Big-tom Posted April 8, 2014 Share Posted April 8, 2014 Hello I wonder if anyone could help me I recently brought a 57 plate ford focus st the car is perfect :) but just one thing is really bugging me when driving along at night the radio seems to go bright then dims it self?? Also the dash dim switch doesn't seem to work. Anyone know what this could be?? Many thanks tom Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
Stoney871 Posted April 8, 2014 Share Posted April 8, 2014 Sounds like a dodgy rheostat in the light switch. May need a replacement switch. I'm assuming front fog lights and self levelling system? If so then this one will fit- http://www.ebay.co.uk/itm/GENUINE-FOCUS-HEADLAMP-HEADLIGHT-FOG-LIGHT-SWITCH-4M5T-13A024-HA-2003-2008-/160921824759?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2577b02df7 Quote Link to comment Share on other sites More sharing options...
Big-tom Posted April 8, 2014 Author Share Posted April 8, 2014 Hello thanks for your reply that is the switch :) so that is most probably the fault then? Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
Stoney871 Posted April 8, 2014 Share Posted April 8, 2014 The dimmer switch is just a variable resistor (rheostat) that reduces or increases the voltage through the various illumination circuits, as in your case the radio and dash. The switch could be dismantled to try a repair, but why fiddle around opening a unit and poking around scratching your head when a replacement is so much easier and probably much quicker. If you need help with swapping around a switch I do have a guide from where I swapped out a non-dimming switch for a dimming version. http://www.fordownersclub.com/forums/topic/32195-fitting-a-dimmer-switch-to-a-mk225-focus/ Quote Link to comment Share on other sites More sharing options...
ferretfloozy Posted April 9, 2014 Share Posted April 9, 2014 make sure you get the right part number ..earlier ones are green illumination ..mines a 2007 model and i have red illluminations Quote Link to comment Share on other sites More sharing options...
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