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Old 10-20-2021, 12:14 AM   #7
VetteVet
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Join Date: Jan 2005
Location: Kalamazoo, Michigan
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Re: Need some HATZIE help! EFI Pump Power?

Quote:
Originally Posted by SunSoaked View Post
VetteVet,

I think you nailed it! That's a great solution. Keeps it simple and reliable. It also allows me to leave the OEM fuel system harness intact and just add the new "sub" harness to control the pumps. I'll just add a SPDT switch next to the factory rocker switch so they can be switched together when I want to switch over (Whew! Sorry about all those switches....lol).

It also retains the prime and safety shutoff feature built into the EFI because it just kills the negative output regardless of the position of the switch.

I drew it out on paper and it makes sense. Thanks for your help!
Well I studied it quite awhile and was gonna find a diagram I could modify to show you but I think you have it handled. Let me know if it works out for you.
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