ECU cooling fan signal
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Junior Member
Joined: Nov 2019
Posts: 9
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From: South Africa
Car: 1985 Z28 Camaro IROC-Z
Engine: 5.0 305 TPI
Transmission: 700R4
ECU cooling fan signal
Hi guys, i accidently ran +12v switch power to the green wire with tracer from the ECU. is the signal wire a negative signal? if so would it have blown something inside the ECU? Car starts and runs fine, gauge works fine but now just after 220deg im not getting any voltage from that green wire with white tracer from the ECU. what is the chance that something small blew and i can repair it myself?
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: ECU cooling fan signal
It would be helpful to know which ECM this is. As for the ECM controlling the fan relay, it provides a ground to activate the relay. So connecting +12 volts to it can fry the driver if it was trying to turn on the fan relay.
RBob.
RBob.
Joined: Dec 2004
Posts: 16,888
Likes: 1,013
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: ECU cooling fan signal
Looking at his other posts I think it’s a 1226870 85 tpi ecm.
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