One other way to do it without changing bulbs etc.
Purchase a DRL auto off relay,
Fit it to filter the positive feed on the reverse sensors.
You will then have a sensor feed on the relay box,
Extend this sensor feed to an insulated spade connector outside of the car,
And tape it on to the trailer socket.
Then on your trailer light bar,
Run a single feed from its reverse positive,
To a male insulated spade connector,
When connecting the trailer bar,
Plug in the extra spade connector,
End result will be:
When the trailer bar is connected; you put the car in reverse.
The relay will cence power in the censor feed and stop power flowing to the reverse sensors.
When the trailer bar is disconnected,
The reverse sensors will function as normal because there won't be any current flowing through the sensor line.
Sounds like an easier way around the problem rather than changing bulbs etc.
Here's a link to the DRL relay. http://www.genlabs.c...rlr/drlr1.html
They sell through eBay if you contact them, they cost between 10-12GBP
And some cable:
The cable is 2core and you will only need a single core for the sensor feed,
So purchase half the length of cable you require then seperate the cores using one for each side.
Anyways cable link: http://www.ebay.co.u...=item27bd5915eb
Then you just need a male and female insulated crimp terminal
Hope this helps and happy Christmas from Ireland
Ive fitted a genlabs DRLR1 to my rear fog light bulb because I've fitted dual reverse bulb units,
Now if my rear fog light is ON,
And I put the car in to reverse; the fog light automatically goes OFF for the duration that reverse is active
See my posts here:http://www.fordowner...mk2-mk25/page-7
I've also fitted a genlabs DRLR2 auto dimmer relay to my aftermarket gauges because they were blinding bright at night driving,
See here: http://www.fordowner...-gauges-or-drl/