One of my winter tasks has been to upgrade my trailer board lights to LED sealed units which tend to survive dunks in the sea and vibration better than normal bulbs. They now work and are brighter than the old standard bulb units, but:
- the "trailer lights connected" indicator does not show on the dashboard
- some LED's on the indicator and stop lights flash every second (I'm guessing a low voltage/ current bulb testing circuit)

does anyone know what value resistor I should add in parallel to each LED bulb to fix this please ?

something like this will do the job..

http://www.ebay.co.uk/itm/50W-6ohm-Load-Re...1250645634 ... - .- -.




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Here are a couple of other solutions.

http://www.linearelectronicdesign.com/

http://www.labtronx.com.au/

Gary

or just ignore it ....

My horse trailer has LED brake lights and they pulse dimly every few seconds ... really noticeable in the dark ... but at the same time as I walked up to it the other day it did strike me that it looked like the little red LED you get in the car to show the car is locked and alarmed. Almost as if the trailer was alarmed. V8 or else ...

What Stan said

I put LED's on my boat trailer so I didn't have to faff with a trailer board & those resistors worked just fine.

Many thanks all - found 4 suitable 50w 6 ohm resistors on eBay for £6.39 delivered.

I bought a camper trailer with LED tail lights. I towed it home without issue other than the 08MY L322 didn't recognise there was a trailer hooked up. The tail lights worked fine, including when night driving.

Today I towed it to get it registered. Before I left I inserted a test lamp with an incandescent bulb into the trailer loom to get the car to detect the trailer, which it did. After a short drive it felt wrong. The electric trailer brakes where on and burning. Also the indicators flickered fast and dash warned to check trailer bulbs. I took off the test lamp. The trailer continued to be recognised (mostly) and indicators flickered fast.

The trailer brake problem continued intermittently. I had the auto headlights selected. It was a rainy day and headlights turned on when it was darkish because of the weather. I worked out the trailer brakes activated when the lights came on. I turned the lights off and no issue. If I turned the parkers or headlights on I could feel the trailer braking.

I don't have an LED module.

Any suggestions about why the car lights activate the trailer brakes and why the L322 detects the trailer now but not when first driving it? Thanks ______________________________
Vogue tdv8 08MY poverty pack - wow

I've discovered the trailer socket set up in Australia is different to Europe. It looks like pin 5 is a tail light in Europe but a trailer brake in Australia. So that explains the brakes coming on with the lights.

However, I noticed the tranny was keeping low gears longer like the trailer was still attached. ______________________________
Vogue tdv8 08MY poverty pack - wow

Electric brakes - I guess that would be a problem.

For the rest, resistors should do the trick. LED's have almost no resistance/load, so the car electronics think there is nothing connected and therefore no trailer present