Thread: Silly? Question reTailer LEDs and Resistors

I made my own switched unit for in the D4.
Had my own in-line external boxes until I made the mounted / switched unit.

I’ve been looking at making it automated switching, and have the solution. Just cannot be bothered - easier to flick the switch.

Good question. There is a very long thread (33 pages of) at < Discovery 3 LED trailer lights > relating on this for the earlier Discovery 3 models. Amongst it is some Discovery 4 specific discussion but it does get lost within the volume etc. I haven't seen anything specific to your question in there but I'd assume that if the trailer light is on on the dash then the vehicle is in trailer mode with everything adjusted to suit.

What electronic setup and switch did you go for? DIY or off the shelf product?


Off topic, but relating to all this:

Tombie does make up some electronic boxes that can be fitted to the vehicle to resolve it. I've flicked him a few messages to purchase over previous months but not heard back. Instructions for DIY are also included in that thread.

Alternative options are:

Auto Elec Oz offer ELECTRONIC LED TOWING MODULE | AutoElecOz which looks to be a neat fitment.

These mobs offer a device that goes inline between the trailer and vehicle electrical connections - Land Rover Discovery 4 / LR4 (L319) LED Towing Adaptor Module and Buy Now: Linear Electronic Design - personally I'd rather have a single solution on the vehicle than one for each of the trailers which are shared over multiple different vehicles.

There's two other on vehicle fitment options that I've seen but cannot find links to right now.

For down here in Tasmania flat 7 plugs are the norm on trailers, but the D4 has round plugs - so perhaps an adapter with the built in resistors and a strong magnet on the box to secure it to the metal draw bar of the trailer would be a relatively convenient solution.