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03-19-2015 #1
Fans run constantly Ls3 with Psi harness and ecu.......
Ls3 running a Psi harness and ecm, and the output to each fan (almost immediately after the car starts) supplies negative regardless of engine temp. The odd thing is, when a Power Probe is connected to the fan trigger wires from the ecm, it's not a consistent negative output, but broken up....kind of like -----.-..-..-...-------.-.--. It is enough to energize the relay and run the fans. I need to button it up and move the car. This is the second ecu from them and the issue is still present. Any help would be greatly appreciated.
1971 Firebird
2017 Slipstream SS
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03-19-2015 #2