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1994 Cougar XR7 DOHC/5-Speed
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Gets less and less realistic as these cars get more scarce at junkyards but pulling the stereo harness out of a non-premium sound/JBL car you don’t need a bypass and the wires fed to the speakers are normal sized. The wires between the head unit and amplifier in premium sound are the size of the wires in a USB cable
 

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Administrator
1994 Cougar XR7 DOHC/5-Speed
Joined
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21,280 Posts
If you crimp half assedly the wires may pull out or squeeze the tool so tight strands sever. Soldering rules, if you use insulated strink tubing it will be too stiff past the splice to fatigue break after. Plus the real boss way to solder splice wire is to strip the insulation back ~ 1/2" on one and ~1" on the other end and solder them side by side rather than inline into each other, then fold back and there isn't a stress point in the flex. combine that with insulated stink tubing and its bomb proof.

Another life hack, non-insulated shrink tubing and two-part epoxy is a suitable substitute to the insulated type, the epoxy instantly dries inside when you apply heat.
 
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