Radio On Off On switch

[pompeylewis]

Had a slight brain wave the other day not sure if anyone else has done it but put one of these in. Handy if you have a camper with a second battery.

http://www.ebay.co.uk/itm/On-Off-On-Blac...OSwstJZXMn~

Put it in the cup holder just infant of the gear stick.

The centre connection of the three goes to the switched power on the radio. 

The number one connection goes to the previous switched power in to the radio.

The number two connection goes to the leisure battery and i've fused that.

Pull up for some camping switch two the number 2 and you can have tunes with out killing the main battery or having to put a second radio in. All for the price of £2.

Will put a few pics on when I work out how to am new to this!!!

[Bob Barringer]

Great idea, will keep an eye on your post.
Thanks.

[dumdum]

That's all good but you must also swap the mainpowoer feed to the radio to the leisure battery otherwise the radio will draw current from the vehicle battery while your parked up

I've done exactly this in my fiat Ducato campervan

I also re did the power supply to the front charging socket so it's from the leisure battery while I was at it, that way it's perm live and ideal for charging phones/tablets etc while parked up

[pompeylewis]

That's all good but you must also swap the mainpowoer feed to the radio to the leisure battery otherwise the radio will draw current from the vehicle battery while your parked up

I've done exactly this in my fiat Ducato campervan

I also re did the power supply to the front charging socket so it's from the leisure battery while I was at it, that way it's perm live and ideal for charging phones/tablets etc while parked up

Will it?

That feed from the vehicle battery is turned off as soon as you take the key out anyways? So confused how it can do that? Ive voltage tested it at that point and theres very there. The only supply it will carry on getting from the vehicle battery is the one for the memory? 

The switch is a single pole centre off switch. So with that line broken to the vehicle it can't draw any power?

Lewis

[pompeylewis]

That's all good but you must also swap the mainpowoer feed to the radio to the leisure battery otherwise the radio will draw current from the vehicle battery while your parked up

I've done exactly this in my fiat Ducato campervan

I also re did the power supply to the front charging socket so it's from the leisure battery while I was at it, that way it's perm live and ideal for charging phones/tablets etc while parked up

Will it?

That feed from the vehicle battery is turned off as soon as you take the key out anyways? So confused how it can do that? Ive voltage tested it at that point and theres very there. The only supply it will carry on getting from the vehicle battery is the one for the memory? 

The switch is a single pole centre off switch. So with that line broken to the vehicle it can't draw any power?

Lewis

[dumdum]

That's all good but you must also swap the mainpowoer feed to the radio to the leisure battery otherwise the radio will draw current from the vehicle battery while your parked up

I've done exactly this in my fiat Ducato campervan

I also re did the power supply to the front charging socket so it's from the leisure battery while I was at it, that way it's perm live and ideal for charging phones/tablets etc while parked up

Will it?

That feed from the vehicle battery is turned off as soon as you take the key out anyways? So confused how it can do that? Ive voltage tested it at that point and theres very there. The only supply it will carry on getting from the vehicle battery is the one for the memory? 

The switch is a single pole centre off switch. So with that line broken to the vehicle it can't draw any power?

Lewis

Yes it's the memory one I'm referring too, which one has a bigger current draw when the radio is active regardless of which one makes it work i.e. Is the switched live, it could very well draw more current from the permenent live and therefore drain your van battery, I think your mixing up what my first post refers to or your a little confused yourself??
Above you say the feed from the vehicle battery (presuming you mean via the ignition not direct from the vehicle battery??)  is turned off when you take the key out (as I say this isn't from the vehicle battery as such, it's from the ignition so that one wouldn't be a concern as it's diverted through your switch from the rear to turn the radio on when camping say) and you also agree there a permenent live that's from the battery direct... this is what I'm referring to as being a source of drain on the vehicle battery, so feed this from the rear battery as well so if your parked up and listening there's no drain on the front battery (you may be assuming all the current to the radio in use comes from the accessory/ignition fed wire... I'd double check that if that's your assumption and that the accessory wire doesn't just switch a transistor and allow the big permenent feed supply other areas in the radio

[pompeylewis]

That's all good but you must also swap the mainpowoer feed to the radio to the leisure battery otherwise the radio will draw current from the vehicle battery while your parked up

I've done exactly this in my fiat Ducato campervan

I also re did the power supply to the front charging socket so it's from the leisure battery while I was at it, that way it's perm live and ideal for charging phones/tablets etc while parked up

Will it?

