Volvo Penta Engine - Control Panel Wiring

nigelmercier

nigelmercier

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Further to the thread about my recent purchase of the Volvo Penta DIY manual: http://www.ybw.com/forums/showthread.php?376558-Volvo-Penta-DIY-books

As I said in that thread, I have scanned the manual to keep an electronic copy, but I think it would be useful for others to see the revised wiring diagrams. The ones in the normal manual are misleading with regard to grounding, which caused a big problem on my boat.

http://www.bavariayacht.info/downlo... Panel & Engine Wiring Diagram DIY Manual.pdf

Am I correct in assuming that (if a slave control panel and diodes are not fitted), then the 16-way connectors are connected 1-1, 2-2 ...?
 
nigelmercier said:
Am I correct in assuming that (if a slave control panel and diodes are not fitted), then the 16-way connectors are connected 1-1, 2-2 ...?
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Yes I am pretty sure that is so but in some installations there is a diode network incorporated into the connecting cable.
 
nigelmercier said:
That was my question really. The manual shows the diode network in use when there are two panels, but says nothing of the situation when there is just one.
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Sorry its taken a while to re-discover what i was thinking of.

I am thinking of the "diode kit" in the wiring for MD22 ( and others ??)
 
nigelmercier said:
It is clear what the diode kit does with two control panels, but not how the engine connects to a single panel. Is the diode kit still used?
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I had not thought about why its required with two panels but I assumed one diode kit is necessary with one panel . Part at least of its purpose surely is to isolate the stop solenoid circuit from the pre-heater circuit so that the earthing relay closes when either is energised.

More your field of expertise than mine though!

I like the clarity of the diagrams ....... not got a decent one of the electronic module have you..... I have an idea some of the diagrams of these in the owners manuals might even be incorrect.
 
You may be right about the stop circuit, it's been a while since I looked at this and at the time I assumed I had a diode kit. I was just reminded of the diodes as I was scanning, and thought the circuits could be useful to others. If VP complain I will suggest they print them properly in the manuals.

Not sure which module you want, I'll show you my one if you show me your one. :)
 
Just interested in seeing a decent circuit diagram of a warning light module. That's all. Its a pretty complex network of diodes and a transistor but the diagrams in the manuals are poor ... only for illustration anyway I guess.
 
VicS said:
Just interested in seeing a decent circuit diagram of a warning light module. That's all. Its a pretty complex network of diodes and a transistor but the diagrams in the manuals are poor ... only for illustration anyway I guess.
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The cct in the old manuals is correct and complete for the old bare board warning module. I simulated it in a free program called Yenka (still got the simulation if you want it, you'd have to install Yenka) and proved it, then rebuilt the module from a 1985 engine, the tracks had corroded off the board. However it wasn't a very good module, could give confusing dual indications, I can't remember the details.
The new potted module (made by VDO I believe) is much better except prone to fail and expensive. I've never managed to find a cct for it. I cut a failed one open and there was a lot in it and some SMD, absolutely impossible to service. The new module is backward compatible.
 
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