[dan.klasson]

Replacing an ignition switch with a toggle switch is used primarily for race car applications or early model cars that do not have a computer-controlled engine management system. To modify a computer-controlled vehicle in this manner would require the key to unlock the steering wheel and an electrical nightmare to incorporate the security system, the computers, fuel injection, ignition and a multitude of other systems. The final result would be a thousand times more expensive than replacing the ignition switch and then would have no security at all. more

[OBTC]

This, however, is a preferred modification for race cars. If the car has a locking steering wheel, the key must be used unless the locking mechanism is removed. The battery must be disconnected prior to removing the switch. Remove the ignition switch, leaving the key tumbler intact. Hold the ignition switch away from any metal that can act as a ground and reconnect the battery temporarily. Use a voltmeter and probe back of the switch for battery voltage. Once the terminal is identified, cut the wire and put a piece of tape on it or mark it some way to identify it as the hot wire. Purchase two 30-amp toggle switches, one of which should have a safety cover. This is not necessary, but is a good safety feature. One switch will be an on and off switch for all accessories and engine ignition. The other is for the starter. The covered switch should be used for the starter. Attach the hot wire from the battery to the ignition switch top post. Attach the remainder of the wires, except for the yellow wire, to the opposite terminal of the ignition switch. Attach a separate wire from the battery terminal of the ignition switch to the starter switch. Attach the yellow starter wire to the opposite terminal of the starter switch. Install the switches in a location that is convenient, but where it is unlikely to be accidentally turned off.

[daemox]

To start the vehicle, turn the ignition key on to release the steering wheel and the transmission gear shift lock. Hit the ignition switch to start the engine. If the starter switch is not spring loaded the switch should be shut off as soon as the engine starts or the starter will stay engaged.

[hendi]

here

[worldoffer]

EDIT: Even if your car doesn't have switched outlets, chances are that it has something that is switched on only with the key is in Accessory or Run positions. This is where things become very model-specific. If this is a classic car where the key switch directly controls power to the + side of the ignition coil, connect your new relay coil to that terminal. If it's a newer car, look first for an IGN or ACC relay. In the unlikely event you can't find one, find something that is switched on and off with the key, and tap the power to that device to operate your relay. Be sure to have transient protection (flyback diode or snubber) on your relay coil if you do this. [links]

[lightbox]

Next, identify the 12V outlets on the wiring diagram. Outlets that are on all the time are likely connected to B+ (straight to the battery) via a 15A fuse. Outlets that are on only with the key will be connected to a relay that will be on with the run/ignition (IGN) or accessory (ACC) key positions. It, too, will have a 15A fuse upstream from the outlets.

[neofutur]

The solution ends up being very, very dependent on the exact model of your car and the physical distribution of the outlets within the vehicle. more

[Warz]

You'll need a service manual for your car that has a complete wiring diagram. Check first before you buy one, as many only have block diagrams or step-by-step electrical tests instead of full wiring diagram.

[merrydaily]

Recently, on a business trip, I had a rental car. Now, in my car, all of my 12V power outlets are always on. On the rental car, some of them were always on, some of them were only on when the car was on. Is there a way that I could hack my existing 12V outlets to either have some of them only be active when the car is on, or better, add a simple toggle switch that will toggle them between running always or only when the car is on? more

[thaigamezone]

I'd recommend adding a separate relay and fuse in parallel with your existing IGN/ACC relay, then running dedicated 14-12AWG wire to each DC outlet. You can then install an SPDT toggle to switch between the existing (always on) and new (on with key) 12V supplies, with the center switch terminal connected to the DC outlet. Make sure that you use a switch that is rated for 15ADC or better. [links]

[cliff]

This is doing my head in. It�s no doubt simple, but my brain is just not working.

[jaredreed496]

I�m seeking to have the ability to switch off the camera manually when the car is off (by a momentary push switch) then have the camera automatically turn back on when when the the car is ignition is activated. here

[DrakxQueen3iv]

Essentially:
- car on, camera on.
- car off, camera on. UNLESS,
- car off, momentarily button pushed, camera off. here

[destinbrides]

Chances are, if you’re reading this you don’t need to be reminded that in America a vehicle is stolen every 42 seconds. You already know how common car theft can be, which is why you are probably wanting to get some ideas on anti-theft kill switches and DIY installation kits for your car.

[Bitquux]

While there are many high priced car alarm systems out on the market today, a simple and relatively cheap alternative is to install a hidden car kill switch that disables your car from being started, even if that high priced alarm system is bypassed.

[sevyanfellow]

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