cheese30 Posted March 18, 2014 Share Posted March 18, 2014 Hi All I have just opened the bonnet on my 2007 focus estate 1.8 tdci and now the warning light on the dash won't go off it just says "bonnet open" the Bonney closes fine and you can hear it lock, I have tried WD40 in the switch but still stays on. Any suggestions welcome Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted March 18, 2014 Share Posted March 18, 2014 WD40 on a switch is a bad idea, it can damage the switch and cause you more issues than anything else! I suspect you will need to replace the switch itself if its still not working. Quote Link to comment Share on other sites More sharing options...
cheese30 Posted March 18, 2014 Author Share Posted March 18, 2014 Thanks for your reply il grab one off eBay Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted March 19, 2014 Share Posted March 19, 2014 Just thinking about it, you will likely need a full assembly, as the switch I believe is integrated into this. Quote Link to comment Share on other sites More sharing options...
cheese30 Posted March 19, 2014 Author Share Posted March 19, 2014 Just had a look at it and think I'm going to have a go at taking that unit apart and recon it see if that does the job Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted March 19, 2014 Share Posted March 19, 2014 worth a shot! Quote Link to comment Share on other sites More sharing options...
cheese30 Posted March 20, 2014 Author Share Posted March 20, 2014 Well took the locking unit apart cleaned it out the re-greased it and now it's working again can't see what I really done but it works so no complaints Thanks for your replys Sent from my iPhone using Ford OC Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted March 20, 2014 Share Posted March 20, 2014 Good Result Bob! Quote Link to comment Share on other sites More sharing options...
fladavid Posted February 3, 2016 Share Posted February 3, 2016 I have the same issue and can confirm, unfortunately, that my problem only started when I thought I'd do the lock and sensor a "good turn" and lubricate it thoroughly with WD40! I have since sprayed it again with electrical contact cleaner and thoroughly cleaned the bullet switch but the light is still on. Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted February 3, 2016 Share Posted February 3, 2016 The wd40 may have caused more harm than good to the microswitch Sent from my GT-I9195 using Tapatalk Quote Link to comment Share on other sites More sharing options...
fladavid Posted April 29, 2016 Share Posted April 29, 2016 After a while the switch has righted itself and the bonnet warning light is now out again. I will NOT be lubricating it with WD40 EVER again! Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted May 9, 2016 Share Posted May 9, 2016 good choice. go get yourself some electrical contact cleaner for any and all electrical connections... Quote Link to comment Share on other sites More sharing options...
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