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Offline alan sh

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Adding electrics
« on: 27 March, 2018, 04:41:42 PM »
I was asked to write up how I add accessories to my bikes. This is how.

Everything is controlled using the ignition key, but as all the power actually comes from the battery, you are not stressing any Honda wiring.

You will need a relay, a distribution box and appropriate fuses, some connectors and wires. You will need to know how to solder and how to crimp the connections.

This is a relay:


This is a distribution box



This is the diagram of what you connect to the relay





So, first thing is to take a wire from a switched point to the relay. The one I chose was from the rear brake light switch. You will see two wires - one going in and one coming out. You want the one that has power to it even if the brake is not depressed. They are both black, so best of luck working out which is which. What I do is separate the insulation leaving the bare wire underneath. Then I wrap the end of a wire around it and solder it. You can also buy special connectors which grab the wires and connect them without cutting into the insulation, but I have never used them.

Once you have that wire, run it up to the relay and connect it, using those connectors, to terminal 86 (see diagram above). Connect a wire from terminal 85 to earth (battery is best). These two then control the relay switch itself. Basically, when power is applied to 86 (via the ignition), it closes a circuit and connects terminals 30 and 87. When power is lost, the switch opens and the connection between 30 and 87 is dropped.

So, now you want to connect a wire - a decent thickness - from the positive battery terminal to terminal 30. Make sure you add an in-line fuse (also available from Halfords, Maplins etc.).

Lastly (for the relay), you connect terminal 87 to one side of your distribution box. I actually split that into 4 and connect it to all 4 connectors on one side of the distribution box. That then gives me 4 accessories to connect, all of which will be controlled by the ignition.

The other side of the distribution box has 4 spade connectors. Each one can then go to the power input of your device. Once you have connected it all, put an appropriately sized fuse (they are car fuses, available at ....) inbetween input and output.

I have:

Heated grips
Garmin Satnav
Autocom
USB block for charging things.

That's about it really. It is not hard to do. If you want me to do it for you, then just pop over to Rochdale.
« Last Edit: 27 March, 2018, 04:44:10 PM by alan sh »
Red MK II with full luggage, MRA screen, hugger, crash bungs, heated grips and Autocom.
CB1300SA with a few bits.
https://ourbikingholidays.wordpress.com/
https://mybikinghistory.wordpress.com/

Offline alan sh

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Re: Adding electrics
« Reply #1 on: 27 March, 2018, 04:45:46 PM »
I was trying to add a small article (above) but the main diagram won't appear.

It shoud be this:



If it doesn't appear, can the admin remove this post as I don't seem to be able to do that either.

[edit] AGGHH!

Admin - please get rid of this lot.

Alan
Red MK II with full luggage, MRA screen, hugger, crash bungs, heated grips and Autocom.
CB1300SA with a few bits.
https://ourbikingholidays.wordpress.com/
https://mybikinghistory.wordpress.com/

Offline HGP

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Re: Adding electrics
« Reply #2 on: 28 March, 2018, 05:52:28 PM »
Good info Alan.
I had a go at wiring up accessories last year. I used a 5 pin relay that lets you connect an optimate lead to one of the pins so when the ignition is off you can plug in your battery charger. I put all the components inside a maplin's project box under the left hand side panel. All works a treat.
Tried to add a few pictures but not letting me for some reason.

Offline alan sh

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Re: Adding electrics
« Reply #3 on: 28 March, 2018, 09:18:55 PM »
All the pictures now work. Weird.

Alan
Red MK II with full luggage, MRA screen, hugger, crash bungs, heated grips and Autocom.
CB1300SA with a few bits.
https://ourbikingholidays.wordpress.com/
https://mybikinghistory.wordpress.com/

Offline Ali-bear

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Re: Adding electrics
« Reply #4 on: 29 March, 2018, 09:58:54 AM »
Thanks for the info.
How do you run wires from the under-seat area to the headstock area? Is it possible to lift up the tank a little, enough to pass wires through, without having to disconnect the petrol pipes or anything else?
Designed in Japan, assembled in Italy, fiddled with in Britain

Offline alan sh

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Re: Adding electrics
« Reply #5 on: 29 March, 2018, 10:15:38 AM »
Yes, it is possible to do it without lifting the tank at all.

Alan
Red MK II with full luggage, MRA screen, hugger, crash bungs, heated grips and Autocom.
CB1300SA with a few bits.
https://ourbikingholidays.wordpress.com/
https://mybikinghistory.wordpress.com/

Offline Boris

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Re: Adding electrics
« Reply #6 on: 29 March, 2018, 08:08:41 PM »
I wired in a relay last year for just a single accessory (USB charger). The following morning I found the battery completely drained. Is a relay supposed to draw current when the circuit is open? I've just bought a sat nav so will have to have another go at wiring it all in. I like the fuse box idea. Makes it very neat.

Offline alan sh

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Re: Adding electrics
« Reply #7 on: 29 March, 2018, 09:39:35 PM »
No it should not drain the battery when off. Can you check it against the diagram I posted above?

Alan
Red MK II with full luggage, MRA screen, hugger, crash bungs, heated grips and Autocom.
CB1300SA with a few bits.
https://ourbikingholidays.wordpress.com/
https://mybikinghistory.wordpress.com/

Offline Boris

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Re: Adding electrics
« Reply #8 on: 29 March, 2018, 09:42:19 PM »
It's off the bike now but I've got a feeling it was a 5 legged relay, not 4. I'll follow your instructions when I attempt it again.

Offline Boris

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Re: Adding electrics
« Reply #9 on: 14 April, 2018, 09:35:45 AM »
What size relay did you use? Is a 200A a bit of an overkill?

 


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