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Hams930T Hams930T is offline
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Join Date: Jun 2013
Location: Plano, TX
Posts: 792
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I know the deviates from the original wiring; but I decided to bypass the original relay wiring and run dedicated 40amp relays to each of the fuel pumps. I used the output wire from my front pump as my switched +12v signal to the relays so they will operate as intended, not just under key power. By doing this, I am getting a very clean signal to my fuel pumps. I basically purchased the 40amp fuel pump kits from Painless Wiring Products. The wiring is 12awg to the relay and then 12awg out to each pump. I have a 30amp blade fuse inline from the battery to the relay. And like I said, the +12v switched power is the actual power wire from the original front fuel pump - so my original relays are essentially under no load now.

I would consider this mod and likely change your fuel pumps.

Best of luck.

Chris.
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Hams930T
1986 930
2015 991 GT3
2016 Cayman GT4
2012 911 Cup
Old 06-29-2014, 01:42 PM
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