So this evening I’ve been looking at the under bonnet light - what an amazing little device.
Gravity assisted mercury filled switch that activates the light when the bonnet angle is enough! Wow this needs rescuing
So checked the bulb continuity - ends corroded but cleaned up
Looking at the light unit itself - very corroded/oxidisation and just can’t get continuity end to end. In fact I can barely get continuity on the initial tab 2mm apart.
So needs a clean up…… I’m getting out the Cola
Soaked each end for an hour and it’s much better (I assumed the mercury switch was water tight because of the mercury)
Looks much better now but still struggling with continuity
So I stripped it down further - removing the whole mercury switch from the light unit and then the mercury unit from the switch
Tested the mercury switch and it was working ok.
Lots of cleaning of the metal with contact cleaner, grit paper and a craft knife to get good contact surfaces meant I started getting continuity across more of the light unit
Switch unit first
Then the whole unit
So now I know the light unit works as it should - time to try and work out if there is power to it under the bonnet hahaha
JJ