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Avoid star washers for ground connections and especially for battery cable connections. Star washers can allow moisture intrusion to the connections, which exacerbates corrosion. In addition, they decrease the surface area of direct metal contact. Rather, burnish metal at the attachment site until it is bare, clean and shiny. Make sure that ring terminals are properly sized to the bolt used to attach them. Then liberally coat the terminal and attachment point with antioxidant during assembly. Never connect the engine-to-firewall ground strap to a valve cover bolt. Attaching to a valve cover bolt will invite grounding trouble for all cab appliances. Instead, attach the ground strap under a 3/8" bolt at the back of the passenger side cylinder head.Whether you are experiencing electrical problems or refurbishing the vehicle, take an inventory of all of the vehicle grounds and service them appropriately (disassemble and clean connections to shiny bare metal, followed by liberally coating terminals and connections with moisture rejecting antioxidant paste). Upon inspection you should discover the following vehicle grounds; recommended wire sizes are listed for any ground paths that need to be fabricated and installed:battery-to-engine block or alternator bracket (2 gauge) — this is the primary high-current ground path (>150 amperes) for the engine and cab, supporting the full burden of the starter cranking current, charging system current and cabin electrical appliance current. DO NOT attach the battery ground cable to an intake manifold bolt or stud!battery-to-right (passenger side) frame rail (10 gauge) — this ground path is crucial as the primary extension of the main vehicle ground to the rear of the vehiclebattery-to-radiator support (10 gauge) — this is the primary ground path in support of all of the forward running lamps, forward turn signals, headlamps, and horn(s)back of right cylinder head-to-cabin firewall (5/16" braided strap or 8 gauge) — this primary ground path ensures the cabin is adequately grounded in support of all cabin mounted interior and exterior electrical appliancesdash lighting and interior appliances-to-cabin left kick panel sheet metal (various, but typically 18 and 16 gauge) — this shared grounding point, common to nearly all of the electrical appliances inside the cab, interior lighting and instrument panel, is crucial to preventing the occurrence of floating grounds and associated electrical ghosts.rear lamps-to-bed (16 gauge) — ensures the rear lamps are suitably grounded; alternatively, ground the rear lamps directly to the right frame railbed-to-right frame rail (14 gauge) — ensures the bed is suitably grounded in support of the rear lamps and other appliances grounded to the bedcabin firewall-to-engine compartment hood (1/4" braided strap preferred for superior flexibility, otherwise 12 gauge, suitably located with sufficient length to allow opening and closing of the hood without catching, excessive flexing or stretching of the wire) — (optional yet highly recommended) helps manage radio "bzzzzzzz" and provides a stable ground for an optional hood mounted engine compartment lampAdditional primary ground connections are okay. If any of the recommended ground connections are missing, fabricate and install them! If damaged, repair or replace them!Other areas to check are the fusible links and harness connections at the starter and firewall junction block. Loose connections or compromised fusible links can cause "mysterious symptoms."