I need advice on safely wiring dual electric radiator fans on a 1969 Camaro with a ZZ454 and FiTech Go EFI 4.
The radiator failed on June 3. When removing it, I found melted/fused wiring where a 10-gauge fan wire had been connected to what appears to be a 12-gauge wire. The car has dual electric fans. I was told I should use two separate relays, one for each fan, instead of one shared relay setup.
The complication is that the batteries are mounted in the trunk — actually two batteries — and replacing the existing feed wire from the trunk to the front would require tearing up the interior, carpet, and seats. I believe the existing long power feed may only be 12-gauge, but I am not completely sure.
My questions are:
What is the safest way to wire two electric fans using two separate relays?
Can the existing 12-gauge wire be used only as a trigger or low-current wire rather than carrying full fan current?
Where should the relays, fuses, and circuit breakers be located with trunk-mounted batteries?
Since the FiTech fan wire is a ground trigger, what are the correct relay terminal connections?
Is there a safe workaround that avoids replacing the full battery-to-front wire?
I am trying to prevent another overheated or melted connection, not just make the fans run.
One caution: CRG is excellent for first-gen Camaro knowledge, but because your setup includes FiTech, dual aftermarket electric fans, and trunk batteries, also post the same question on Pro-Touring.com if CRG responses are slow or too factory-original focused.
"need advice on safely wiring dual electric radi
Get your 12 volt + from the starter lug. You don't need to run another wire from the batteries as you already have the + battery cable. You need 2 relays. The Fitech unit can trigger both. I'm a Fitech dealer/installer. Call Fitech. Good tech support.