you have a fuse box under the hood behind the batteryand another located under the dash on the left side of the vehicle access is gained by snapping off the plastic cover. later models also have a...
under hood..drivers side inner fender (apron)..will look like two connectors plug into the fender....it's the two wire plug....pull it and cross it out with a jumper wire to set timing...(about 5...
There is a fuse box located to the left of the clutch pedal on the wall of the truck tucked directly under the dash. You need to be a contortionist to get at the fuses though.
If you have backed out the idle adjustment screw all the way and it still has issues then the system is probably dirty. Get a good carb cleaner and clean out all the ports on the throttle manifold...