Navigation tower light comes on and flickers when the bass hits.

[hawaiianstyln]

*Note- This is not a dimming light issue when the bass hits, I understand why that happens.

noticed a new one last night with the motor not running, the tower navigation white light actually comes on (it wasn't even turned on) and flickers when the bass hits.  We were at a dock tied up so I didn't need my lights on, but noticed when the bass hits, it is somehow sending current to my tower navigation white light.  Checked all grounds and they seem to be solid.  I guess we have a disco light now

My first thought is a ground issue, but I can't find any loose grounds and all of them are super solid with my exile system.  

[cowwboy]

Is yours a mechanical switch or a touch screen? 
With a lot of vibrations it's probably shaking a internal conductor to make contact. Possibly in a relay or the internals of a mechanical switch.

It'll be on the positive side not the ground. 

[hawaiianstyln]

9 minutes ago, cowwboy said:

Is yours a mechanical switch or a touch screen? 
With a lot of vibrations it's probably shaking a internal conductor to make contact. Possibly in a relay or the internals of a mechanical switch.

It'll be on the positive side not the ground. 

the tower light switch is in the electrical/digital MUX controller.  

[cowwboy]

I would guess that they use mechanical relays and not transistors due to cost. So you are either shaking the relay till it creates a contact or shaking the mux switch till it creates a contact. 
So get a smaller sub or start doing vibration isolation on stuff. 

My sub used to vibrate the memory chip out of it's socket on my perfect pass. So I know the struggles. 

[justgary]

My guess is that you are driving enough current in the speaker wire to induce a voltage into the light wire.  If so, using a twisted pair for the speaker wire or a shielded wire for the light (or both) may help.  

[hawaiianstyln]

interesting, makes sense Gary