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Unread 10-03-2015, 09:44 AM   #1
Gone Wild
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Default Backup lights on Precedent ?

Electrical dummy here...

I've trolled the threads and can't find the answer to my question...

I have a 2008 1/2 precedent (converted to 6x8v batteries) on which I've installed a 48v/12v reducer to run lights and accessories. I found a nice set of very small 12v led button lights that I would like to use as backup lights and wire them to the reverse switch. Problem is power across reverse switch seems to be 48v. I would prefer to not disable the backup buzzer. Is there a simple way I can tap the reverse switch into the reducer to provide 12v to the led's when the cart is in reverse mode...???
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Unread 10-03-2015, 10:31 AM   #2
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Default Re: Backup lights on Precedent ?

i am no mechanic by any stretch of the imagination but a thought would be to tie into your buzzer to a relay with your 12v power coming from your converter. I'm sure someone will chime in and give you a better idea or confirm what I just mentioned would work or not. I don't really know if you can get an automotive type relay that would work with the 48v signal.
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Unread 10-03-2015, 11:07 AM   #3
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Default Re: Backup lights on Precedent ?

A relay makes this a very easy task to accomplish. Finding an inexpensive relay with a 48 volt DC coil is the difficult task....
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Unread 10-03-2015, 12:27 PM   #4
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Default Re: Backup lights on Precedent ?

Why not just use a charger relay. Or to make it real simple put a switch next to the f/r switch.

Or you could use a double pole double throw switch for your f/r on one side and your backup light on the other side.
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Unread 10-03-2015, 12:40 PM   #5
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Default Re: Backup lights on Precedent ?

Using a 48v coil relay is the best option, they are less than $5.

I usually keep a few of these on hand for small projects on my golf cart:

Link to 48v 30 amps Normally Open contacts relay

You also need a flyback diode in parallel with the relay coil, the cathode (end with a stripe) goes towards the positive activation wire.

Link to 1N4007 diode

Put the relay coil (and diode) in parallel with the backup buzzer, run your backup lights +12v wire through the Normaly Open contacts of the relay.

I would not use the FNR since it is powered by the Tow/Run switch, which means if you leave the FNR in reverse, the relay would be activated even with the key OFF and the charger plugged in (not good for the relay coil in the long run).
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Unread 11-24-2015, 07:24 AM   #6
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Default Re: Backup lights on Precedent ?

Could you please attach a diagram on how to wire this with the diode? I am not very savvy at electronics, but would like to add the back up lights to my cart. I have a 48v ClubCar 2015.
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Unread 11-24-2015, 08:53 AM   #7
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Default Re: Backup lights on Precedent ?

In addition to the Relay and diode posted, You will also need 0.187" quick connects for the Relay Coil and 0.250" quick connects for the Normally Open Relay Contacts.

I usually have these spare parts at home, so I took this picture last time it was discussed and drew a quick schematic.

I also did a quick assembly on how I like to solder the "flyback" diode on the coil activation wires, You can just add some heat shrink tube over the soldered diode and it makes for a "stress free" connection.

Make sure the side of the diode with the "stripe" goes to the "positive" activation wire.
Attached Images
File Type: jpg 48v_relay_connection.jpg (456.3 KB, 0 views)
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Unread 11-24-2015, 09:38 AM   #8
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Default Re: Backup lights on Precedent ?

great diagram Sergio
I am sure this will help many others doing projects like this
I used that exact same relay and diode combo to switch my voltage reducer on and off when I turn on the key switch

That way NO ONE can leave the radio, or lights or my power inverter running all the time and kill my batteries

Dale D
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Unread 11-24-2015, 10:47 PM   #9
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Default Re: Backup lights on Precedent ?

Thank you Dale-D and Sergio. If you could make a little more detailed drawing it would be much appreciated. As I mentioned, I am not the best at electronics, but with proper instruction, I can get it right. Thanks.
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Unread 11-25-2015, 09:00 AM   #10
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Default Re: Backup lights on Precedent ?

The diagram Sergio drew alongside the exact relay should be all you need
I had left out the Diode in mine, but added it after seeing his drawing
Serves stabilize the relay ( kind of a bounce back preventer )

I used that to break the contact wire on my voltage reducer that was factory installed by Club Car, that way when I turn off the key switch, EVERYTHING goes off, including the Voltage Reducer, which runs everything else on the cart......This means that the Voltage reducer is no longer running and drawing off the pack ( no matter how small it draws )

Thay way no one can leave the lights or a radio running while the key is off

Thanks again Sergio

Last edited by Dale-D; 11-25-2015 at 09:01 AM.. Reason: added a thanks to Sergio
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