autometers

if you hook them up to the battery they will be on all the time. find a wire the is hot when you turn the ignition on, by the fuse box. put a in line fuse and tap into the wire. you will have juice going to the guages when the ignition is turned on and the car is running.

what size fuse should i use sorry im not to good when it comes to electrical stuff

are all the guages electrical, not manual? then i would use a 10 amp fuse. did you receive instructions with the guages you bought? the voltmeter should be put on a line by itself,
dont worry about not knowing about electrical things , we are here to help you. let me know and i can draw up a diagram for you.
mike

Yes all the gauges are electrical they dont tell me where to hook up the 12v source or the wires that go to the lights on the gauge there is a white and black wire for the lights. im guessing white needs to go to the dimmer switch with an in line fuse connected between and the black goes to ground but can all 3 wires go in the dimmer switch with out causing any problems. Now for the other wires where can i hook them up to a 12v source

the three wires for the gauges {not the on ones for the lights can be hooked up to a hot wire by the fuse box. hook them up before the fuse box. what i mean by that is check to see which side the juice is comming into the fuse box, not going out. the way to check it is take a fuse out and check both sides with a test light. the reason for this is that you do not want to overload a fuse that runs something else.

ps. I am not good at drawing let me know how you make out or need any other information mike