Member Since: 19 Sep 2019
Location: Anglesey
Posts: 10
Electrical help for a newbie please!
Hi all,
Typically I’m away from our “new to us“, used Disco 4 HSE but the Mrs had/has the following faults...any ideas:
Arrived home in the Disco 4, turned off the car and went to start the engine again. The clock started spinning, interior lights flashed on and off with time with a clicking noise (guessing a relay) and she had a momentary caption on the dash saying low power...and then everything turned off. Wouldn’t start, key fob did nothing, etc
A friend checked the battery and found a heavily corroded positive terminal (we’ve only had the car from a garage a few weeks)
He removed the battery, cleaned it up and charged it overnight and it seems ok on the charger.
Even with the battery removed the alarm kept going off! Main fuse removed to placate the neighbours.
Key fob battery replaced with brand new.
Now nothing works with battery charged, cleaned and fitted. Nothing. Won’t start, nothing on the dash...
Any ideas forum hive mind? Of course thanks in advance for any help
Last edited by Jenksruss on 4th Oct 2019 11:59 am. Edited 1 time in total
2nd Oct 2019 1:01 pm
robpenrose
Member Since: 12 Jan 2016
Location: Surrey / SW London
Posts: 2138
might be worth a hard reset first, once the battery is ready to go back on.
Could the main fuse be blown if a fully charged battery isn't powering it up?
Current: D4 HSE
Previous: BMW Z4M Coupe
Previous: Land Rover Defender 90 CSW Td5
Previous: Land Rover Discovery Td5 ES
2nd Oct 2019 1:18 pm
Jenksruss
Member Since: 19 Sep 2019
Location: Anglesey
Posts: 10
Forgive my ignorance, what does the hard reset entail?
2nd Oct 2019 1:26 pm
robpenrose
Member Since: 12 Jan 2016
Location: Surrey / SW London
Posts: 2138
Current: D4 HSE
Previous: BMW Z4M Coupe
Previous: Land Rover Defender 90 CSW Td5
Previous: Land Rover Discovery Td5 ES
2nd Oct 2019 1:30 pm
Jenksruss
Member Since: 19 Sep 2019
Location: Anglesey
Posts: 10
Thanks I’ll give that a go first. Worth replacing the battery too?
2nd Oct 2019 1:34 pm
M3bobby
Member Since: 21 May 2018
Location: Sleaford, LINCS.
Posts: 857
Not to Q your friend but how’s he charged it and is he sure it’s ‘Charged’?
Last month my 6 month old battery died as a result of a Quiescent drain. It appears a cell in the battery blew and fried my Camera module causing the Quiescent drain. This then caused the already goosed battery to throw some weird indications. I was using a CTEK 5.0 charger which showed fully charged in 5 hours which it wasn’t. A further 72 hours of charging later, full indicated yet wouldn’t turn the engine. Popped into Halfords who checked it and it was kicking out 30Amps when it should have been 900. He gave me a new battery and 4 weeks later it’s still fine. New camera module on the way.
I would suggest having an outfit check the battery over before thinking the cars the fault.
And if it’s a YUASA, definitely get it checked out.
2nd Oct 2019 2:33 pm
Jenksruss
Member Since: 19 Sep 2019
Location: Anglesey
Posts: 10
Great advice, thanks
2nd Oct 2019 5:36 pm
Jenksruss
Member Since: 19 Sep 2019
Location: Anglesey
Posts: 10
A friend tried the hard reset to no avail...any other ideas?
2nd Oct 2019 5:53 pm
M3bobby
Member Since: 21 May 2018
Location: Sleaford, LINCS.
Posts: 857
Take the battery to Halfords and if it’s goosed on their tester, you can at least buy one while you’re there however there’s plenty of on line places that do good deals.
2nd Oct 2019 6:58 pm
Jenksruss
Member Since: 19 Sep 2019
Location: Anglesey
Posts: 10
Battery fried. Fitting replacement tomorrow. I’ve heard there may be a problem with the immobiliser or key fob recognition after replacing the main battery? Is there any way to solve this apart from getting Landrover involved?
3rd Oct 2019 1:34 pm
M3bobby
Member Since: 21 May 2018
Location: Sleaford, LINCS.
Posts: 857
If you have an immobiliser issue it won’t be due to the battery being replaced.
3rd Oct 2019 5:05 pm
M3bobby
Member Since: 21 May 2018
Location: Sleaford, LINCS.
Posts: 857
Oh and glad you have a fix
3rd Oct 2019 5:06 pm
Jenksruss
Member Since: 19 Sep 2019
Location: Anglesey
Posts: 10
Fingers crossed and thanks very much for your swift responses. A great welcome to the forum
3rd Oct 2019 5:07 pm
Jenksruss
Member Since: 19 Sep 2019
Location: Anglesey
Posts: 10
New battery fitted and not making a blind bit of difference. Alarm going off when fitted and then when terminal removed.
Doesn’t recognise the key either
4th Oct 2019 8:43 am
M3bobby
Member Since: 21 May 2018
Location: Sleaford, LINCS.
Posts: 857
Did your wife unlock the car with the key blade? The alarm going off could be a sign that the car thinks it should be locked.
Have you a second key? Replacing the vehicle battery should do nothing to the KVM and immobiliser, mine has been on and off dozens of times with no issue other than the alarm going off when I had to use the key blade to unlock the car. Then I would just use the key fob to lock and unlock the car which would reset everything.
I wonder if you have a fooked KVM which caused your battery to die.
You could try placing the key fob under the steering column trims as per the user manual emergency override procedure.
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