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Mustang '65-'68 Wiring System Upgrades

Painless Performance Has a Direct Replacement Upgrade for Early-MustangWiring Harnesses
From the May, 2009 issue of Mustang Monthly
By Jim Smart
Photography by Jim Smart
173 0305 Wire 1A Z
173 0305 Wire 1B Z
This is the Painless Performance... 
   
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173 0305 Wire 1B Z
This is the Painless Performance main wiring loom that goes under thedashboard. Think of this as your Mustang's nerve center. All harnessesplug into the main wiring loom. Included is a modern, high-tech fuse box(with easy-to-replace fuses) that mounts in the same location as thefactory fuse box. The harness plugs into all of your Mustang's switchesto completely replace your Mustang's original wiring system.
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These weatherproof connectors... 
   
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173 0305 Wire 2 Z
These weatherproof connectors keep out moisture and corrosion. Sincethey're sealed tightly when connected, there is little chance of an opencircuit. These connectors are easy to connect and easy to disconnect.What's more, a clean connection eliminates any chance of high resistanceto the flow of electricity. High resistance creates heat--and fire.
173 0305 Wire 3A Z
This type of plug penetrates... 
   
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173 0305 Wire 3A Z
This type of plug penetrates the firewall where the Mustang's factorybulkhead connectors reside. Again, this plug is weather-tight and safe.The opening in the firewall must be carefully cut to the dimensions ofthe template included in the kit.
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Like your Mustang's factory... 
   
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173 0305 Wire 4 Z
Like your Mustang's factory wiring, the Painless system disconnects atkey locations, like the firewall. The main wiring loom under the dashhas a female multiplex connector at the firewall. This is where thefirewall-to-headlight loom connects. The firewall-to-headlamp loomhandles all underhood power. It ties into the voltage regulator,headlamps and parking lamps, horns, starter solenoid, andalternator/generator.
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This is the system's main... 
   
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173 0305 Wire 5 Z
This is the system's main power feed from the battery to the main wiringloom under the dashboard. Power begins at the red 10-gauge lead, passingthrough the Maxi-Fuse terminal, then entering the electrical system,just like the factory lead. This harness connects to the main wiringloom at a firewall bulkhead connector behind the engine.

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