I installed my radio and to cross the hot wire and the aux wire to get the radio to power up. I have installed many radios in the past but never ran into this problem. If i keep the wires crossed obviously the radio wont turn off with the ignition.
Sound like you have a bad fuse in your aux wire check to make sure your aux wire has power when ignition is on if not check your fuses in your car start with the radio but it could be drawing from another fuse like cigar lighter good luck.....
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If you have a multimeter or test light, try to find a wire that still has 12v when the key is off. Connect that wire to the yellow wire of the radio. The yellow wire has to have constant voltage going to it to maintain the memory.
if the unit only looses radio station presets then there is a defect with the unit. if the unit looses all its memory, (clock, stations, settings) then there is an issues with your aux power. basically you have the main power connect properly so it turns on the unit while the cars is on but the aux power keeps those settings.
Pull the radio back out. I bet you hooked up both power wires (red and orange or yellow) to the ignition on hot wire. Orange or yellow depending on the radio usualy goes to the ignition on hot wire and red to a constant hot wire. Check the radio wiring diagram or list. One of the power wires has to go to a full time power source. check the wires with a circuit tester with the key off till you find the constant hot wire (battery power)
Your receiver does not have an AUX input, so you will need an adapter. Should be easy enough to find, there are many to choose from. Just go to any electronics store. What wires you'll need to connect will depend on what type of AUX accessory you buy. It could plug into the lighter, it may need to be wired.
You could also use an FM modulator. They work well enough in my experience(I'd stay away from Belkin though). This would probably be the cheapest solution and you would still use the AUX inputs and would not have to install/uninstall anything, just plug and play and run your antenna. You may want to wire the power to the 12v power wire on the back of your stereo if the FM modulator needs to be plugged into the lighter, if not then don't bother and just use the lighter to power the satellite radio receiver. :-)
More than likely you got some wires crossed. The Aux or Accessory(usually the red wire, stays hot all the time so the radio can save your presets) the yellow wire is usually the main power. I would go back through your wiring and make sure no wires are crossed. I'm going on my experiences with installing radios and other equipment. hope this is helpful, if not sorry.
did you check to make sure your vehicle didnt come with a factory amp, if it has one is it turning on? or did you remember to disconnect the negative battery cable while installing your radio, i know thats a dumb question, once i was installing a pioneer a barely crossed a couple wires and fried the radio, the radio itself worked fine and all the features etc, but it never did play sound again. i always disconnect the power now!!
First off who installed the radio?
If you or a friend did you ned to make sure that 12+ always is supplied to the radio and is hooked to the appropriate wire on the radio. If it does have 12+ always and it is hooked up correctly a replacement of the radio is in order, however I bet the wireing to the radio is crossed or the radio itself is uncorrectly installed.
The reason is the accessory and 12+ always wire has been crossed or was never there to begin with.
No ur radio is fine to fit the wiring harness into ur dodge the wiring has been crossed so it wont work, if u go 2 the Kenwood US site and down load the KDC MP 228 manual it has a good wiring dirgram and with a bit of work u can work out what goes where :0 Hope this helps