Testing an old Autohelm 1000

[richardabeattie]

The fuse has blown at the panel so either there is a short in the cable or deck socket (to be checked when I am next at the boat) or there is a fault in the Autohelm itself. I have it at home and want to connect 12V to it. But the plug is two pin with no polarity marked. Polarity must matter because the plug has a cut out to ensure it can only be put into the socket the right way round. Will I blow it up if I guess wrong? Or should I wait until I can get back to the socket and establish which is the + side?

 

[VicS]

The fuse has blown at the panel so either there is a short in the cable or deck socket (to be checked when I am next at the boat) or there is a fault in the Autohelm itself. I have it at home and want to connect 12V to it. But the plug is two pin with no polarity marked. Polarity must matter because the plug has a cut out to ensure it can only be put into the socket the right way round. Will I blow it up if I guess wrong? Or should I wait until I can get back to the socket and establish which is the + side?

I have an old Autohelm 1000 ... I fitted the plug on the lead and wired the socket myself but I forget after all thse years how i knew what was the correct polarity but I guess the wires are colour coded.
You can down load the owners manual/ installation instructions from Raymarine's website. I am sure that will tell you.

You dont say if thie is the original analog one or the later " micro " but both are listed https://raymarine.app.box.com/s/nwf2s5ha9xrltggghogu/folder/720704863


Brown is positive !

 

[richardabeattie]

No way into the plug to see the colours without cutting it off so I'll work it out from the socket when I get back to the boat.

 

[Red Panda]

If it's similar to my old AH2000, I just had the same question with mine - so I opened up the control box and used a meter set to continuity to check which wire was which at the plug end.

As above, brown is positive.

 

[VicS]

No way into the plug to see the colours without cutting it off so I'll work it out from the socket when I get back to the boat.

Exactly which model are we talking about ? I guess not in fact one of the "old Autohelm 1000" models which were either supplied without a plug or with a ( now obsolete) "Dri plug"

If this is in fact the later Raymarine ST1000 then you will find wiring details in the owners manual ( which you will find at https://raymarine.app.box.com/s/14ysxitaiit206zh5hkvm7maia4t2qqw/file/23740655775 if you have mislaid your copy )

See chapter 4, section 3 on pages 40 et seq in the above link