In reference to the How to https://www.3geez.com/forum/how/10155...ur-accord.html
4 common places for kill switches are : Battery, fuel pump, i starter and ignition.
1. Battery kill switch - typically seen on track cars, cuts all supplying voltage to the vehicle. Switches are robust and heavy duty. Schematic attached shoes this circled in red.
2. Fuel Pump - One of the most common points to install a kill switch on an electrical fuel pump system. Easy being it can be well hidden and low voltage.
3. Starter - Another very common point seen in older carb'd vehicles, or vehicles with mechanical fuel pumps. Severing power supplied to the motor , inductor side of the starter solenoid, or connection leading to ground will work. Various suggested points are circled in orange.
4. Ignition - Common kill switch design even seen on IC engines. Highly common and highly suggested practice is to sever power to the primary low voltage side of the ignition coil though the positive or negative side terminals. To keep things simple, cutting power to the primary prevents the secondary side from generating high voltage. It is HIGHLY advisable NOT TO install a switch on the secondary side. Leaving the secondary side open circuited can cause high voltage buildup inside the coil and can cause the coil to self destruct. Shorting the secondary side provides a low resistance pathway to ground, giving a good potential to have feedback to the primary circuit. This can cause electrical and / or fire hazards. Suggested kill switch placement is circled in yellow.
Also relay's can be very useful for "circuit protection"
Thank you Dave Lawrence, gp02a0083 on 3geez, for the how-to.
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