wiring harness 94 s10 | eBay Find great deals on eBay for wiring harness 94 s10. Shop with confidence. 1994 Chevy S-10 Blazer OE Wiring Harnesses & Stereo Chevy S-10 Blazer 1994, Aftermarket Radio Wiring Harness by Metra®, with OEM Plug. For aftermarket stereo. Metra preassembled wiring harnesses can make your car stereo installation seamless, or at least a lot simpler.