I have a 91 Loyale 4wd and was poking around the hood and found two conectors unpluged on the driver side toward the back of the engine compartment. When I pluged the green on up, it would make the fuel pump turn off and on while the car wasn't running, but the key in the on position. The other just made the check engine light flash on and off. Why are these here? Is the one that turns the fuel pump cut on and off there to check the fuel system? I'm just real curious as to why these are here.

Over the Main Brake Pump? ... I think you´re Writin´ About the Computer Control System... (ECU) ...The one that Lies under the Steerin´ Column... (Yes, the one with Flashin´ Red Light - Those are Codes for Diagnose) ...Those Connectors are for System Check...

 

I Suggest you to Don´t Play with ´em...

 

Also, to be Sure about ´em, you can Post a Pic about.

Those unplugged connectors are for checking and clearing your codes on your ECU

Thats what I was thinking.

Thanks