1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

POWER SOURCE

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  #1  
Old 08-31-2018, 07:05 PM
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POWER SOURCE

Installing a EFI system that needs a power source that's hot with the key on or in start position. the electrical system has been changed from original. Can't seem to find any circuit that fits the bill!
 
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Old 08-31-2018, 07:10 PM
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Surely there is somewhere on the back if the ignition switch that fits the bill .
 
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Old 08-31-2018, 07:22 PM
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look at the back of your ignition switch and follow the turn to the contact points to find your wires. you need constant hot on and with starter.
 
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Old 09-01-2018, 11:39 AM
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With all due respect, if that is causing you issues please seek help with your install. Those are some expensive parts that you do not want to ruin.
 
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Old 09-01-2018, 02:16 PM
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Tapping ANY existing circuit for an engine management system really isn't a good plan. I would feed your EFI system directly from the battery through a relay. You can use a feed from the ignition "ON" terminal of the relay to close the relay.
 
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