Join Date: May 2004
Location: Morganville, NJ
Thanked 21 Times in 17 Posts
If you're talking about the left multiplex control unit, it's in the back of the left fuse panel.
If you have an aftermarket radio, immediately remove any wires going to the illumination circuit of the CAR. These are NOT battery power and ground wires, they are bus communication lines to the factory radio's back lighting. By plugging those lines into the aftermarket radio, it blows out the multiplex box, and you lose all gauge back lighting.
I've probably seen more than a dozen gen 6 Accords with blown left side multiplex units, from improperly installed aftermarket radios. And nearly all were installed by stereo shops.
Sapphire blue '04 V6 6 speed w/ full HFP, comptech ss, momo shadow, TL-S 27.2h/20 bars, intake spacer, retro chrome MH1 HIR2 highs, hella DE fogs, EBC Ultimax, subwoofer/amp, infinity rears, HD Radio, aux adapter, navi conversion.
Vermilion 1999 SVT F150 Lightning, Sylvania/Visteon Xenarc HID headlamps, '01 L turn/marker lamps, PIAA fogs, '01 up Bilstein shocks, all Pioneer speakers, Clarion subwoofer. All Redline fluids.
Silverstone 2003 Honda S2000, bone stock