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2023 Chevrolet Colorado Trail Boss
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<blockquote data-quote="AnthonyO" data-source="post: 8877969" data-attributes="member: 563887"><p>Did some further testing. Loopback harness does work. This headunit is a Smart3 headunit. Meaning, it has to see an ohm load on all four speakers in order for sound to come out. Thats why I am getting pulsing when the amp is hooked up. I looped all four speaker outputs and inputs back together on the harness and voila, sound. Disconnect one speaker and all four shut off. Luckily, I bought the 200.4 which has a 60ohm load resister built in.</p></blockquote><p></p>
[QUOTE="AnthonyO, post: 8877969, member: 563887"] Did some further testing. Loopback harness does work. This headunit is a Smart3 headunit. Meaning, it has to see an ohm load on all four speakers in order for sound to come out. Thats why I am getting pulsing when the amp is hooked up. I looped all four speaker outputs and inputs back together on the harness and voila, sound. Disconnect one speaker and all four shut off. Luckily, I bought the 200.4 which has a 60ohm load resister built in. [/QUOTE]
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