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Sat Nav Connection

sat nav electrical

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#1 Max1983

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Posted 21 March 2016 - 12:45 pm

Hi All,

 

So, when I bought my 3DV last year the previous owner has attached a cigarette lighter charger to the battery, so over the winter I have ran my car sat nav wire from the handle bars under the tank into said socket. I also have a battery optimizer attached to the battery. I took the bike out yesterday with the sat nav attached so I could test, however after a couple of hours when I stopped  for fuel the bike wouldn't start again and the battery was completely flat. This wasn't the first time I had stopped during the ride, it was probably about the 3rd time I fired the bike up in those 2 hours. I bumped started the bike and got home, plugged back into the optimizer and after a few hours the battery was charged.

 

Now what was the cause of this? Was it because I have attached the sat nav directly to the battery, therefore when the engine is not running the sat nav is still drawing power from the battery and thus eventually draining it?

 

In my mind there are 2 solutions to this and wondered what other owners had done.

 

Solution 1 - Each time I ride with the sat nav and come to a stop (for fuel, brew etc.) I should unplug the wire from under the seat to stop the sat nav drawing power. Simple solution, just need to remember to do it.

 

Solution 2 - Wire the sat nav up to the rear brake light switch so that it only draws power when the ignition is on. I am no expert when it comes to electrics, therefore has anyone done this and would anyone suggest that this is the better option, also how do I do this?

 

Thanks

Andrew



#2 Kelpie

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Posted 21 March 2016 - 01:05 pm

Can't you simply switch your satnav off? If you only filled up with fuel, it's unlikely a satnav would drain your battery in a few minutes. You sure your battery isn't in the way out?
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#3 ChrisG

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Posted 21 March 2016 - 01:19 pm

Front brake light switch might make more sense for satnav, my heated grips are wired through there.

 

Worth checking your bike's charging properly, reg/reg failures are fairly common on the Mk1, if you've got a multimeter have a quick run through this http://www.electrosp...ing-diagram.pdf


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#4 Max1983

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Posted 21 March 2016 - 01:44 pm

Can't you simply switch your satnav off? If you only filled up with fuel, it's unlikely a satnav would drain your battery in a few minutes. You sure your battery isn't in the way out?

Thats what I thought, but as soon as I plug the wire into the charger, there is a green light on the sat nav wire indicating that power is being drawn, thus how I came up with solution 1.


Front brake light switch might make more sense for satnav, my heated grips are wired through there.

 

Worth checking your bike's charging properly, reg/reg failures are fairly common on the Mk1, if you've got a multimeter have a quick run through this http://www.electrosp...ing-diagram.pdf

Thanks, are there are stickies on here that gives a guide on how to do this?



#5 leehenty

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Posted 21 March 2016 - 06:18 pm

Best way is connect accessories socket through a relay so when bike is off socket is off. Use a feed which goes live on ignition to control relay.
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#6 Hombre

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Posted 21 March 2016 - 09:08 pm

I have a 12V cig socket in the dash - a marine one with rubber cover. It is wired from the ignition supply +ve and regulator -ve. A battery optimiser connects to it via a fused cig plug. Phone as sat-nav plugs in via a USB cig to USB plug.

There are no battery issues. Your symptoms sound like they would exist without the wiring mod.

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#7 fixitsan

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Posted 21 March 2016 - 09:24 pm

Hi All,

 

So, when I bought my 3DV last year the previous owner has attached a cigarette lighter charger to the battery, so over the winter I have ran my car sat nav wire from the handle bars under the tank into said socket. I also have a battery optimizer attached to the battery. I took the bike out yesterday with the sat nav attached so I could test, however after a couple of hours when I stopped  for fuel the bike wouldn't start again and the battery was completely flat. This wasn't the first time I had stopped during the ride, it was probably about the 3rd time I fired the bike up in those 2 hours. I bumped started the bike and got home, plugged back into the optimizer and after a few hours the battery was charged.

 

 

Andrew, put a voltmeter across the battery and measure the voltage, with the ignition on, then with the engine idling, then with the engine at 3500rpm

 

Your problem is incredibly unlikely to be related to your satnav, which at the most will draw half an amp with a flat battery and much less if the internal satnav battery is fully charged. A half amp drain will reduce battery capacity (10Ah battery) 5% after 1 hour, if all other components are working correctly.

 

At least try the same without the satnav connected if you haven't got a voltmeter, but not having a voltmeter and having a motorcycle seems an unlikely thing to me :)


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