What to do with memory wire in 12v stereo

[googledave]

So I’m installing a 12v stereo into a 24v 70 series. I have a step down converter,but have no clue how to wire up the memory wire.. I’ve searched but can’t find any answers… other than to get an aux 12v battery, but i don’t have room for that. any help would be appreciated… thanks!

 

[Felde]

Hi
There a basically three options :
1. If you want the memory to stay AND not go through 2. or 3., you need to wire the DCDC step-down in a way it is permanently on. That is where to attach the memory straight.
I put a relay on the ignition switch to turn main power for the radio and other 12V consuming units on/off by ignition.
Downside: the DCDC step-down nevertheless puts a permanent idle draw on your battery and will eventually drain it. Not ideal.
2. Take 12V from one of your two starter batteries.
Downside: Serial battery setups suffer from drawing load from one battery only. The memory load is very little, but stil ... Not ideal
3. Take another 12V battery. Easy if you have a house battery anyway. In any other case: Difficult, in particular for recharging.

I eventually ditched the 12V unit and got a 24V unit for trucks. Quite cheap on Amazon.
Good luck Ralf

 

[ATL Cruiser]

Doesn't the stock Toyota inverter behind the glovebox have a constant 12V wire AND an ACC 12V wire?

That's how my radio is wired in. I thought they were all like that.

I also pulled 12V off it for my keyless entry system. Zero issues.

 

[joekatana]

Doesn't the stock Toyota inverter behind the glovebox have a constant 12V wire AND an ACC 12V wire?

That's how my radio is wired in. I thought they were all like that.

I also pulled 12V off it for my keyless entry system. Zero issues.

The JDM models come standard with a 24 to 12 step down converter ? I have found several different brands and models in the Euro spec 7x models but nothing oem or even dealer installed accessory

 

[googledave]

Doesn't the stock Toyota inverter behind the glovebox have a constant 12V wire AND an ACC 12V wire?

That's how my radio is wired in. I thought they were all like that.

I also pulled 12V off it for my keyless entry system. Zero issues.

The PO installed a $25 24v crappy Amazon stereo. Which also has a non functioning memory… any pics of that inverter? Doesn’t look like mine has one. Or maybe it was pulled out?

 

[googledave]

The JDM models come standard with a 24 to 12 step down converter ? I have found several different brands and models in the Euro spec 7x models but nothing oem or even dealer installed accessory

Thanks for that I may go this route if I can find a good 24v stereo. I might stop in at the local truck stop to see what they have… thanks for the help!

 

[ATL Cruiser]

The JDM models come standard with a 24 to 12 step down converter ? I have found several different brands and models in the Euro spec 7x models but nothing oem or even dealer installed accessory

That's a great question. My 1992 HZJ77 came with a converter behind the glovebox. Part number: 86206-60031 which does look like a Japanese market standard.

Here's a picture of the converter behind the glovebox on the RH side.

 

[svsisu]

Continental makes a nice HD 24 volt radio with bluetooth:

Continental Stereo with AM/FM/BT/USB - 24V - TR7423UB-OR

Discover the durable Continental Stereo with AM/FM/BT/USB for 24V systems, offering reliable sound, modern connectivity, & easy installation for industrial vehicles.

www.anchorexpress.com

And with a CD player if you still rock those:

Continental CD RADIO USB MP3 WMA 24V Boat CD7426U-OR 4103590671295 | eBay

Find many great new & used options and get the best deals for Continental CD RADIO USB MP3 WMA 24V Boat CD7426U-OR at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[googledave]

Continental makes a nice HD 24 volt radio with bluetooth:

Continental Stereo with AM/FM/BT/USB - 24V - TR7423UB-OR

Discover the durable Continental Stereo with AM/FM/BT/USB for 24V systems, offering reliable sound, modern connectivity, & easy installation for industrial vehicles.

www.anchorexpress.com

And with a CD player if you still rock those:

Continental CD RADIO USB MP3 WMA 24V Boat CD7426U-OR 4103590671295 | eBay

Find many great new & used options and get the best deals for Continental CD RADIO USB MP3 WMA 24V Boat CD7426U-OR at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Cool thanks! Bought it!

 

[googledave]

Cool thanks! Bought it!

If anyone is looking for this radio, I just received an email from anchor express that there’s a back order with unknown eta on this item…. They have no idea when the radio will come in…

 

[ATL Cruiser]

I swear that I saw a 24V Blaupunkt single DIN unit for sale either here or on the FB group.

 

[svsisu]

If anyone is looking for this radio, I just received an email from anchor express that there’s a back order with unknown eta on this item…. They have no idea when the radio will come in…

That's a bummer. There are sellers on ebay, and I can go digging for where I got mine from, but that was a really good price and why I posted that link. Just googledave the PN and I'm sure you can find it elsewhere.

 

[jblueridge]

12V radio memory

 

[LevinBR]

I wired mine directly to my first 12V battery and installed a battery equalizer (Vanner Voltmaster 60 off ebay) to keep things balanced. The equalizer is switched by a solenoid off ACC power, so it only goes to work whenever I drive and will restore whatever charge is depleted from that first battery.

The equalizer also behaves as a 24 to 12 converter when the car is on, so It provides a solution for main power to the stereo and any other 12V accessories up to 60 amps.

The Voltmaster model was a tight squeeze but I made it work, I plan on posting a thread sometime to share the install and solution.

 

[svsisu]

I wired mine directly to my first 12V battery and installed a battery equalizer (Vanner Voltmaster 60 off ebay) to keep things balanced. The equalizer is switched by a solenoid off ACC power, so it only goes to work whenever I drive and will restore whatever charge is depleted from that first battery.

The equalizer also behaves as a 24 to 12 converter when the car is on, so It provides a solution for main power to the stereo and any other 12V accessories up to 60 amps.

The Voltmaster model was a tight squeeze but I made it work, I plan on posting a thread sometime to share the install and solution.

Those are nice units.

 

[RuckitUp]

I wired mine directly to my first 12V battery and installed a battery equalizer (Vanner Voltmaster 60 off ebay) to keep things balanced. The equalizer is switched by a solenoid off ACC power, so it only goes to work whenever I drive and will restore whatever charge is depleted from that first battery.

The equalizer also behaves as a 24 to 12 converter when the car is on, so It provides a solution for main power to the stereo and any other 12V accessories up to 60 amps.

The Voltmaster model was a tight squeeze but I made it work, I plan on posting a thread sometime to share the install and solution.

Loking at installing a Vanner in my rig. Wanted to see how you ended up with yours. Any chance you can post some photos on the install incl the switched solenoid. TIA mate.

 

[LevinBR]

Loking at installing a Vanner in my rig. Wanted to see how you ended up with yours. Any chance you can post some photos on the install incl the switched solenoid. TIA mate.

Apologies for the delay! A newborn and cold weather have kept me from poking around in my garage. I posted a thread about this this morning, enjoy!:

Battery Equalizer Install

Last summer I installed a battery equalizer system on my 24V '89 BJ73. This allows 12 volt accessories to pull from the first battery in series while maintaining an equal charge on both batteries. I won't go into the science of why equal charge is important on 24V series systems, but it's worth...

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