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LRnovice

Member Since: 08 May 2008
Location: Cardiff
Posts: 64

2008 Defender 90 Puma 2.4 CSW Auto Belize Green

Radio code

After leaving the car for over one week when I tried to start the car it started easily with the battery easily turning the engine over but the radio was dead. It had lost the code. On re entering the code the radio worked perfectly. The battery hadnt been disconnected and no work had been done on the car.

This has happened twice but only if I leave the car idle for a number of days. If I drive the car every day the problem doesnt occur and there is nothing to suggest a bad connection because there is no interference or breaking up when I am driving. I cant understand why it would lose battery connection when standing still. Any suggestions

19th Mar 2025 5:42pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20681

Is it the original LR radio? TheThunder Rolls🇬🇧🇺🇸
⛽️🛢️⚙️🧰💪

19th Mar 2025 8:05pm

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 2204

Is it loosing the radio channel presets as well?

Ps remove and reinsert the fuse for the radio, sometimes the holder can lose grip, sometimes the fuse works a little loose over time. If there is a loose fuse or bad connection that causes a High resistance it can be overcome with the engine running due to the alternator higher voltage, however an ageing starter battery will slowly drop voltage and may not overcome the HR issue after a few days.

Just a thought .

19th Mar 2025 8:28pm

LRnovice

Member Since: 08 May 2008
Location: Cardiff
Posts: 64

It is the original LR radio and when it loses the code nothing works. Its only when I uses the one hour on option then enter the code using the presets that the radio starts to work.

I dont understand why its only when the car is left idle for a week or so that it loses the code. The battery is almost new and is fully charged.

Another thing that used to happen but doesnt happen so much now was if the radio was switched on using the ignition the sound would break up and display flash until I heard a click from somewhere behind the dash then radio would work perfectly. Baffling

21st Mar 2025 2:50pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20681

Check the fuse in the fuse box isn’t loose, might be a good idea.
Also, in the situation when it happens, check what voltage you are seeing at the fuse.

If that checks out, then you might want to check the radio plug itself then beyond that.
In the mean time, it might pay to take it out to have room to check these things at a later date.

Voltage drops when sat, but should still be in range, so it sounds a bit to me like a high impedance connection somewhere, but there is always the possibility there is a radio fault internally. TheThunder Rolls🇬🇧🇺🇸
⛽️🛢️⚙️🧰💪

21st Mar 2025 4:02pm

LRnovice

Member Since: 08 May 2008
Location: Cardiff
Posts: 64

Many thanks everyone for your advice

24th Mar 2025 9:13am

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