[heyhey]

Looking to install a BCDC1240 I have kicking around in the shed onto our camper trailer and wondering what the blue wire needs to connect to. For the time being, we're towing with the misso's Everest that has a smart alternator that needs the low voltage trigger on the BCDC, but may not need it for other tow vehicles.

How do you get the blue ignition/D+ wire back from the BCDC unit in the trailer back to the vehicle or to trigger?

The connection is a 12-pin plug and Anderson.

On a side note, can I run an un/regulated solar panel into the Anderson at the hitch connection?

 

[Harbourmaster]

heyday Give redarc a call they are really good to talk to, tech support 1300 733 272 mon to fri 6am-6pm (acst) someone from R&D will take the call and they know their stuff.

 

[AndrieK]

You’d have to run a D+ signal through the 12-pin trailer plug. Trailers in AUS generally don’t have reverse lamps or rear fog lamps, so if your 12-pin plug is wired correctly you should be able to use either pin 2 or 11.

If you then ever tow the trailer with a vehicle with a standard alternator, it’ll automatically isolate the blue wire on the BCDC as per the standard connection in your pic, assuming the other vehicle doesn’t have anything else connected via either pin 2 or 11.

 

[heyhey]

Would 8 or 9 also work? I assume they may be triggered by ignition to not run all the time.

Eitherway, thanks for the diagram, I'm going to test some pins

 

[flow]

have you ran the anderson plug yet? kickass sell a 3 pin anderson that has a blue trigger wire in it.

 

[heyhey]

No I haven't, but the Anderson on the trailer is already there. So to use their kit would be a rewire job

 

[flow]

No I haven't, but the Anderson on the trailer is already there. So to use their kit would be a rewire job

jup pop off the anderson and replace the end with a 3 and run your own wire. wouldnt have to rerun the wiring in the trailer.

 

[AndrieK]

Would 8 or 9 also work? I assume they may be triggered by ignition to not run all the time.

Eitherway, thanks for the diagram, I'm going to test some pins

In theory you could use any pin. The only time you'll have issues is when you try to tow the trailer with a different car, or a different trailer with the Everest. If the other car / trailer doesn't match your wiring, you'll end up with weird electrical issues.

I like @flow's idea though. I didn't know you get 3-pin Anderson plugs. Doing it this way will keep the BCDC wiring separate from the trailer lamp wiring, which means you won't run into issues with other vehicles / trailers.

 

[heyhey]

It seems a bit of informal industry standard is to use Pin 12 as the ignition/sensing feed

What You Should and Shouldn't Run through Your 12 Pin Trailer Plug

Why is your trailer plug is so important? We explore the 12 pin trailer plug a little further and explain why it is your electrical lifeline.

www.amae.net.au

 

[DirtyJ]

I have the vehicle Anderson feed switched with a solenoid and just connect the blue to + at the charger.

 

[heyhey]

Found the answer on RedArc's website How to wire BCDC from caravan to vehicle with variable voltage alternator | REDARC Electronics

Why can't they make it easier