Could really use some help...again..

start at the rear taillights make sure all of the bulb sockets are clean and not corroded and make good contact to the tail light bezel. Same procedure all the way around the exterior, might even get some dielectric grease to help make contact.
Get a woven grounding strap (NAPA) and connect one side to the engine and one side to the car body.
There needs to be a good ground on the instrument cluster as well.

good luck