Yamaha Audio question

[MillsyMO]

I’ve read through tons of posts on Yamaha stereo upgrades. I’m very familiar with wiring stereo’s and amplifiers. Does anyone know why this factory amp has this yellow wire? On a stereo it’s there for constant power to keep your memory when the vehicle is off. So why would this amp have it? Is this more than an amp is it the tuner also?? AR250.

 

[MillsyMO]

Here’s photos of what I’m working with.

 

[sunbyrned]

I googled to see if I could find out anything. They have various wiring diagrams to consider. Hers one that shows a yellow going to the battery as well as a yellow going from the amp to the subwoofer. Don’t know if this helps any but maybe you can explore the site and see if it helps.

MP5+, WR5, AD600.5, Elite/PRO Sport/PRO Classic Speakers/Subs Wiring | Aquatic AV Support Center

Marine & ATV DIN Stereo System with 4 Speakers Wiring

help.aquaticav.com

 

[Adrian @ JB Solutions]

My gut would tell me it's the main power wire for the amp. Put your DMM on it, you will figure it out pretty quick.

 

[scokill]

I don't know this unit, but the amp could be a combo unit and the interface is just the interface. The yellow is likely like all yellow wires...constant to keep any settings that reside in the unit. I doubt it's just a dumb amp. Further research indicates it's appears like this one BLUECUBE6 Mini

 

[Adrian @ JB Solutions]

I don't know this unit, but the amp could be a combo unit and the interface is just the interface. The yellow is likely like all yellow wires...constant to keep any settings that reside in the unit. I doubt it's just a dumb amp. Further research indicates it's appears like this one BLUECUBE6 Mini

Based on that - both yellow and red are your +12v.

 

[MillsyMO]

According to my volt meter the red is my remote wire, yellow constant, and blue is dead.