Not on my Land Cruiser, but I have a mother and child light unit in our front room which has a lot of use but as it has a 300w halogen lamp it uses a lot of electricity so when I spotted on eBay a 230v 80 LED panel I thought that would be much more economical

but as the light unit had dimmers and they don't work with LED's

so when it arrived I temporarily connected the panel straight to a 13a socket, and bought a couple of 230v toggle switches to replace the double dimmer.
Right, as I am a qualfied electrician I would have no problem in converting it, yeah right

so today got to work rewiring, so live feed to connector block, check,

looped to switches, check,

neutral to connector block and to each lamp, check.

switch wire to each switch, check,

So switch on . . . . nothing

Now it had been working perfectly well when plugged direct so checked all connections (about six times) all OK

with all the double checking this had taken me most of the afternoon, finally checked the wires into the LED panel and found one loose, at last problem solved . . . . . . . . . . . nah!

as a last possible option I checked the fuse in the 13a plug, yeah! you guessed it, it was blown