Thread: LED trailer - weird braking and other stuff

Wot wattage is the test lamp you are using to decoy the system?

Should be 21 watts

Im not sure, its a $2 cheapy screw driver type with wire and small alligator clip.

I took it off on the way to transport dept. However, L322 continued to detect the trailer without the test lamp fitted.

Im temped to buy a trailer board to see how that goes.

I assume that the L322 is the same as other LR products, such as the D4, which have Euro trailer plugs and wiring.


If so, there is a tail light wire which connects to the brake wire on Australian trailers, pin 5 I think. Hence, when the car tail lights are on the trailer brakes are on at full voltage. The wiring has to be modified to suit Australian electric trailer brakes. At least it sounds like that problem, although you mention that you drove at night with no problems previously. Maybe you didn't notice the brakes on at that time?


I assume that you don't yet have a trailer brake controller or you would have already come across the problem when trying to wire it up.

Thanks, I'll check it with the test lamp or multimeter.

I got this from the Labtronx website. "European manufacturers use European wire colours and uses, their wire colours and uses are not the same as the Australian Standard. European regulations E/ECE/324 &; E/ECE/TRANS/505 stipulate two separate tail lighting circuits. The Australian standard has only one tail lighting circuit on terminal #7 therefore your vehicle's wiring may need to be modified. I believe the manufacturer/dealer should modify a vehicle’s wiring to conform to Australian standards before delivery. This is usually done inside the vehicle by cutting off and isolating the right hand tail light wire from the vehicle’s lighting controller going to pin #5 of the trailer socket and then connecting the right hand and left hand tail light wires together so that both wires go from the lighting controller to pin #7 (this re-work has been successful with Land Rover vehicles - other makes?). After the above re-work has been carried out, the wires to pin #2 and pin #5 (if of sufficient amperage capacity) may be rewired for other uses."

Originally Posted by rar110

I took it off on the way to transport dept. However, L322 continued to detect the trailer without the test lamp fitted.

Totally disconnecting the trailer plug with the ignition off then cycling the ignition on then off before reconnecting the trailer plug may clear the trailer-connected condition. However you probably have already detached the trailer so just try connecting it again (w/o trickery) to see if it has reverted to no-trailer attached.

Originally Posted by Graeme

Totally disconnecting the trailer plug with the ignition off then cycling the ignition on then off before reconnecting the trailer plug may clear the trailer-connected condition. However you probably have already detached the trailer so just try connecting it again (w/o trickery) to see if it has reverted to no-trailer attached.

I drove it today. The auto was staying in lower gears longer like it thought the trailer was still connected.

Staying in lower gears longer could be learnt behaviour from having towed whereas reconnecting the trailer would be proof one way or the other.