Quote:
Originally Posted by BlueFireIce
Yes, checked harness for continuity, everything is fine. Checked speaker locations with a battery to make sure the diagram I had was right, it was.
The red and blue/white would be hooked up to the 10th pin (Constant Power) and 9th pin (Switched Power) on the harness.
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Since we can now rule out any connection issue you may be experiencing an impedance issue. The easy fix is to use a High to Low level converter. Disconnect the High Level connections of the FAST-9999 and plug the RCA's of the BTAH into the converter installed.
If you are looking to purchase a aftermarket headunit you can skip this all together and connect the Tube using the Low Level outputs of the headunit.