XF0747 69 Posted September 9, 2014 hey all this has prob been covered before but thought i'd ask driving the xf the other day and got told had no brake lights got to a servo checked fuse - all ok got to my mates shop (around the corner from servo) checked globes - all ok have got parkers etc etc no brake lights checked the brake light switch and have power going in and power out when pedal pressed i havent got the trip computer connected, will this cause the lights not to work? any info would be helpful cheers Share this post Link to post Share on other sites
93xf 2 Posted September 9, 2014 I believe the brake light circuit runs through the trip computer. Solved the problem by bridging two of the terminals in the plug that once went into the trip computer when I removed it. Hope that helps . Share this post Link to post Share on other sites
XF0747 69 Posted September 9, 2014 do you remember which terminals Share this post Link to post Share on other sites
93xf 2 Posted September 9, 2014 Nah I don't. Whichever terminal has power feed on/off with your foot on/off the brake bridged to whichever other terminal turns your lights on (foot on brake of course)should do it. So it's a two person job. Share this post Link to post Share on other sites
XF0747 69 Posted September 9, 2014 cheers man will have a play with it tomorrow night 1 xr6tjet reacted to this Share this post Link to post Share on other sites
xd4.1efisc 34 Posted September 9, 2014 Bridge the 2 Green/Red wires in the trip computer plug. Share this post Link to post Share on other sites
Mr Polson 10,214 Posted September 9, 2014 Yep, its because the trip comp is unplugged. As said, the brake circuit runs via the trip comp, that's how the Stop Lamps light gets it power. Share this post Link to post Share on other sites
xr6tjet 98 Posted September 10, 2014 George it's because your trip comp is unplugged and the power gets directed through it for the blown globe warning, as mentioned by others you need to bridge the two green/red wires at the trip computer connector and it should fix your problem. Share this post Link to post Share on other sites
XF0747 69 Posted September 10, 2014 all fixed guys, cheers for the pointers plugged the trip computer back up and all good i've had it disconnected for over 2 years, surely all the times i've driven it since i had it unplugged someone would of told me the lights weren't working Share this post Link to post Share on other sites
PRO250 1,506 Posted September 10, 2014 Or more to the fact how did you go 2 years and not know yourself? Share this post Link to post Share on other sites
XF0747 69 Posted September 12, 2014 90% of the time i have driven it i have been by myself and its always been short trips i was lucky this time that someone actually told me i had no lights Share this post Link to post Share on other sites