I am in the process of repairing a GE profile 30" gas cooktop with downdraft, One burner out of the 4 ( each module includes 2 burners) will not light up ( upper left burner). I have switched sides, the burner of the left module works on the right side. After trouble shooting the wiring system i have isolated a faulty ignitor switch. My question is that i don't understand fully the function of the ignitor switch harness assembly ( There 6 total, 2 on the two right knob stems and 4 on the left two knob stems, the left four are stocked 2 and 2 on each stem ). is there a service manual for the GE gas cooktop?