Finally about to start on fitting a boost gauge. Wanted to know what the easiest/neatest place to tap into the instument lighting dimmer circuit would be?

It's a LHD car, the dimmer switch and fusebox are right next to each other (dunno what they're like in a RHD). Would prefer to use the fusebox, if that's possible, as it saves having to pop out the dimmer switch tbh....

Ta muchly for any advice

Bas

Not sure your going to be able to Bas. The vehicle dimmer for the lights is a duty cycled 5 v signal from the central electrics ecu.

Found an answer on page 2 of this pdf: http://www.42draftdesigns.com/installation/WEB_Edition3Volume2.pdf

Handy hint Bas - to remove the light switch, push the switch inwards, and turn to sidelights. It should lock allowing you to pull it straight out.

Thanks for the hint Tom - will fiddle with it and check it all out with a multimeter......

Mine's just wired into a positive wire off the radio - quite a chunky one if I remember right. And the earth is tapped into the metalwork around the fuses. I have my light on all the time now as I now need a permanent live for all the other gauges which are digital.