Home > Technical (L322) > HEADLAMPS stop working every 20 seconds ?? |
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BOBCUSSEN Member Since: 25 Nov 2012 Location: DORDOGNE Posts: 296 |
hi folks
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21st Feb 2013 6:09pm |
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Joe90 Member Since: 29 Apr 2010 Location: Hampshire Posts: 6399 |
Sounds like the canbus check routine for broken circuits at play. Don't know enough to offer a solution though, although maybe a battery disconnection routine (you are good at this now, eh?) may sort it. .
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21st Feb 2013 6:35pm |
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BOBCUSSEN Member Since: 25 Nov 2012 Location: DORDOGNE Posts: 296 |
HI JOE90, thanks for the reply, yes i might try that but i will wait to see if anyone else has heard of similar problems? i guess it is something silly ( hopefully ), but lets see what the lads can come up with as possibles. as a matter of interest, do you know where the sensor is that controls the auto side of the light switch? i assume it must be out in the open somewhere, so that it knows whether it is dark enough to switch the lights on . i suppose this could have thrown its rattle out the pram so to speak
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21st Feb 2013 7:22pm |
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Joe90 Member Since: 29 Apr 2010 Location: Hampshire Posts: 6399 |
AFAIK I don't have that option on my car. I'll have a look in rave, but guessing behind the rear view mirror? .
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21st Feb 2013 8:24pm |
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SteveyD Member Since: 11 Dec 2012 Location: Cheshire Posts: 352 |
Could be a ballast firing up, going faulty & cutting out before resetting and starting all over again? |
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21st Feb 2013 9:09pm |
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Joe90 Member Since: 29 Apr 2010 Location: Hampshire Posts: 6399 |
Also check out the LCM module (under A pillar cover by accelerator pedal) .
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21st Feb 2013 9:15pm |
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Cam-Tech-Craig Member Since: 04 Aug 2011 Location: Gloucestershire Posts: 16171 |
LCM needs to have a battery reset before you can diagnose any further... |
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22nd Feb 2013 9:31am |
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BOBCUSSEN Member Since: 25 Nov 2012 Location: DORDOGNE Posts: 296 |
HI GUYS, firstly what do you mean by a ballast fireing up? and regarding the LCM, should i do a re disconnect with the battery first?
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22nd Feb 2013 6:47pm |
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Joe90 Member Since: 29 Apr 2010 Location: Hampshire Posts: 6399 |
If you have xenon bulbs you will have a ballast thingy on the back of the headlight unit that beefs things up to 50,000 volts. If this has gone on the blink (excuse pun) could be problem.
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22nd Feb 2013 8:31pm |
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ebajema Member Since: 24 Mar 2011 Location: New Plymouth Posts: 4782 |
Could also be a simple relay but since FFRRs don't use them anymore, it is most likely the LCM (that does all the relay and fuse type stuff these days). So faultcode reading is quite important here and keeping an eye out for a new/used LCM. MY 2010 5.0 SC Galway green and sand interior!!
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22nd Feb 2013 9:13pm |
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BOBCUSSEN Member Since: 25 Nov 2012 Location: DORDOGNE Posts: 296 |
HI everyone thanks for the replies, yes i think also it has to be something that has control of both lights as you mention.
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23rd Feb 2013 2:06pm |
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BOBCUSSEN Member Since: 25 Nov 2012 Location: DORDOGNE Posts: 296 |
with regards to the battery re connection bit, i have just looked at John's 47p2 post, and he explains to also join the poss and neg cables together, which i believe is to discharge all holding power from the system
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23rd Feb 2013 2:19pm |
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Joe90 Member Since: 29 Apr 2010 Location: Hampshire Posts: 6399 |
Yes, you can try touching the + and - cables together when off the battery, this is supposed to help clear down the ECUs.
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23rd Feb 2013 5:27pm |
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BOBCUSSEN Member Since: 25 Nov 2012 Location: DORDOGNE Posts: 296 |
HI JOE90
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23rd Feb 2013 6:09pm |
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