source as well.
To do so, cut the blue/red wire coming out of fuse 1 and insulate the end coming out of the fuse. Fit an appropriate 10A inline fuseholder to the end disappearing into the loom and connect it to the secondary battery.

So, there you have it! If in doubt - ASK!

Posted: Tue Mar 27, 2007 9:51 pm
by pippin
That's another fiver that someone owes me!

auxillary bat wiring

Posted: Tue Mar 27, 2007 10:05 pm
by FREDA ONE
thanks alot for help great advice,will give that a go. :D

Posted: Tue Mar 27, 2007 10:21 pm
by jimsmimm
let me know how you get on FREDA ONE ,I got this off pipin ages ago and have been threating to do it as soon as the weather improved and it just did..... :shock:

auxillary bat wiring

Posted: Tue Mar 27, 2007 10:31 pm
by FREDA ONE
no probs jimsmimm, i will have a go at weekend.
:D