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Old 01-15-2009, 12:02 PM
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making an ignition switch

hey hows it going everyone i was wondering if anyone has built an ignition switch out of a switch and a push button, becouse my ignition switch is shot
and the car is a drag car so i have no interest in spending the time and money atleast not right at the moment to buy a new steering column
how i was thinking of doing this is to connect the to starter wires together and wire it to one end of a push button and the other end to power and hook both the running wires to one end of a switch and the power to the other really what im wondering is can both starting wires be touching at all times when not connected to power? or if there is anyother ways of doing this? THANKS!

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Old 01-15-2009, 01:08 PM
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The best way to do this would be using two relays. Use one relay to energize the ignition and then use the other relay to energize the starter. Use a maintained contact toggle switch for the ignition relay and use a momentary contact push button for the starter relay. You also should employ some sort of "dead man" switch to kill the ignition relay in the event of a crash or other dilemma.

Vince
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Old 01-15-2009, 04:26 PM
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On our bracket racer we use a toggle switch to close a 40a Bosch relay that powers up a small six circuit terminal block.
All of the normal "run" circuits are on that six circuit terminal block.


Then we use a pushbutton to momentarily close the contacts on a separate Bosch relay to power up the starter solenoid.

This way we can still use the push button when tuning as well.
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Old 01-15-2009, 06:30 PM
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y not just get a new switch for the column?
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Old 01-15-2009, 10:53 PM
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Don't forget to tie in your neutral safety switch. You don't need to use a relay to trigger a starter solenoid.

Last edited by 406 bug; 01-15-2009 at 11:32 PM.
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Old 01-16-2009, 05:59 AM
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Go to post # 7 of this thread:

Mini starter hookup- hook what to where!?

The third image has a wiring diagram for the starter push button.

In addition to this, you will need a toggle switch feeding power to your ballast resistor (if so equipped) or directly to your ignition system (assuming it does not require a resistor).

This all assumes you are talking about a GM product.
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Old 01-17-2009, 08:29 AM
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All the other comments are correct, but I think I can make the answer a little simpler for you (which is what I think you want).

-- 1. You need one SPST toggle to provide ignition-on power to the coil and any other lights or accessories you need (maybe not much in a drag racer). If you can find the existing column wires you can tap in there. If you can't find the right wire, you can use a separate fused power wire (using a relay, if you have high power draw) to provide power. The ignition on circuit must be able to handle all the ignition on load (fuel pump, etc.), and using relays will let you use a relatively small wire to the switch and larger wiring under the hood.

-- 2. You need a push button or spring loaded toggle for a start switch. When pushed down this provides 12 volts to the starter solenoid terminal to activate the starter. It does not need to handle that much power, but I'd still use a 10-12 gauge wire.

To start
Turn on switch 1 - All powered items should then turn on, and you have power to the coil, fuel pump, etc.
Push switch 2 down to activate the starter and start the car

Bruce
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Old 01-17-2009, 12:33 PM
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Well stated Bruce.
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