That feed from the vehicle battery is turned off as soon as you take the key out anyways? So confused how it can do that? Ive voltage tested it at that point and theres very there. The only supply it will carry on getting from the vehicle battery is the one for the memory? 

The switch is a single pole centre off switch. So with that line broken to the vehicle it can't draw any power?

Lewis

Yes it's the memory one I'm referring too, which one has a bigger current draw when the radio is active regardless of which one makes it work i.e. Is the switched live, it could very well draw more current from the permenent live and therefore drain your van battery, I think your mixing up what my first post refers to or your a little confused yourself??
Above you say the feed from the vehicle battery (presuming you mean via the ignition not direct from the vehicle battery??)  is turned off when you take the key out (as I say this isn't from the vehicle battery as such, it's from the ignition so that one wouldn't be a concern as it's diverted through your switch from the rear to turn the radio on when camping say) and you also agree there a permenent live that's from the battery direct... this is what I'm referring to as being a source of drain on the vehicle battery, so feed this from the rear battery as well so if your parked up and listening there's no drain on the front battery (you may be assuming all the current to the radio in use comes from the accessory/ignition fed wire... I'd double check that if that's your assumption and that the accessory wire doesn't just switch a transistor and allow the big permenent feed supply other areas in the radio

[dumdum]

As an auto electrician for 20+ years listen to the leccy guys! You will be fine taking the perm feed from the rear battery, no need for a double pole switch, in my Ducato I actually found the fused feeds in the fusebox and intercepted at the inputs to the fuses so it's got a main fuse for both feeds and also the individual fuses proper but I suspect you won't be able to do it like this in your case as I bet it's a shared fuse for other things ? You could also rewire interior lights in rear off the second battery aswell, if your after some neat interior lights have a look for hafele flush mounted 12v round units, they are 6mm deep, I use 7 in a swb Ducato and it's like daylight, 2 or 4 would be immense in a Berlingo

[pompeylewis]

As an auto electrician for 20+ years listen to the leccy guys! You will be fine taking the perm feed from the rear battery, no need for a double pole switch, in my Ducato I actually found the fused feeds in the fusebox and intercepted at the inputs to the fuses so it's got a main fuse for both feeds and also the individual fuses proper but I suspect you won't be able to do it like this in your case as I bet it's a shared fuse for other things ? You could also rewire interior lights in rear off the second battery aswell, if your after some neat interior lights have a look for hafele flush mounted 12v round units, they are 6mm deep, I use 7 in a swb Ducato and it's like daylight, 2 or 4 would be immense in a Berlingo

Ended up with these lights in the back. Cheap and cheerful had some of these in the caravan and they done the job :-) Have put a separate fuse box in the back. i'll look at those lights for the next project. 

Thanks I'll run it like that then! Am better with the mechanical stuff!   And thinking about it with a double pole switch in the instant you change over it will have nothing so it will bin the memory! so wouldnt work anyways grrrr

[ghost123uk]

If your leisure battery has a proper split charge system in place, there is no need for a switch for either the main feed to the radio, or for the memory feed.

Just permanently wire both the radios power wires to the leisure battery. As soon as you fire up the engine, the split charge relay will kick in and whilst charging the leisure battery, will also power the radio just fine. This is how I did it on my previous camper (80's VW T25).

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However, I did read on here, a while back, that the BSI has some radio related settings in it. When I suggested a similar wiring arrangement (to bypass that stupid "Eco Mode" turning the radio off) I was advised against it as, with the standard wiring, the radio power feed comes from the BSI and re-arranging the feeds away from the BSI would confuse the BSI and could cause problems.

This is only 3rd party information, and could be rubbish. Anyone who knows care to comment?

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Also, will the remote "stalk" functions and the radio's remote readout display still work if ONLY the head unit's power feeds are re-located?