Aerpro APP0259 20 Pin Iso Harness Toyota/Lexus
- Toyota and Lexus cars ( after 2005) with OEM amplifiers to to a aftermarket car radio using phono line output from the radio.
- Blue/ white is for cars with positive AMP turn on ( Most common)
- White/ Black is for cars with negative AMP turn on
- Black /white is and earth drain for the negative side of the Phono plugs (only needed if there is interference)