Recommend contacting Pyramid customer support directly here:
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SOURCE: I have a Pyramid 403G, no wiring diagram
I have the manual for the Pyramid 403G 7 band Graphic Equalizer. The wires To your radio: Green/white left negative Green left positive To your radio: Gray/white right negative Gray right positive Red with fuse to ignition power Black Ground Left Rear speakers: Blue rear left negative Blue/black left positive Left Front speakers: White/black left front positive White left front negative Right Rear speakers: Brown/black right rear positive Brown right rear negative Right Front speaker: Yellow/black right front positive Yellow right front
the wires are marked exactly the opposite of what all know as standard. According to the manual the wires marked with the black are positive, it threw me since I have been wiring for the last 25 years. If you make the mistake of wiring it like you wire everything else it will not have any power and act odd, I made that mistake.
SOURCE: I need a wiring diagram
Click on MANUAL DOWNLOAD
LOOK PAGE 4 INTO THE PDF FILE!!!!
http://www.pyramidcaraudio.com/sku/903G/10-Band-Half-Din-Power-Booster-Graphic-Equalizer-Amplifier-200-Watts#
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