454 mag Silent choice doesn't work!!!
 

I have a 1996 crownline 454 mag with Silent choice exhaust and I cant find a wiring diagram. When I hit the switch it lights up but the silent choice actuators do nothing. The exhaust stays close to thru hull. I can manually pull them open but i want the button to work. The guy I bought the boat told me the breaker kept popping on this and all that needed to be done was to push the button but that didnt work. Ive tried tracing the wires but they are in the harness. I have the manual 16 but it only has troubleshooting for air pump style and not electric which i have. I feel like there may be a fuse somewhere Im missing but without a diagram I cant hardly troubleshoot it or tell where a fuse may be.

Mine started doing that also, and it was the control piece inside the harness in most cases, but can also be the solenoids. If its the old 4 wire ones, I would just upgrade to the newer 3 wire and new harness. That's what I did

Ill have to do some research but I believe its the standard/stock mercruiser silent choice with two wires on it. Let me look into what I have. I feel like there has to be a fuse somewhere and Im missing it.

It is definitely two wire but I believe it is Corsa exhaust.

It has only 2 wires feeding the control in the harness, but has either 3 or 4 wires from the control to the solenoids

I haven't checked the other side but I will. First where can I find the "control in the harness"? I was able to look at one of the solenoids and two wire have post on the solenoid but there is a 3rd red wire that is cut. Its about a foot long and is attached to the accessories post on the solenoid. I assumed it was for amp and speaker system but no I'm thinking this is why it isn't working. I don't see anything where it should go or another wire somewhere else. a schematic for mercruiser with the electric exhaust would be most helpful right now.

Unable to find a diagram but the link previously posted has how to test the parts and harness.

Here is another discussion
https://www.offshoreonly.com/forums/...e-problem.html

Good info Alldodge. I called corsa and they sent me the wiring diagram. Now if I can find the solenoids for the exhaust I can test it.

They should be sitting on top on the diverters.

Ken

I meant to say "if I can find the relays"

So i got the engine back together and I found a wire on one of the solenoids that was cut. I spliced it back to the solenoid after I found it tucked in a mess of wiring in its tube. Still no luck. I havent had a chance to look into powering of the solenoids yet but I will and post back.