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this is my friends car its a 1995. last night we put in a new thermo and the fan sensor in the head that ecklers sells to turns on the fans early.
now the problem how do you wire it the install sheet sucks.has anyone put in this sensor if yes can you please send pictures. they tell you you to look for the f termianl on the relay we could nut find it . which relay is it. there is 2 gray 1 black.
help please
mitch speednut2@aol.com
You want to splice the ground side of the Relay(s) to the switch. Primary should be dark green (terminal F); secondary dark blue (terminal F). Fan(s) will remain under control of the ECM or the switch.
I don't have a '95 GM Shop manual but my Haynes says that both fan relays are located on the left side of the radiator shroud.
The Primary Fan relay has a Dk Grn/Wht wire comming from terminal F and the Secondary Fan relay has a Dk Blu/Wht wire comming from terminal F.
If you splice the wire from your new fan switch into both of these wires the switch will brind on both fans as will the ECM. So, you may want to just splice the new switch wire into the Primary Fan relay (Dk Blu/Wht wire) so that the new switch only brinds on the Primary Fan. Then the ECM can still control both fans independently.
thanks for the help guy i gave him the info he will work on it tonight.
i will let you guys know how he makes out.
thanks again
mitch speednut2@aol.com
I don't have a '95 GM Shop manual but my Haynes says that both fan relays are located on the left side of the radiator shroud.
The Primary Fan relay has a Dk Grn/Wht wire comming from terminal F and the Secondary Fan relay has a Dk Blu/Wht wire comming from terminal F.
If you splice the wire from your new fan switch into both of these wires the switch will brind on both fans as will the ECM. So, you may want to just splice the new switch wire into the Primary Fan relay (Dk Blu/Wht wire) so that the new switch only brinds on the Primary Fan. Then the ECM can still control both fans independently.
I'm confused on the wiring you wrote about.
You first identified the PRIMARY Fan Relay as having Dk Grn/Wht wire and the SECONDARY Fan Relay has having Dk Blu/Wht wire coming from terminal F, but down further you identified the PRIMARY Fan Relay wire as being Dk Blu/Wht.