Corsa Exhaust Diverters

Patphish

Recruit
Joined
Aug 24, 2017
Messages
1
Hi All, just a quick question. I am need of replacing or rebuilding my corsa Diverters. I have found a set but the solenoids are 4 wire and the harness on the boat is 3 wire can the solenoid be re wired to fit the 3 wire harness. All colors match with the expection on the green wire on the solenoid which I assume is ground. Also is pulling the y Diverters simple. It looks fairly straight forward just a few hose clamps. Thanks
 

alldodge

Moderator
Staff member
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Mar 8, 2009
Messages
43,398
The short answer is No.

The 4 wire uses a high and low current legs, one is high to bring the solenoid in, then switches to lower current to keep it in.

3 wire.gif

4 wire.gif
 

thunder550

Petty Officer 3rd Class
Joined
Sep 6, 2017
Messages
83
I replied to your thread on THT but just to sumamrize for members here as well, yes you can:

http://www.thehulltruth.com/boating-...diverters.html


The 3 wire solenoid is actually a 4 wire solenoid with an inline time delay relay. The time delay relay has 3 wires coming into it from the main harness (black, white, red) and 4 wires going out of it (black, white, red, green). I believe that if you cut the relay off the 3 wire solenoid you can match up the 4 wires and call it good.

If you pull the wire loom off of the solenoid pigtail you'd see the following:

Solenoid -> 4 wires -> Relay -> 3 wires -> black connector

You would cut the 4 wires between the solenoid and relay. The way these solenoids work is that there are two separate solenoids in one. Green + White wire makes one circuit, this is the high current "pull" solenoid. White is power and green is ground. This circuit should only be energized for about 2 seconds, just enough time for it to actually pull the flappers open. There's also a low current "hold" solenoid, red is power and black is ground for this circuit. This one doesn't have enough power to pull the flappers open but does have enough to hold them open after the "pull" solenoid does it's job. This circuit is designed to be energized as long as you want the flappers to stay open.

My understanding is that your existing system (I'm assuming with the white 4 wire connectors) and the newer style system (with the 3 wire black connectors) both operate identically. The difference is that in your style system, the time delay relays (which are responsible for powering and then cutting off the "pull" solenoid after 2-ish seconds) are built into the harness that's wired into your boat, whereas the new style system has the time delay relays built into the pigtail on the solenoid to simplify replacement.


I also have a write-up on how to adapt a GenIII 3-wire solenoid to a GenI 2-wire system here for anyone who is interested:
http://www.thehulltruth.com/boating...sa-captain-s-call-solenoid-2-wire-system.html
 
Last edited:

alldodge

Moderator
Staff member
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Mar 8, 2009
Messages
43,398
Sounds good, always look forward to learning something new, thanks

Maybe do a follow up in a year and see if there have been any surprises.
 

thunder550

Petty Officer 3rd Class
Joined
Sep 6, 2017
Messages
83
We took the boat out Saturday and Sunday this past weekend, no issues either day.
 
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