Updating electrical wiring
An internally regulated GM “SI” or single wire alternator is required.
And while the alternator isn’t supplied, everything else needed comes in the kit, including a heavy gauge alternator feed and fusible link.
In addition, the instrument cluster wiring will plug into the original instruments, as well as most popular aftermarket gauges like Dakota Digital, Classic Instruments, Autometer, VDO, and others.
Anytime electrical work is undertaken the first step is to disconnect the battery.
Factory plugs simplify connecting to factory switches and extra-long wires in the front and rear harnesses make custom routing possible—and there’s nothing intimidating about it.
The rear body harness plugs into the main harness at the left kick panel location.
As the new harness passes through the same holes, the proper size rubber grommets are included to protect the wires.
When crimping terminals don’t use pliers or anything other than a quality tool, like we used (American Autowire offers two sizes of crimpers).With that done Valenzuela and Jason Scudellari, our CLASSIC TRUCKS Tech Center teammates, were ready to install the harness.The kit is broken down into individual bags identified by letters on the instruction sheets visible through the bags—the letters also indicate the order in which each section is installed.Along with updating the electrical system we turned to LMC for a few appearance-enhancing parts.The dashboard was treated to new knobs and chrome bezels with the appropriate markings—on the outside new parking light and taillight lenses were installed. American Autowire’s Classic Update harness combines ease of installation found in a stock replacement harness with the ability of a custom harness to accommodate a high-output alternator and added electrical accessories.
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When installing any portion of the wiring harness it’s vital that the wires be protected from sharp edges or hot surfaces that could cause damage.