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Wiring for a volvo penta 2003 marine diesel

Anyone familiar with the wiring circuit for a volvo penta marine diesel 2003 non turbo? Mine has a special elctrical system to prevent stray current from the starter circuit and uses two solenoids. All the manuals I have seen show a single solenoid. I believe the engine is a 1993 model. I am not sure which wires go to the solenoid which is not attached to the starter motor? I think the B- from the alternator goes to one of the main solenoid contacts other main contact is connected to the battery negative terminal. A red and yellow 1.5mm wire goes to one side of the energiser coil and is positive. The negative side to the energiser coil is to/from where? I guess there should also be a lead from the B+ terminal of the alternator but where does this go?

Posted by Anonymous on


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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: volvo penta boat manual

Thank, but I have managed to get manual on engine

Posted on Aug 21, 2008

  • 8 Answers

SOURCE: Converting From 12/24 to Starght 24 Volt

The batteries must be connected in SERIES. The method described is proper, but the name of the method is wrong.
On the female plug for the motor on the boat, if you have the wiring for TWO separate batteries coming to the plug, the male plug must have a jumper in it. To find out, disconnect the batteries one at a time and voltage check to see if there are two separate battery systems there. There probably are. If so, the series circuit is provided for in the male plug by the jumper and not in the back of the boat where the batteries must be wired independent of each other.

Posted on Nov 28, 2008

  • 599 Answers

SOURCE: starter stays enegaged on 1990 mustang gt

sounds like solenoid is shorted to ground internally

Posted on Dec 02, 2008

  • 152 Answers

SOURCE: battery to starter motor.

Just to be clear, the starter should have a large terminal (where the battery cable connects) and a smaller terminal (where the activation wire connects)
The starter is grounded via the mounting bolts.
The activation wire runs from the starter to the starter switch.


Posted on Mar 28, 2009

  • 114 Answers

SOURCE: Need a wiring diagram for a 1969 Ford F250.

there should be a slot for each wire on back of ignition play with them till you get it right cant hurt anything

Posted on Jan 14, 2010

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