towing electrics

[ivantaylor41]

I recently changed from a Disco 4 to a 5 (2017). I tow a caravan and with the 4 everything worked perfectly, but on the 5, after a few minutes of towing the caravan sidelights stop working. All other lights continue as normal. When I stop the unit, switch off the ignition and then restart the sidelights come back on, has anyone had the same problem or have any ideas??

[Craigp]

Hi Ivan not noticed this happening on mine but then you may be more observant than me. I'm assuming when on main lights at night everything performs as it should?

[Craigp]

Further to my previous post. Just towed the van for a hour and half all lights stayed on.

[ivantaylor41]

Even when I put the main lights on the caravan side lights stay off unless I stop the car and restart it, then same thing happens. I had thought of a loose connection, but the side lights have separate leads as supply, but only one earth. Perhaps I should try connecting the earth to one of the other two on the 13 pin plug. Any thoughts?

[Craigp]

Sorry Ivan no idea. Certainly sounds like poor connection somewhere. Good luck

[Craigp]

Just seen this.

https://disco5.co.uk/forum/viewtopic.php?p=33306#33306

[ivantaylor41]

CraigP, sorry for the delay in response, just had 4 grandchildren staying for the week. Thank you for the link; it doesn't solve my particular problem but perhaps points more to the car (possibly software). I thought about the earth being faulty but since this also covers the brakes and indicators which keep working it might be something in the car which switches the lights off. I am not convinced either way. I will try checking with the car engine running, but not moving to see if the lights still switch off, at least it will eliminate a loose connection if they switch off.
Thanks for your support.

Ivan

[Craigp]

Hi Ivan so what happens to the lights when after they have switched themselves off but you stop but don't swt the engine off do they remain off would it be possible to check with a meter then to see if voltage has dropped to side lights?

[Barton]

Hi, sorry to hijack the post, but having the same issue. Start the car up with an Ifor Williams Horse Trailer, all side marker lights on, close the door and side marker lights go out.
Switch off and exit the car. Switch on and start, all side marker lights on, then go out when starting off. The other lights work fine. Does seem like a software fault to me.

Any ideas please.

Should have said tried a caravan and a cow trailer, and the same issue.

Many thanks.

[RYANNASH332]

Does anyone have a fix for this??

My discovery 5 has been very intimitant but recently it’s pretty much everyday!
I’ve got 4 trailers and same issue with all so confident the D5 is the issue!

Someone please help!!