Starter solenoid PN

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   Good morning and Happy Monday. Set the popcorn aside ( for a moment ) please.
Starter Relay is confirmed to be wired correctly. Ignition key switch is verified to be wired correctly. Alternator has all the connections right and tight as well as the starter. Boat starts but will not turn off. For some history, I am not the original owner of this vessel so I do not know what has taken place over the years with it's wiring nor repairs completed. That said, I did come across something of interest. Previously I found (2) wires going to the key ignition switch going to the "I" terminal - a Purple one and a Light Purple (Lavender maybe Pink?) one. I traced the Light Purple one back to the Safety Kill Switch located at throttle area. 
Now, this Light Purple wire is GIVING me 12v from the kill switch side. Is this normal? Where is it coming from?  So, I disconnected it from the other Purple wire and my dash lights are now working as they should. That wire is still sitting live wrapped in tape under my dash. Where is that wire supposed to go? and Where is it getting it's power from? Hmmmm
I'm ordering (2) new Fuel Relays today per your previous advice - that might be a solution and will check a box to eliminate any question there.

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Feyer Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: March-29-2025 Location: Phoenix Status: Offline Points: 15	Post Options Post Reply Quote Feyer Report Post Thanks(0) Quote Reply Posted: April-28-2025 at 10:00am
	Good morning and Happy Monday. Set the popcorn aside ( for a moment ) please. Starter Relay is confirmed to be wired correctly. Ignition key switch is verified to be wired correctly. Alternator has all the connections right and tight as well as the starter. Boat starts but will not turn off. For some history, I am not the original owner of this vessel so I do not know what has taken place over the years with it's wiring nor repairs completed. That said, I did come across something of interest. Previously I found (2) wires going to the key ignition switch going to the "I" terminal - a Purple one and a Light Purple (Lavender maybe Pink?) one. I traced the Light Purple one back to the Safety Kill Switch located at throttle area. Now, this Light Purple wire is GIVING me 12v from the kill switch side. Is this normal? Where is it coming from? So, I disconnected it from the other Purple wire and my dash lights are now working as they should. That wire is still sitting live wrapped in tape under my dash. Where is that wire supposed to go? and Where is it getting it's power from? Hmmmm I'm ordering (2) new Fuel Relays today per your previous advice - that might be a solution and will check a box to eliminate any question there.

KENO Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11269	Post Options Post Reply Quote KENO Report Post Thanks(0) Quote Reply Posted: April-28-2025 at 5:39pm
	Shouldn't have 12 volts and right now that's the million dollar question. The jump start was not nice to something That purple wire is back feeding the ignition switch and powering the dash so with it disconnected from the other wire, it would seem logical that the dash behaves normally If I was curious, I'd pull the ECM relay and fuel pump relay and hook the battery up and see if anything changes while you're waiting on your new ones. Maybe you'll hear "the sounds of silence"

Feyer Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: March-29-2025 Location: Phoenix Status: Offline Points: 15	Post Options Post Reply Quote Feyer Report Post Thanks(0) Quote Reply Posted: April-29-2025 at 9:20am
	On it! Thank you

Feyer Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: March-29-2025 Location: Phoenix Status: Offline Points: 15	Post Options Post Reply Quote Feyer Report Post Thanks(0) Quote Reply Posted: April-30-2025 at 7:09pm
	....dumb question. As I read other forums re: issues with ignition, I see a lot of chat about "diodes". Does this '95 have any diodes I need to be looking for? That would explain power going in the wrong direction. New relays arriving tomorrow! Yay?

KENO Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11269	Post Options Post Reply Quote KENO Report Post Thanks(0) Quote Reply Posted: April-30-2025 at 7:57pm
	You bet it does Most people with diode issues seem to have a diode that dies and makes an open circuit so the engine won't run. Diodes can also fail so that flow will go in both directions though. The diodes are in the wiring harness a couple or few inches from the sockets that the relays plug into. Here's a thread with a lot of pictures where the diodes caused no start issues and he replaced them. It'll show where to find them and talks about testing them too. link

KENO Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11269	Post Options Post Reply Quote KENO Report Post Thanks(0) Quote Reply Posted: April-30-2025 at 8:12pm
	Also here's a link to the big GT40 service manual that you might already have,. It has some discrepancies since it was originally written for the OMC/Volvo Inboard/outboard version of this engine which was a year or so before the PCM version. link Lots of reading.....if you're having trouble sleeping it might just do the trick and knock you right out. A lot of it assumes you have all the right diagnostic equipment which most nobody does. Section 6 has some wiring diagrams for the ignition and fuel system, but there isn't one all inclusive complete diagram. They can be a big help though and they show the diodes. It's a good reference and has helped a lot of people. You're just a little different than most and have an engine that won't shut off

Feyer Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: March-29-2025 Location: Phoenix Status: Offline Points: 15	Post Options Post Reply Quote Feyer Report Post Thanks(0) Quote Reply Posted: April-30-2025 at 8:47pm
	That's good stuff right 'dere! Thank you. So digging in, "could" this be a reason I'm getting 12v coming FROM the lanyard kill switch towards the dash? I'll read up on that information, Thank you for sending that.

Starter solenoid PN

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