cant find a wireing diagram where i can see well . I have 86 t . in the glove box box is a switch that goes to to ecm . I dont know what is dose. when i flip the switch the engine light comes on . I have traced it to the ecm one side goes to a yellow wire. the other side goes to a yellow with a black stripe both are in the blue plug .ANY HELP WOULD BE GREAT THANKS CK
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