C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

question - 85 corvette - ground distribution point S111

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Old Feb 22, 2016 | 08:57 AM
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Default question - 85 corvette - ground distribution point S111

where is it? i'm trouble shooting an issue with my 85 - not getting the 2 second signal from the ECM to the fuel pump relay. the relay grounds at G103 located at the thermostat housing. there is not a problem with the fuel pump - car runs fine. what i'm looking for is the location of S111. I've been through the FSM, and cannot find anything on it's location. either it's not there, or i'm over-looking it. any help? TIA...
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Old Feb 22, 2016 | 10:39 AM
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Originally Posted by Joe C
where is it? i'm trouble shooting an issue with my 85 - not getting the 2 second signal from the ECM to the fuel pump relay. the relay grounds at G103 located at the thermostat housing. there is not a problem with the fuel pump - car runs fine. what i'm looking for is the location of S111. I've been through the FSM, and cannot find anything on it's location. either it's not there, or i'm over-looking it. any help? TIA...

I believe to actually put your hands on it you would need to follow the BLK/WHT from most any under-hood component to the harness right rear of plenum. It's mentioned to be there, I doubt any reason for doubt BUT remember '85 is a single year build.

There's 2 BLK/WHT from the ECM, a single from the Burn Off Module and one from the Fuel Pump Relay on all. I'd think it closer to the 2 from the ECM just outside the under-hood pass through.

S111 is in an image 197-1 - I believe and I saw mentioned also S111 location rear of engine CCC harness.

Good luck!

*** For testing just create your own ground to the same destination as the FSM indicates?

Last edited by WVZR-1; Feb 22, 2016 at 01:11 PM.
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