Headlights not working

On this vehicle, the power flows from the "TBC" fuse to the headlight switch. The headlight switch provides power to the headlight relay control coil. When you switch headlights on the control coil in the relay energizes and moves the contacts closed. Power then flows through the contacts and to the headlights. From there, the ground circuit goes through a junction block on the left side of the engine compartment (look for a yellow wire for the low beam ground). From the junction block, ground goes back to dimmer section of the headlight switch (again on a yellow wire). From the dimmer section, ground goes to splice 203 on the left side of the dash before terminating at ground #202. Check for ground at all those locations. Somewhere in that ground circuit you've got an intermittent open