Having heard about (on Renault & Dacia) and then experienced the dash board display disappearing in the shadow as you drive along in daytime, I decided to mount a led light on the steering cowling to illuminate the speedo. I wanted the led to go out when the “sidelights” were turned on. (an earlier post mentioned the DRL’s)
I decided to wire the led in similarly to the ignition/battery light on vehicles “back in the day”!
This meant I required an ignition live wire and a sidelight live wire. Both exist on the light switch multiplug. Yellow wire is switched by the ignition (poss. an accessory wire) and the Blue wire is switched by the sidelight switch.
By connecting the led live wire to the Yellow wire and the led negative wire to the Blue wire, the led will illuminate when the ignition is on getting its negative (earth) via the Blue wire until the sidelights are switched on. This will give the led two live feeds and the led will not illuminate. (a bulb could be used instead of the led but with this wiring it is likely to come on if the sidelights are left on. i.e. when parked).
The led I used is a motor cycle rear number plate light/mounting bolt. I mounted it off center to try and avoid any direct reflection back at the driver. If you try this yourself; I would suggest avoiding cutting into the vehicle wires by the switch, especially with the reports of dodgy switches. I altered a couple of male spade terminals that push and lock in the rear of the multiplug. (Remember any work you carry out is at your own risk).
The upper cowling comes off if you put the wiper switch all the way down and the push the cowling up with your finger in the area above the wiper switch stalk (no screws). The light switch multiplug has a spring finger that has to be squeezed in as you pull the plug off. I used small screwdriver to squeeze it in.