With a configured trailer module, does the reversing light on the 2008 FL2 come on when connected to a trailer as well as the light on the trailer, if there is one? Or is it like the fog light and stays off while the trailer is connected? My trailer is some way away from the car at the moment so I can’t easily hook it up to check.

all my lights work as normal except the fog light when the trailer is connected.

Richard FL2 07 TD4 GS Auto
Ex 02 TD4 Auto

Thanks, Richard. I thought that was probably the case but thanks for confirming it.

If you have a black 7 pin socket then the fog light should work not the reversing light which should work with the gray socket.
If you have a 14 pin socket then ignore what i said  Common sense isn't very common.
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2007 Land Rover Freelander2 I6 hse Auto

"If you have a 14 pin socket then ignore what i said "



....... as the socket only has 13pins

Of course it only has one earth wire.

DOH  Common sense isn't very common.
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2007 Land Rover Freelander2 I6 hse Auto

count the earths ....

Click image to enlarge

confused now if there are two earths (which you show there are) then what is missing from two 7 pin plugs? Common sense isn't very common.
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2007 Land Rover Freelander2 I6 hse Auto

Last edited by axle on 2nd Jul 2022 6:50 pm. Edited 1 time in total

We can forget about the 13 pin wiring as it’s not relevant to my original question. My reason for asking was to see if I could find a power source that’s live when reversing except when the trailer is attached. So the next possible source would be power to the rear parking sensors which do switch off when the trailer is connected. The parking assist ECU is powered from fuse FB1 in the rear fusebox. If I were to hook up a fly lead to FB1 would it only be powered when there was no trailer attached? In other words, is the cut in power to the parking assist ECU when the trailer is attached before or after the fuse?

axle wrote:

confused now if there are two earths (which you show there are) then what is missing from two 7 pin plugs?

There are three earths in a 13 pin socket: one for constant power, one for ignition switched power, and one for the road lights.

The 12N has one earth for the road lights and the 12S has one earth for both power circuits plus the reversing light.

Edit: The post 1998 12S has two earths - one for permanent supply and one for ignition switched supply and presumably the reverse light earths through one of these.

Ok the worlds gone mad.........or i have  Common sense isn't very common.
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2007 Land Rover Freelander2 I6 hse Auto

No, it’s all very straightforward, especially the modern 13 pin plug.

Simon J wrote:

So the next possible source would be power to the rear parking sensors which do switch off when the trailer is connected. The parking assist ECU is powered from fuse FB1 in the rear fusebox. If I were to hook up a fly lead to FB1 would it only be powered when there was no trailer attached? In other words, is the cut in power to the parking assist ECU when the trailer is attached before or after the fuse?

The PDC module in on the CAN , so the rear is switched off electronically inside the unit when the trailer is connected. I'm pretty sure the front PDC remains active when the trailer is connected, so the fuse can't be switched, or the front PDC would stop working.

What are you wanting to achieve? Maybe there's a work around you've not thought of?  Hyundai Ioniq 5 Ultimate. The family car.
2009 Rimini Red SE TD4. Gone.
2006 Tonga Green i6 HSE. Gone.
Audi A5 convertible, my daily driver.
1972 Hillman Avenger GT, the project.

Yes, I suspect it’s more complex than an on/off switch!

I’m planning to fit a reversing camera and it just seemed to be a neat idea to not have it come on if my trailer was connected as it would serve no useful purpose in such circumstances.

That makes some sense, however it will be easier to simply wire it up to the reverse lights, so it works wherever you're in reverse.
You will also find it is still handy to have a view of the tow hitch area, as you can use this to gauge how close the trailer is to the rear bumper when making tight maneuvers.  Hyundai Ioniq 5 Ultimate. The family car.
2009 Rimini Red SE TD4. Gone.
2006 Tonga Green i6 HSE. Gone.
Audi A5 convertible, my daily driver.
1972 Hillman Avenger GT, the project.

Last edited by Nodge68 on 3rd Jul 2022 12:40 pm. Edited 1 time in total