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· Registered
1 Posts
Discussion Starter · #1 ·
So i just changed out the battery to a brand new one, professionally installed etc etc, and my dash is lit up like a Christmas tree It won't come out of 4low, dropped to access height and won't let me select special programs...

my dash looks exactly like this:

non of this has even been a issue tell this battery change.

is it a voltage issue or what?

any help would be appreciated.

· Registered
662 Posts
Try a hard reset.

Below is instructions for a hard reset. It costs nothing, does no harm, does not wreck anything, and sometimes even solves problems.

I have had what you describe happen just from disconnecting the battery and the hard reset seems to resolve the problem. I think maybe the tangle arises from disconnecting the battery before the vehicle has gone to sleep and then when it looses power, the computers get all mixed up.

Hard Reset Instructions

In brief, to start the hard reset process, open the hood but close all doors and let your 3 go to sleep - no radio display etc and no key in the ignition. This will take a couple of minutes and do not open any doors until the reset is completed. (I find that it is often a good idea to have the drivers door window rolled down and the key in my pocket whenever fooling about the vehicle.) Also when I play with a car battery, I remove any rings I have from my fingers, also my watch.

Disconnect the ground battery terminal from the main starting battery.
Disconnect the positive battery terminal from the main starting battery.

The reason for this order is if a wrench or loose battery cable ends grounds to the body, no arcing or other bad things happen.

(I assume that you only have one battery in your 3. If not, disconnect the others as well and leave them disconnected until after all is done.)

Connect the negative cable to the positive cable. (NOT the battery.) To do this, you will need a short length, (a foot or so), of light gauge, (14 to 18 gauge AWG, insulated stranded copper), wire to span between the battery cable ends as there is not enough slack in the positive and negative battery cables for the ends to touch each other.

Hold all together for about a minute or more, (at least two minutes), as you are discharging memory modules within the engine computer and elsewhere. Then it is suggested you then just let all sit disconnected for say ten minutes, (minimum five minutes), prior to commencing to put the battery cable ends back on the battery posts per the following order.

Reattach positive terminal to the main starting battery positive post.
Reattach negative terminal to the main starting battery negative post.

Start engine and hopefully none or at least fewer warning lights and the radio when turned on plays music rather than being silent.
Reset time on the radio - note that the station presets are still there as not everything is erased. Nothing much else needs resetting either.
You can also now connect up the other batteries if you have a multiple battery setup.

This is a link to a thread in disco3 re the hard reset procedure. DISCO3.CO.UK - View topic - Hard Reset

DISCO3.CO.UK - View topic - Hard Reset

This is a link to a thread on Disco3Club re the hard reset procedure.
Disco3Club The Discovery 3 and 4 Owners Club ? Login
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