Offshoreonly.com

Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   Mercruiser 496 proplem (https://www.offshoreonly.com/forums/general-q/369770-mercruiser-496-proplem.html)

PA.WOODCHUCK 03-31-2021 12:03 PM

Can you post the color of wires on relay? I maybe able to look at wiring diagram I have(2002 496) to see what it controls? engine year?

JohanSweden 03-31-2021 12:17 PM


Originally Posted by PA.WOODCHUCK (Post 4783842)
Can you post the color of wires on relay? I maybe able to look at wiring diagram I have(2002 496) to see what it controls? engine year?

Thank you! Engine year 2003
Here is two pictures of the relay cables
To me it looks like
Blue with brown stripe
Brown/or purple with orange/or red stripe
Pink with white stripe
Blue and little yellow on it?


https://cimg2.ibsrv.net/gimg/www.off...951ad0bc6.jpeg
https://cimg4.ibsrv.net/gimg/www.off...961fe8bd4.jpeg


JohanSweden 04-01-2021 09:48 AM

The only wiring diagram I found is this.
But the colours dont match with the two relays on the diagram.


https://cimg7.ibsrv.net/gimg/www.off...598ce7b87d.png

AllDodge 04-01-2021 10:37 AM

Wire colors are different but that should be the trim pump relay which is used with smartcraft

JohanSweden 04-01-2021 10:52 AM


Originally Posted by AllDodge (Post 4783962)
Wire colors are different but that should be the trim pump relay which is used with smartcraft

Yes the colors to this relay is:
Pink w/ white stripe
Blue w/ yellow stripe
Purple w/ red stripe
Blue w/ red/or purple stripe

the only wiring diagram I found is this, but the picture is cut right where the relay is at the bottom, of course..

https://cimg1.ibsrv.net/gimg/www.off...4e47dd5da.jpeg

But you say it is the trim pump relay..
Hmmm.. I wonder why its clicking.

I dont have the drive on the boat yet.
I have not filled up the drive lube yet too.
I havent touched the trim pump, only the ground cable. But it looks like it has good ground on the back of the engine..

https://cimg7.ibsrv.net/gimg/www.off...3026b1306c.jpg


thanks



JohanSweden 04-01-2021 11:21 AM

Problem solved!

it was as AllDodge said the trim pump relay.

I turned on the key (did not starting the engine).
Moved the gimbal housing where the drive should be (i Dont have the drive on right now) and the clicking disapeared.

I think it was something with the connection between trim sender and trim pump/trim pump relay ore something

87MirageIntruder 04-01-2021 11:37 AM

Nice work AllDodge!

BIGSLOW 04-01-2021 12:05 PM

A lot of good information in this post. Glad it is all coming together for you!

What ended up being wrong with your heads that they needed rebuilt? Did you end up having a bent pushrod? How was the pressure test on the headers?

JohanSweden 04-01-2021 12:05 PM

Just a question again about same problem.

When I turn the key off, and turn it on again (not starting the engine) the trim pump relay is clicking again.

Is it because the drive aint on place, and the trim sender/trim pump relay doesnt know why the ”trim arms” isnt align with the gimbal house/drive?

AllDodge 04-01-2021 12:09 PM

If the PCM is not getting the correct info (unsure about what is installed, so its trying to adjust). Just remove the the relay for now


All times are GMT -5. The time now is 07:47 AM.


Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.