Wiring harness diagram 2008 AJ 290

[Nexterday]

Working through a SmartCraft Alarm Engine voltage issue “main power relay is not working properly.“ This is for ENG2. Turn on the masters, and you get the constant audio alarm. Pulled apart relay and connectors all clean and intact. Good voltage and charging on all batteries. 10.3 volts on Smartcraft for #2. Low voltage indications on electronics.
I am looking for the wiring diagram so I can trace the issue. Googling “Mercruiser 350 Mag MPI” explodes my computer screen with options.

Thanks for the help!

Nexterday

 

[techmitch]

Page 19 here https://owners-resources.searayweb.com/owners-manuals-files/2008_290 Amberjack_290 Amberjack.pdf

Here is your parts manual also. https://s3.amazonaws.com/srweb-pvt-...rts-Manual_Amberjack-290-Parts-Manual-Pdf.pdf

Welcome to CSR.

 

[Nexterday]

Thanks, Techmitch! I have the owners manual. Pages 19-23 are pretty greasy from handling. The parts manual helps with head problems and others, but I am searching for the schematic for the engine wiring, so I can trace my voltage issues.
thanks again!

 

[techmitch]

Thanks, Techmitch! I have the owners manual. Pages 19-23 are pretty greasy from handling. The parts manual helps with head problems and others, but I am searching for the schematic for the engine wiring, so I can trace my voltage issues.
thanks again!

What engines, Mag/Horizon etc. ?

 

[Nexterday]

What engines, Mag/Horizon etc. ?

350 Horizon V Drives

 

[techmitch]

Try one of these: https://www.marinepartsexpress.com/Merc_Schematics/index.php?dir=350+MAG+MPI+HORIZON+MIE/