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I'm in the process of installing a MP3 player and a bluetooth handsfree kit in my 2006 F250- I've got the PIE FRD04-AUX box to install the MP3 and the kit to install install the bluetooth for a nice smooth installation- but the display has a 'dim' input- I can't find the wire on the harness that is the 'dim'... any help or pointers would be much appreciated, in particular, which wire into the radio is the dim input.
Radio Ground black and black/lt. green - radio harness
Radio Ignition pink + radio harness
Radio Illumination lt. blue/red (dimmer) + radio harness
Factory Amp Turn-on N/A
Power Antenna N/A
LF Speaker +/- orange/lt. grn - lt. blue/wht +,- radio harness
RF Speaker +/- white/lt. grn - dk. green/org +,- radio harness
LR Speaker +/- gray/lt. blue - tan/yellow +,- radio harness
RR Speaker +/- orange/red - brown/pink +,- radio harness