Volvo Penta Alarm Module - Simpler fix

[Purple Velvet]

Impressive.
How would this connect to the wiring looms I have?

At the moment it wouldn't as I haven't finished it, there are some errors and omissions. However the four way screw connector would go to the senders and the connectors next to the LEDs would go to your panel lights. I suppose you could cut the existing plug leads off and connect them that way.

As said, it is a quick and dirty layout just to show possibilities, it will be more work to make it fit for purpose. Once complete, it takes a fortnight or three weeks to receive the boards. They are simple enough for anyone to build who can solder.

 

[ithet]

The “board” is actually a sealed block of plastic, with the connections & wires protruding from the back, there is no sign of the board itself, nor of the diodes. I assume the diodes are inside the sealed block.
I sourced the diodes after referring to the diagram supplied by one of the other contributors above & they are as he listed on the diagram IN4001S.

I think the addition of the external diodes when the internal Zener has blown, makes the lamps work in a similar way to the simple circuit I posted (which is not an original design by me).

 

[wizzer]

I think the addition of the external diodes when the internal Zener has blown, makes the lamps work in a similar way to the simple circuit I posted (which is not an original design by me).

Lamps work.
Buzzer doesn’t