Advice please

Hello everyone.

Im currently in the process of installing additional gauges in a 300TDI (Voltmeter; Oil Pressure; Boost). Apologies about the rudimentary nature of some of these questions, but electics is not a strong point of mine!

1: Instrument lighting
Can I take multiple feeds from 1 of the existing instrument lighting wires? (e.g. the cigarette lighter) or do i have to install a separate wire for each new interment and if so where do they go to?

2: Ignition
Likewise can i take multiple feeds (i.e. 3 separate wires to each of the new instruments but all connected into the existing ignition wire that serves the radio)

3: Earth
I assume its ok to earth all 3 new instruments to the same earth?

4: Positive/live
likewise can the instruments (those that require a live feed) all be tied into a single existing live feed

Again - apologies that this may be very simplistic - i can't for the life of me remember my O Level Physics on electricity!!!

Many thanks in anticipation
Gary

Yes the bulbs won't use much draw,I would take em of the original dash light feed , then your know where you are if it don't illuminate in the future at least you could look at the others and more or less know the feed is still there.

here is a very good tutorial that will refresh the mind!
http://www.landyzone.co.uk/lz/f38/tutorial-car-electrics-245168.html


you can take one feed from any instrument light and run that to all three in parallel , the current should be no problem.

Many thanks for this - much appreciated
G