What sort of neons are you looking at and where do you want to put them? Alot of them just plug into your cigerette lighter, easy to install but messy wiring everywhere.
If you get hard wired ones buy a two way switch (one that has only on and off) a standard relay and an inline fuse holder.
- Run a wire from your accesories power (eg cigerette lighter power wire) to the switch (mount the switch wherever you want it) then run a wire from the other terminal on the switch to terminal 86 on the relay.
- Run an earth to terminal 85 on the relay.
- Run a wire from the + terminal on the battery to terminal 30 on the relay, also put the inline fuse on this wire close to the battery.
- Then run a wire from terminal 87 to all your neons, earth your neons to the closest earth point.

dodgy wiring diargram
The size of the inline fuse depends on how many neons your running and how many amps all the neons will be using, it will probably end up being SFA tho
Wiring up the way I have just described will mean the neons will only turn on with the key in the ignition in the accessories position. If you want them to come on without the key in the ignition run a constant + supply to the switch (either from the battery or the constant + supply to the radio).
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Ed
Phat Drift Damaged Cobalt Blue 1994 EF XR8 5 spd
Fully optioned - Sunroof, cruise, body kit
Stock as a Rock for the moment
TQE's