Question about Pioneer AVHP3200BT Car Video Player

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The radio will only come on when the constant and switchable are both hooked together and when the are hooked up like they are suppose to the radio will not come on

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This means that one of them has no battery feed on it.

Check it with a multimeter or a test lamp

Posted on Jan 04, 2011


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Pioneer DEH-3300 UB

Apparently, you have no power at the 12 volt battery/memory wire at the radio harness of the vehicle. This wire is white with blue in color.
Also, based upon your description, you have connected the battery/memory wire and the accessory wire of the radio to the 12 volt accessory (switched) wire of the vehicle. This wire is white with red in color.
Check the radio/ stereo fuse of the car. You may have blown the fuse during your installation.
You have no memory at the radio because when you turn off the key, you lose all power to the radio.
Also, I mentioned the wire colors just in case you used an aftermarket radio wiring harness. Make sure that the yellow from the Pioneer unit is going to the battery power source and, the red of the Pioneer is going to the switched power source.

Sep 12, 2012 | Pioneer Car Audio & Video

1 Answer

Where do i connect for 12 v acc pwr and 12 v constant pwr. I'm connecting a rear seat dvd system

connect it to the fuse box using spades available from Radio Shack for a nominal cost.
The 12 V ACC is switchable with the ignition, and the 12 V constant is on all of the time, like from a cigarette lighter, so that memory is not lost.

Feb 13, 2011 | 2006 Cadillac Escalade

1 Answer

No headlights,speedometer,rpm,windows,cruise,since i hooked up after market radio,have sinced unhooked the radio,but still notting works

either a fuse or a damaged BCM ,you have to be careful here as sometimes if the feed used is the supply for the auto volume or panel lights you can and will get this problem ,which is why when i fit one i use my own 12v switchable supply from ignition switch that i install

Dec 21, 2010 | Honda Accord Cars & Trucks

1 Answer

Yellow wire from battery to radio no power?

Hi Excavator,

Normally both Red and Yellow on the radio need +12VDC (with Black Grounded).

One is supposed to be switched, the other constant (for clock, memory, etc). I've been hooking 'em both to constant power for so long I forgot which is which

Best regards,

Mike 794398b.gif

Aug 14, 2010 | Car Audio & Video

1 Answer

My car radio changes back to 12:oo every time I start the car, general fuses seem fine. Just got a new starter. Are there back up fuses?

Hello, my name is Ben. Most likely someone has hooked up your radio wrong. It is supposed to be powered by a "constant hot" power source. It sounds like yours is hooked up to a power source that only comes on when the key is turned on. You will need to change where the radio gets power from to a constant hot wire.

Jun 13, 2010 | 2002 Pontiac Sunfire

1 Answer


red is the 12 volt power line. yellow is the memory line(constant 12 volts) . small red wire is the switchable 12 volt line that only has 12 volts when keys in ignition

Nov 17, 2009 | Car Audio & Video

2 Answers

Hi i turn my alpine on and i have 2 retune the radio stations i store them but when i get back in my car i have 2 start 2 retune any idears

Probably you dont have the constant pos (+) wire hooked up to hot (+) wire and only to a source that is switched. Switched means every time your key is removed from ignition switch the positive current from that source will also power down. There are two positive leads from the unit, 1 always hot and the other needs to be switchable. The constant hot (usually yellow) powers the memory for your settings. Just like your television set, once you pull the cord off the socket everything returns to default setting.

Oct 20, 2009 | Alpine CDA-9857 CD Player

2 Answers

Phase linear uv8020

you probably have constant power running the radio. do you have constant and ignition wires from the radio hooked up or did you twist the yellow and red wires together? if this installation was done correctly than you the unit should power off when you turn the ignition off.

Mar 29, 2009 | Audiovox UV8020

1 Answer

Wiring Pioneer DEH-225 to 1996 Kia Sportage

the difference between constant and switched 12V is the constant is usually for the clock and memory. it draws precious little current. the switched would be for the radio and amp once the car is turned on. You can use tape but either a wire nut (not the pink ones) or a crimp on cap would be better than using tape.

Feb 09, 2009 | Pioneer DEH-225 CD Changer

1 Answer

Remote wire

You have the REMOTE wire hooked to a constant +12V source. The remote wire is supposed to correspond to the ACCY wire to the vehicle, usually through an aftermarket Audio DECK. If it is reaming on when turning the key OFF the wire you currently have it spliced to is a CONSTANT +12V , which is connected directly to the battery. If you do not have a aftermarket Deck, hook the remote wire to the ACCY wire conecting to the factory radio.

Jun 19, 2008 | Car Audio & Video

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