Got a question. If I have the Stereo Playing and I hit the trim switch either for the drives or the tabs, I get a Pop though the system as soon at the solenoid engauges. Anyone else had this problem and if so, what did they do about it?

Thanks,
Matt

You have a bad ground some place. The other thing that can cause this is voltage drop if you have small wires.

Run your grounds from your stereo and amps if applicable straight to the battery.

The 2 Trim pumps on the Starboard Side are grounded straight to the Starboard Battery. The 2 on the Port Side are grounded straight to the Port Battery. The amps and deck are Powered and grounded to the Port battery with 4 Gauge. I dont see how i could have a bad ground unless the deck isnt grounded to that 4 gauge and is somehow grounded somewhere else. Hmmmmmmmmm

Could it be possible that the arc created by the contacts in the solenoid is like a miniture lightning strike? Your pops could just be the system picking up this discharge. I have heard similar with mine when I have forgotten to turn it off when starting the engines. I don't use the stereo with the engines running, no point can't hear it.

I would fallow all your grounds and see were they go. If they are grounded together to the battery directly (amps and head unit) then you may have a bad component. What kind of equipment do you have?

Its got to be a ground issue. I'm thinking the deck isnt grounded with the amps through the 4 gauge and since neither motor is in the boat now, I'm sure its that. I'm going to rewire the deck ground and go from there.

Had the same problem. It is a ground issue. Run a GOOD ground to the deck. Sounds like your amps are grounded good.

I think it comes from the amps picking up contacts in the other electronics, note sure you can cure it..like to know if you do though...Rob

Here's a few steps you can take to eliminate it or at least minimize it.
* Try lowering the amplifier input gain.
* Try an RCA ground loop isolator between the head unit and amplifier.
* Remove the source unit positive and negative from the factory harness and hook those up to the amplifier pos. and neg. at the amplifier and not at the battery. If you want to maintain the keyed function then add a relay.
* Ground the pump and pump relay to the engine block with a larger cable and quality lugs.
* Try a polarized 16 volt 10,000 MFD capacitor across the pos. & neg. of the pump supply or pump relay.
* Make certain that the batteries have good ground connections to the engine blocks.

Sorry I don't have better news. It's alot of effort. One or multiples of the above procedures usually work. Hope this helps.