I have a DEH-15 head unit.. i am installing into a 2002 ford f150 pickup.. unit turns on and picks up stations fine.. but i get no audio at all.. i checked all connections and rechecked them.. i also tried to install in a 1999 chevy s10 with same problem. any suggestions?
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Re: deh-15 no sound
The only thing i can suggest is to make sure that your positive and negative wires on the speaker wires are connected right and if they are then the radio is bad, i would try a different stereo and see if you have the same problem.
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Check your radio fuse. It is likely if you didn't disconnect your battery terminal that you may have blown a fuse.
About the speaker distortion, you may need to install filters to each speaker. They are not very expensive and can be found at just about any electronics store.
chrystler sometimes has an amplifier. the blue with a white stripe wire on the radio is for that. connect it to a black wire that was left over. ps it isn't on the wireharness on the radio. it is the one just laying inside the dash accomidating the other wires. it should turn on just fine.
this is a problem that is caused by the ribbon cable that connects the two faces going bad - you can find repair kits for this unit on ebay.. just search DEH-P840MP and you will find "ribbon kits" or repair kits. They are usually about 15 dollars.
Very common with pioneers. their is a ground loop fuse-located inside the head unit, that has to be repaired at the factory. Or, the best way-just like you said, is to ground the rca's, solder a thin wire to each rca, easiest and cheapest way. I had it happen to me with a 4800.
Pioneer have factory set your DEH-P690UB to 0.2Mhz steps to match the American FM frequency allocations.
The fix is not casual as it requires complete disassembly of the head unit and repositioning of two surface mount resistors.
This will void any warrantee and unless you're good at microscopic soldering could also ruin the set.
I did however void my 2 year warrantee yesterday partly out of frustration and because I have the right SMT tools at work.
Now my tuner CPU thinks it's in the Austrailian/Asian model DEH-P7950UB and is also compatible with UK stations.
A previously hidden menu is also available where I can set either 0.1 or 0.05Mhz stepping for FM and 9 or 10KHz for AM BSM scanning.
The rotary control now steps in 0.05's instead of odd 0.2's on FM
Hope this helps.