As far as I can tell I have this ^^^^ model stereo in my 98 Dodge Grand Caravan and I would like to run it from an external battery - the vehicle has lots of AV equipment fitted in it by a previous owner, drop down screens, games console, TV tuner, VCR, DVD and a big AV distribution amp in addition to the (many) factory fitted Infinity speakers (and amps?).

If the vehicle has this stuff running whilst stationary then the battery gets too flat to start the motor pretty quickly - my wife is unfortunately very ill and I would like to be able to use the "toys" occasionally to entertain the kids whilst we're parked outside hospitals while she receives treatment.

I figured that extra "leisure" batteries were the answer as I have done in more basic VW vans in the past and I have no trouble fitting the battery, split charging, and rewiring the ancillaries - but I have no idea where to start with the factory fitted stuff! This all operates off the key, and I haven't even been able to figure out which fuse it operates off as I was hoping to simply back-feed it a permanent line from my auxiliary battery through the board without having to take the dash and interior out, it's all a bit of a plastic starship to me as I 'm used to archaic Euro' boxes!

Any help or advice will be very gratefully received, thank you.