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Senior Charter Member
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807 Posts
Discussion Starter #1 (Edited)
So I just changed out the Factory five fan to a flex a Lite 3000 cfm fan, Shortly after starting to drive I smelled something new, not wires burning but pungent, thinking that well maybe it’s paint, well the temp kept going north up to 230 before I got to stop. Coolant boiled over but I hopefully didn’t blow a head gasket , got it home and the fan works if I run it to the battery.
Looked at the fusebox and saw this.
What could’ve happened? If I had reversed the wires on the fan wouldn’t the fuse just blow? I checked the Ron Francis diagrams an Black is ground and blue is positive, that’s how I wired the new fan. Any ideas?
 

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Pro FFR Builder and Moderator
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14,598 Posts
Need to add a 30 amp relay and 30 amp breaker to the circuit.
 

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Senior Charter Member
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807 Posts
Discussion Starter #3
Thanks Gordon, the specs on the new fan say 18.5 amp draw, so how much different is that from the factory five supplied fan ? Factory five says theirs draws 19 amps and pulls 2170 cfm. Like I said everything was working before the swap and nothing else changed.
 

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Pro FFR Builder and Moderator
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14,598 Posts
We always add additional relays just for the fans. The standard RF harness does not have enough redundancy.
 

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Senior Charter Member
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807 Posts
Discussion Starter #5
Upon further review, I’m the fool who possibly caused it to fry! I crossed up the plug wires at the fan! Why it just didn’t run backwards is an interesting question. I’m not as perfect as I thought.😂
 
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