I have an 87 suburban that while it was running and I was doing a pre-trip inspection on it I turned on the turn signal and lost all powe including lights and the sub died. Nothing happens when I turn the key and the dome lights don't even work. I've heard it might the the ignition switch in the column. Would appreciate any other ideas someone might have. This is my baby so I want to get it back to screaming down the road. PS. it's a manual and has less than 70000 miles since it was driven off the lot in 87. Pic.