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Mustang '65-'68 Wiring System Upgrades



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The instrument panel gets its own wiring harness that consists ofinstrument lamps, gauge power leads, and turn-signal lamp connectors.
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Painless makes this job easy, with something for everyone. If you have aFalcon-style instrument panel (standard for 1965), there is a singleturn-signal lamp (center) and a charging-system lamp (right). If youhave the five-dial instrument panel ('65 Interior Decor and GT Equipmentgroups, and all '66s), there is a dual-lamp harness for left and rightturn signals. Believe it or not, it's impossible to connect any of itincorrectly.
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Those with '641/2 Mustangs will relate to this horn relay. When youpress the horn ring, power flows through this relay two ways. Power fromthe horn switch energizes the electromagnet inside, which brings thecontacts together, carrying power from the battery to the horns. Therelay (also called a solenoid) carries the heavy electrical load insteadof the horn switch.
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Painless doesn't leave you out in the cold. This kit is equipped withplenty of connectors and zip ties to cover the installation. However, wecannot guarantee enough connectors if you ruin a few along the way.
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To do this job correctly, you need the tools of the trade. Use a wirestripper and crimpers for best results. Keep plenty of the right sizebutt connectors and eyelets on hand just in case you squeeze too tightlyand ruin a few of them.
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When you join connectors with wires, squeeze the crimper just hardenough to secure the wire. Make sure no copper wire shows outside of theconnector. Ideally, you will solder these connections.
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Painless Performance provides easy to read and understand instructions,including diagrams that make installation a snap. This is the headlightswitch illustration. You can use the connectors provided by Painless, oryou can use your Mustang's original gang plug.

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