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  How to wire on/off power switch in trunk?

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Author Topic:   How to wire on/off power switch in trunk?

Posts: 357
From: Toronto,Ontario,Canada
Registered: Aug 2000

posted 03-22-2001 09:39 AM     Click Here to See the Profile for 70coupe     Edit/Delete Message   Reply w/Quote
I race my car quite often in the summer and I talked to one of the tech's at the track today, he saidif the battery is in the trunk then you need a shut off switch. No problem I said, he replied that many people put the switches in incorrectly. If you have an alternator, which I do, then the alternator must cut out when the switch is activated. How do you go about doing this? I always thought if the rpm was below 1000 (idle) the alternator wouldn't keep the motor running without some help from the battery?

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Posts: 42
From: LakeStevens, Wa. USA
Registered: Oct 2000

posted 03-22-2001 10:05 AM     Click Here to See the Profile for 68fb     Edit/Delete Message   Reply w/Quote
No problem. From the positive battery post to the cut-off switch. From the cut-off switch to the starter solenoid,(the cut-off switch is put in series with the battery and solenoid). The alternator is fed from the solenoid through the key switch.
You might want to consider an Interstate "optima" battery as they are sealed and vent very, very little...unless you have a vent system and spillage tray already installed.

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Posts: 19704
From: Lyons, IL, USA
Registered: May 99

posted 03-22-2001 09:04 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Motorcraft BX-31 industrial battery. 990 CCA and sealed.

Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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