I just installed a new head unit and spliced to take power from an existing circuit (used the 12v cig lighter outlet circuit). When I turn on the unit it barely spins the CD and on tuner it makes no sound. The backlight also dims on certain functions. Am I just underpowered? I have the option to run a dedicated new circuit straight from the battery with an in-line fuse. Should I do that?
Sounds like you're under powered. Go to walmart and grab the correct wiring harness for your vehicle and wire it in the right way, or you're likely to fry your new head unit. I ran a digital amp under powered and it was toast within the first 24 hours.
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