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1999 Fuel Pump Relay Remote Wire

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Old May 15, 2023 | 05:51 AM
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Default 1999 Fuel Pump Relay Remote Wire

Hello friends. I am in the process of installing a killswitch to the Fuel Pump for theft prevention (but mostly for fun lol). I am having a heck of a time trying to figure out which wire I need to tap into, and I'm hoping either someone knows where to look or can direct me to a wiring diagram or something. All I know at this point is that the PCM is sending 12v to relay 35 to activate it, but once I get the engine fusebox apart, the lower section (middle bank) has 9 different 12v sources when the key is switched to ON. Which of these sources is the one I need? Am I even looking in the right bank? Am I going about finding this wire the correct way? Or even putting this switch on the right wire in the first place?

That probably wasn't enough info, but hopefully someone can help me expound whatever further details are necessary. Hoping to get this sorted soon- the weather's getting nice and the roads are calling!

Thanks all!
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Old May 15, 2023 | 07:38 AM
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Old May 15, 2023 | 12:25 PM
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Thanks for the quick response! I'm not very experienced in wiring diagrams, but if I'm seeing this correctly, the wire I'm after (Fuel Pump Relay Remote coming from PCM) should be the DK GRN/WHT E12 wire.

Is that correct?
Is there a way to see which of the 3 large plugs in the lower engine bay fusebox (I called them banks earlier) this wire is coming from?

Thank you so much for your help!
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Old May 15, 2023 | 12:50 PM
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The dark green/white is the relay control side feed…the underhood fusebox connector is C1 and the pin is E12….a pin at the end of the connector and are lettered A-F…I’d be more concerned if you have a Honda Civic getting that stolen than a C5 Corvette.
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Old May 15, 2023 | 12:59 PM
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Originally Posted by C5 Diag
The dark green/white is the relay control side feed…the underhood fusebox connector is C1 and the pin is E12….a pin at the end of the connector and are lettered A-F…I’d be more concerned if you have a Honda Civic getting that stolen than a C5 Corvette.
That should be exactly what I need! I will update once I'm able to get back to the garage.

Where did you find this diagram? Is there a C5 mechanic's handbook I could pick up?
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Old May 15, 2023 | 01:05 PM
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You can buy the 3 volume FSM or get a subscription to Alldata DIY for a month, year, or 3 years.
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Old May 16, 2023 | 03:50 AM
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That wire you pointed out did the trick! Turns out I was poking around in the wrong connector. Figures lol.

Thank you so so much for your help! Would have been a nightmare without some guidance.

Do you have a link to where I could buy a service manual so I don't make such silly mistakes in the future?
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