R = Radar Detector
B = Battery, or 12v source (tap into the cd-player, or somthingbehind the dash or off the wiring harness, test with a voltmeter for 12v source, and that is has 12v when the key in the ignition is in the "on" position, preferrably, to eliminate the "double start" when the rd turns off and on 2 times when turning the car on, tap into a 12v source that only is on when the car is in the "on" position. Just poke at wires till you find a good one, turning your key to check that it is only on with the key in the "on" position)
S = Switch, the one I made the schematic for is for a switch that has an LED in the switch, which most switches dont. So the - on the switch might not apply, but all you do is ground it if your switch has one. Just wire it to a metal screw that is screwed in metal and its done.
F = Inline fuse, rated at whatever the RD asks for. It is important because it protects the RD from amps/volts/current that is too high. Most seem to be 10 amp fuses.
Y = Wire that does not come with the direct wire kit, you must supply this wire.
Z = Wire that does come with the direct wire kit, and they usually have fuses built in.
+ = 12V source, you can verify it with a voltmeter.
- = Negative, you must ground this. Make sure you make it contact with metal on the car
the 3 line thing at the end of the wires = grounding to metal on the body of the car or to a grounded wire in the car
Without a switch, you just follow the wiring tips, but you wire the + wire for the detector connected to Z to the 12v source, and the - wire to a ground on your car, or wire.
Philips in most cases, and anything else that is needed to get behind your dash.
Extra wire that is equal guage (size) as your rd kits wire, or slightly larger. Please make sure to buy wire that has a sleeve, not exposed wire.
male/female connectors, that use butt connectors onto a male/female stlye rectangle end.
Switch (optional) you can get this for cheap at rat shack, when you get your wire strippers, wire, connectors, and voltmeter
* Most important thing, always wire the ground first, before the 12v wire, that way if you mess up, you dont lose your rd or anything else. With that, and a few trial and error your rd will be runn'in!
This is as simple as I can make it, without trying to confuse people that are new to wiring. It shows/tells most important things, the double start problem (without putting a delayed-start switch in) can sombody sticky this maybe? feel free to add tips/hints as everyones setup is going to be slightly different. If you have any questions, I can try to answer them, just PM me. Sorry for the poor diagram,it was hand done in paint (lol) I dont have the program I used in school anymore.
If someone could add how to make your own RD wire that would help, as it seems alot of people opt to do it this way.