Search for how to diagnose parasitic power drain.
You have to determine that the various computer systems are entering sleep mode and remain in sleep mode.
You could also try removing fuses to nonessential circuits, e.g. power ports, radio, etc and try to identify the circuit causing the issue. It helps to have a hall effect DC current probe to speed the process.
Mostly a battery discharges because something is switched on rather than a short circuit, although it is possible damaged wiring could bridge two circuits.
If the radio has been replaced recently - some radios aren't suitable for some vehicles and a discharged battery over a period of a few days will be the result.
It would have been helpful if you had told us the size of the battery (amp/hour) and how long a fully charged battery takes to discharge?
This would allow us to determine the approximate size of the discharge, though this can and should be determined by connecting an ammeter in series with a battery lead - if a thorough visual inspection reveals nothing, the discharge will clearly be seen on the meter so the fuses can be drawn in turn until the discharge disappears and so the guilty circuit will have been discovered. The next stage will be to investigate everything on that circuit...
It is unwise to delve very far when troubleshooting electrics on a modern computerised vehicle without reference to a wiring diagram.
SOURCE: 2006 Corolla LS battery continual drainage
difficult to accurately *****, you need to get the charging checked, even though you have a new alternater the problem could be as simple as the charging light not working, which causes the alternater to initiate. or you may have an electrical component staying on draining the battery.
SOURCE: 1999 land rover discovery series 1 does not hold charge.
Maybe,
Terminals are old POS that no longer conduct. Hit your local auto parts store and buy some new Terminals. Get something that Is a strong Conductor. I suggest Brass. Also Its Important to get the right size Terminal. I would also put money on your Main Power Wires being real heavy gage that will not fit into a generic Terminal. So make sure you get a terminal your gage of wire will easily fit into to avoid head ache and the hacking of your nice heavy gage Into lets say Civic gage to fit a too small terminal which mind your will work However you will have less power weaker connections ultimately Find your self with a car that will not start. It does not hurt to also sand any white crude or rust that would further interupt your new connection, Complete that and she be ready to fire up and hand you your next task.
Good Luck,
SOURCE: Radio in 2000 Land Rover Discovery
THERE SHOULD BE A RADIO CODE CARD WITH THE VEHICLES PAPER WORK.IF NOT U HAVE TO CALL THE DEALER FOR THE CODE.
SOURCE: how to program a keyless entry for land rover
MOST OF THE TIME WHEN YOU HAVE PROBLEMS IN THE REMOTE AND KEYLESS ENTRY.THE DEALERSHIP HAS TO REPROGRAM IT.BUT FIRST CHECK ALL THE FUSES AND RELAYS.IF THEY ARE OKAY.THEN DEALERSHIP HAS TO FIX.
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