 Master Cut-off switch questions., is it this simple? |
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 Nov 29 2004, 03:37 AM
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#1
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Veteran Member  Group: Member Posts: 2,688 Joined: 23-December 03 From: Ft Worth, TX Member No.: 8  |
i need to start the wiring part of my CMC car build. the only factory wiring thats gonna be used is the engine harness.
i guess when wiring a car, the first place to start is the battery and go from there. when wiring in a master cut-off switch, is it as simple a putting it inline w/ the positive battery lead? i think the alternator feed needs to be on the battery side of the disconect switch, right? i also plan to put the PCM BAT lead there also. one thing i keep seeing reference to is something to protect the alternator when this switch is flipped. what needs to be done here? tell me what you know on this please. |
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Nov 29 2004, 04:55 AM
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#2
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Veteran Member Group: Member Posts: 2,688 Joined: 23-December 03 From: Ft Worth, TX Member No.: 8 |
i'm not looking for a quicky fix. hell the car doesnt even have 1 single wire in it! (IMG:http://www.frrax.com/rrforum/style_emoticons/default/blink.gif)
as for disconnecting the battery from a running alt, thats not what would happen if the 12v output from the alt was put on the battery side of the cut-off switch. if it wasnt, the car would still run. the alt will provide enough output to keep a car running. the computer (PCM BAT) will also be on the battery side of the switch, thus having 12v at all times. the PCM IGN feed will however loose 12v when the switch is tripped thus killing the 12v to the opti and coil. i'm mainly looking for feed back on some type of requirement to have a diode in the circuit somewhere to dump the spike. make sence? here is a link to the reference. looks like a resistor is needed. http://www.pegasusautoracing.com/productde....asp?RecID=1464 |
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Posts in this topic
Glenn98ZM6 Master Cut-off switch questions. Nov 29 2004, 03:37 AM
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