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Old 03-17-2005, 01:59 AM
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battery disconnect switch

Just relocated my battery to the trunk and installed a disconnect switch. I'm going to run a cable from the starter to the positive post on the switch and then to the positive terminal on the battery but what do I do with the output wire from the alternator? Thanks.

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Old 03-17-2005, 04:09 AM
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Switch

Doc Here,

The Alternator Wire will also be moved to the Switched side of the circuit, so that it goes open with the rest of the circuit.

What Kind of Car is this?

Is it Computer controlled?

Do you have A CD/Radio Player with Memory presets?

And are you planning to use the switch regularly or for emergency's?

If you are planning to use it regularly and have a computer and CD player, you will want to wire these past the switch to the battery,else they will lose memory every time you shut it off (open the switch).

In the case of the Computer, it may take as much as 10 ignition cycles to reprogram itself, and run like crap in a can during that time. Some will reboot right off, some Average out over time to store the new data.Depends on what you have.

In the case of the CD player, if you like resetting the time, audio levels and stations every time you get in the car, don't sweat it. Otherwise I suggest you wire past the switch.

Food for thought....

Hope it helps!

Doc
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Old 03-17-2005, 08:00 AM
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switch

Any good switch has an extra terminal for the alternator. The switch is a safety device in case of crash. Sparks can cause a fuel fire. Bypassing the switch for stereo, radio, etc defeats its purpose. If the switch is bypassed for any reason it will fail NHRA tech and you will be bounced off the track.
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Old 03-17-2005, 09:17 PM
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The car is a '73 Laguna and it must be legal to race so I'm assuming everything must be shut off with the switch. I'm not sure exactly what to do with the alternator wire...do I splice two wires into it and run them back to the switch? I'm sorry electrics is not my forte.
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Old 03-17-2005, 10:18 PM
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alt wire

If the aternator wire was hooked directly to the battery. You will have to run the wire back to the switch. If it runs off the solenoid leave it be.
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Old 03-17-2005, 10:35 PM
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Thanks, I believe it runs off the solenoid. I guess I'm ok then. I should be able to turn the switch off while the car is running and kill the motor. I was just worried that it would still run even with the battery disconnected.
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Old 03-18-2005, 02:09 PM
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switch

Quote:
Originally Posted by Marcus
The car is a '73 Laguna and it must be legal to race so I'm assuming everything must be shut off with the switch. I'm not sure exactly what to do with the alternator wire...do I splice two wires into it and run them back to the switch? I'm sorry electrics is not my forte.
Doc here,

Sorry, wasn't sure if this was just a daily driver that you wanted to hook up for anti theft or not...a lot of guys do...

For Race indeed, you want everything to go off.

Doc
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