7727 wiring questions
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Junior Member
Joined: Sep 2005
Posts: 84
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From: locust, NC
7727 wiring questions
I'm doing a 7727 ecm swap to my 3.4 camaro motor powered S10. its up and running save for a few exceptions. cooling fans and AC system.
are the pins for the fan relays coming from the ECM power or ground?
also, pin C21 is labeled as the AC pressure signal.
pin c17 is AC request
pin a12 is ac control
my origonal TBI motor in my s10 only had two connections to the ECM for the AC system.
pin B8, labeled AC signal
pin A2, ac relay control.
what goes to what?
also, can someone tell me what the pinout for stock fuel pump and AC relays from an S10 are? I've got terminals A,B,C, and D.
thanks
Michael
are the pins for the fan relays coming from the ECM power or ground?
also, pin C21 is labeled as the AC pressure signal.
pin c17 is AC request
pin a12 is ac control
my origonal TBI motor in my s10 only had two connections to the ECM for the AC system.
pin B8, labeled AC signal
pin A2, ac relay control.
what goes to what?
also, can someone tell me what the pinout for stock fuel pump and AC relays from an S10 are? I've got terminals A,B,C, and D.
thanks
Michael
Supreme Member
Joined: Oct 2002
Posts: 1,096
Likes: 0
From: Idaho
Re: 7727 wiring questions
Can't help much but I do have a link to much 7727 information including wiring schematics...
http://www.diy-efi.org/gmecm/ecm_info/1227730/
http://www.diy-efi.org/gmecm/ecm_info/1227730/
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