Disco 4 LED Towing Module Problem

[Stevesonbeans]

Hi,

I know there are various related posts on this issue. Hoping to find someone with precise knowledge.

I have installed a Towing Module in my Disco 4 (2010). It is a CARM module. I preferred to install inside the vehicle for a variety of reasons. My Disco has LED lights and so does the trailer.

Bottom line is that it works fine EXCEPT that the indicators do not flash. They are constantly on when I indicate.

Any ideas ?

Steve

[Tombie]

So it doesn't work fine at all....

How did you wire it in? Where did you tap in etc...

Not enough info..

[Tombie]

Bloody hell... $149 and you had to cut into 5 wiring connections?

Please detail where and how you have wired it in and I scan help..

[Cambo_oldjaguar]

There is a fix for other models, might help you?

Have a look here http://www.aulro.com/afvb/freelander...d-adapter.html

[Stevesonbeans]

Thanks,

I cut into the brake, tail, L flash and R flash wires down the left side of the car that feed the trailer connector. The only slight oddity is that the brake light comes off the high tail light (advised by tow module manufacturer).

Those wires then feed the input side of the tow module. The outputs are then reconnected to the cut wires that feed the trailer connector. The tow module has it's own early and power supply (off the car battery).

I've tried to attach the wiring diagram.

Steve

[Grentarc]

What was the reason for purchasing this unit in the first place? Was it to overcome the D4 not detecting LED trailer lights? If so, this unit would not overcome this problem, as it looks to be designed to REDUCE current draw on the trailer loom.

[Stevesonbeans]

yes to ensure the LED lights on the trailer were detected.

https://www.gore-research.com.au/tra...r-modules.html

I'm pretty confident this is what they are designed to do.

One thought from the manufacturer is that during the off part of the indicator cycle the voltage doesn't drop far enough for the towing module to register an 'off' signal. Have tested it and the voltage flips between 12V ish (on) and around 0.5V (off). They sent me another towing module having been adjusted that should be filtering out these potential low voltages but it hasn't fixed the problem.

[Stevesonbeans]

by the way, I added the towing module without hooking up the trailer.
When I bought the trailer the manufacturer told me it would have trouble detecting with a Disco 4 so I went ahead with doing the modifications with the Tow Module.

I haven't tried putting it back to where I began to see if works without mods but everything I've read suggests it wont. I also tested on a mates Porsche Cayenne and it didn't work....

Steve

[Grentarc]

They state on their site that it draws an insignificant amount of current so that vehicle ECMs cannot detect it. What it provides is a separation of circuits so that high current trailer lighting bypasses the vehicles wiring (as the box provides power from the battery to the load). The D4 is looking for an extra 1.5 amps on the indicator circuit to detect a trailer, which even if it used PCB mounted relays (over FETs), this unit would not draw enough current.

[Grentarc]

What you need is something like this
http://www.aulro.com/afvb/l319-disco...ml#post2225314

Chris has put the load resistors in the vehicle and activated by a switch so that with no trailer on, switch off, when hooking up a trailer with LEDs, flick the switch so the load resistors are in the circuit.