enquisiter Posted March 24, 2014 Share Posted March 24, 2014 I have recently rewired my old style 12n + 12S plugs to a new 13 pin system. I have done this sort of thing before and am pretty competent. Everything works as it should, brakes, lights, indicators, fogs, reverse lights . .. except one strange fault. When i put the brakes on the caravan brakes light up but also the lights come on!! the lights work by themselves with no fault and the brakes work illuminating the second coil in the bulb but its just braking puts lights coil and brake coil on. I know this as i see the front van lights come on as i brake. Any ideas? am puzzled. Quote Link to comment Share on other sites More sharing options...
CommanderDave Posted March 24, 2014 Share Posted March 24, 2014 Sounds like a short in the plug or a bad earth. Check for any loose strands touching the next wire. Dave Quote Jeep Commander 3. 0 V6 CRD Isuzu D- Max Utah Auto Elddis Crusader Storm 2000 Kgs, Unipart Royal Atlas Mover . Link to comment Share on other sites More sharing options...
BrianI Posted March 24, 2014 Share Posted March 24, 2014 The side lights are either side of the brake lights pin so maybe there is a stray wire linking the two. However the left hand and right hand lights are in separate pins so it would be strange if both are coming on. Other cause may be a poor earth connection on pin 3. If it was working OK with the 12N/12S sockets then it seems the only way would be to disconnect the 13 pin socket and reconnect again. Brian Quote Link to comment Share on other sites More sharing options...
Dave60 Posted March 24, 2014 Share Posted March 24, 2014 Bad earth Quote Link to comment Share on other sites More sharing options...
DACS Posted March 24, 2014 Share Posted March 24, 2014 As has been said, it is almost certainly a bad earth connection to the combined tail/stop light bulbs. When power is applied to the tail lights it finds a return path through the stop light filaments and vice versa. The stop lights filaments are 21 watts but the tail lights are only 5 watts. As a result, the lower stray current through the stop lights is too low to light them. However, the stray current from the stop lights is sufficient to light the tail lights. Quote Link to comment Share on other sites More sharing options...
MPG Posted March 24, 2014 Share Posted March 24, 2014 Bad earth Would agree. Had water ingress into the socket on the jeep which whenever I braked caused the marker lights to come on was well. Quote VW Touareg 3. 0L V6 262 R Line with a Unicorn IV Segovia trying to keep up! Link to comment Share on other sites More sharing options...
bmwbrooks Posted March 24, 2014 Share Posted March 24, 2014 Bad earth, somewhere Quote Honda CRV 2009 & Bailey Pageant Bordeaux S7, 2008 Link to comment Share on other sites More sharing options...
Lefthand Down Posted March 24, 2014 Share Posted March 24, 2014 Bad earth return. This will cause the power to take the quickest way back to complete a circuit. In your case via the other light circuits. Quote Ford C-Max and Coachman Festival 380/2 SE 2006 Motto Carpe Diem Still trying to find the perfect pitch. ..110 amp Battery+ 65 watt roof mounted Solar and 25 watt Wind Turbine. LED lighting. Status Aerial 315. Loose chattels marked with UV,. Safefill Gas Fitted. Link to comment Share on other sites More sharing options...
iansoady Posted March 24, 2014 Share Posted March 24, 2014 Another vote for bad earth. Quote Ian. 2013 Freelander 2 SD4 Auto / 2005 Bailey Pageant Vendée; 1952 Norton ES2, 1986 Honda XBR500 Link to comment Share on other sites More sharing options...
TonyJover Posted March 24, 2014 Share Posted March 24, 2014 I'd say it was a bad ea. .. oh. . Quote Link to comment Share on other sites More sharing options...
tictag Posted March 27, 2014 Share Posted March 27, 2014 +1 for bad earth. If we get 100,000 votes we can have the topic discussed in parliament. Democracy in action. Quote Link to comment Share on other sites More sharing options...
WispMan Posted March 27, 2014 Share Posted March 27, 2014 Mr. B. Earth is our local candidate for an MEP. His is the Green and Yellow Party :) Quote Graham Unless otherwise stated all posts are my personal opinion Link to comment Share on other sites More sharing options...
lowedb Posted March 27, 2014 Share Posted March 27, 2014 You should check. .. Oh. Beat me to it. This used to be VERY common on cars. Quote Link to comment Share on other sites More sharing options...
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