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pjcd4
5th August 2022, 09:27 AM
Hi there, the gremlins are playing with my 2016 D4 SE 3.0L / 8 speed Diesel - any help would be appreciated!


In the last week or so I’ve had intermittent warnings about the lights being left on (in the daytime). The first time I didn’t think much about it, but a couple of hours later when I was getting out of the car the warning came on again. I switched the light switch from AUTO to OFF, but the lights stayed on. Tried all positions with no success. Got out and looked around, the DRLs and rear lights were on. Locked the car, waited and waited, the lights stayed on. Unlocked, started the engine, stopped the engine, played with the switch, eventually got the lights to turn off. An hour later my wife comes home and tells me my lights are on.
Over the last week I’ve done a dozen short trips, sometimes the lights stay on, sometimes they turn off. Sometimes if I leave the car for a while with the lights off, the lights are on when I get back (always DRL and rear).
Sitting in the drivers seat when the lights come on / off I can hear a click from the glove compartment area - possibly a relay in the glove box fuse panel?


I did get one fault logged a few days earlier:
FCIMB-Audio Buttons - U3003-62 (2F) Battery voltage - Algorithm based failure - signal compare failure
And there is another without a date:
IPMB-Camera - U0140-08 (2C) Lost communication with body control module - General failure information - bus signal/message failure


Possibly related or not, A month or so ago, the green dash lighting around the gear selector knob started flashed randomly and intermittently. At first it was mostly on, flashing off and back on - maybe 4 or 5 times per second; then progressively over a week become mostly off occasionally coming on. All the other dash illumination is fine.


Maybe also related, over the last couple of years I’ve had half a dozen times when driving, the lights would flash on and off for no obvious reason. I always put it down to reflections or random shadows on the windscreen triggering the light sensor. Switching the lights from Auto to Off solved it. It did seem strange though, that the lights would go on and off half a dozen times or more in quick succession - and I thought there was supposed to be some kind of hysteresis delay.

Appreciate any thoughts / suggestions
thanks, Paul

BradC
5th August 2022, 12:04 PM
180187

Eric SDV6SE
5th August 2022, 12:08 PM
Sounds like alternator is on its way out. Have been known to cause all sorts of electrical weird behaviour Try a hard reset too, disconnect both battery leads and hold these leads together for 30 secs, (note the battery not be included in this loop).

pjcd4
6th August 2022, 04:25 PM
Thanks. Other than checking that it is making 14.something Volts, is there any other check I can do on the alternator?

irondoc
9th August 2022, 08:31 AM
Have you got a solar panel attached? Sometimes electrical things switch on when the voltage reaches a cerrtain level......

John_D4
9th August 2022, 09:59 AM
Another thing to check is your earth wire. Make sure there’s no corrosion either on the earth terminal or the point where it is bolted to the chassis.

veebs
9th August 2022, 11:04 AM
Random electrical gremlins all too often end up being a dicky battery or alternator - one is much easier to fix than the other. If it's pumping out 14+ volts, thats usually a good sign i think.

I see you have a Traxide kit - How old are the two (or three?) batteries in the car? Maybe try disconnecting the aux for a few days, and see how your starter holds up? Could be, if it's failed, that the aux is keeping things alive, but not without some side affects...

pjcd4
21st August 2022, 10:17 AM
Thanks for the suggestions so far. In fact I thought it was solved and the culprit was the solar panel. However, pulling towards Hay today and the problem came back.
Alternator is making 14.7V
Main battery is 3.5 years old
Second (Optima yellow top) is 6 months old.

I did the hard reset and left the traxide and second battery disconnected. The problems did not recur, so after 3 days I reconnected second battery which also meant It connected the solar panel. Problem came back, I took out the solar panel. All seemed good for a few days, and I've left the solar panel off.

All seemed good, no issues for a few days. Left Sydney yesterday, no problems. Then heading into Hay today, lights started flashing on and off.

I think I will get a new main battery in Adelaide.

Any other ideas?
Does anyone know a good Indy in Adelaide who might take a look?

Thanks

John_D4
21st August 2022, 02:58 PM
Yes, PCB land rovers. Can be a bit hard to get in to, but if you explain your situation they might squeeze you in. https://uploads.tapatalk-cdn.com/20220821/c7f679f46c322e02374dd0c46809fa23.jpg

DazzaTD5
21st August 2022, 03:11 PM
not reading the thread in great details, so just throwing out a thought.

*if the head light rotary switch on the right side of the dash is not connected, from memory the lights stay on.
*I wonder if a poor connection, dirty, intermittent etc plug on the back could cause this.