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Rick
Dodge Dakota
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6/03/2009
22:16:47
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 Subject: Front speakers in and out
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Message:
99 dakota club cab
I replaced the stock speakers with same sized aftermarket speakers (Polks or something).
I had a Jensen deck for the past few years. It had problems with the antenna and with playing cds, but otherwise played well.
I just installed a Pioneer DEH310 and the front speakers aren't working properly. Basically they don't consistently play. At first they didn't play at all. The deck itself is fine and the wiring to the rear speakers are fine, because when I switched the front speaker source wires with the rear speakers, the rear speakers played. When I plugged the rear speaker source wires into the front speakers, they did NOT play. This would suggest some problem with the stock wires or with the wiring harness.
The thing is, sometimes the front speakers kick on. There will be a loud electronic POP, then they start playing.
What in the world is going on? Is there a fuse or a lose connection somewhere? If I just run new speaker wires to the front speakers, will it all be good?
Thanks.
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Jimmy9190
Dodge Dakota
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6/05/2009
00:35:01
|  RE: Front speakers in and out
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You probably have a speaker wire shorted to ground somewhere between the speaker and radio. The new Pioneer unit has a lot more internal power than the Jensen, and it has different type outputs that are much more sensitive to shorted speaker leads. It shuts down when a speaker wire is shorted to ground to protect the outputs of the radio from being damaged. The shorted wire is probably intermittently touching metal, and when it is bumped loose and not touching metal that's when the pop sound is heard and the radio starts playing.
You should start by removing the door panels and being sure the speaker terminals and the wires behind the speaker are not touching metal in the speaker location. You can put duct tape around the inside of the speaker hole to insulate it. If that's not it, use an ohm meter set for continuity to ground to check the speaker leads to find out if they are shorted to ground. Do that with the radio disconnected. Then either find the shorted or pinched wire and fix it, or you can just run new wires. If that's not it, one of the speakers in front has a shorted voice coil and must be replaced.
The Mosfet outputs on the Pioneer radio will not work when there is a short in the speaker wires.
Jimmy
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?
Dodge Dakota
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6/05/2009
09:05:37
| RE: Front speakers in and out
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Message:
No Jimmy - Chrysler used very poor wiring harnesses ..
The wires will not take very much bending
back and forth ( door open and close )
also some of their connectors were a bit shy
on conductivity .
Rick - just run new wire , that will be the best fix..
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Rick
Dodge Dakota
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6/05/2009
23:13:12
| RE: Front speakers in and out
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I'm intrigued by Jimmy's response because his idea explains why both speakers cut out together instead of one at a time. It also fits with two pieces of information I left out of the original question because I didn't want to sound crazy.
First, I've noticed that whether the front speakers play or not roughly correlates with the time of day. Crazy, I know. But I figure as the rubber and plastic insulation bits warm up over the day, the cord of wires can shift position, going from ok to shorted.
Second, I was driving home today and the front speakers were out. Then I hit a bump and they came on.
Regardless, it seems the fix is the same.
Thanks both for replying.
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Jimmy9190
Dodge Dakota
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6/05/2009
23:51:58
| RE: Front speakers in and out
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You need to check the speaker wires and see if they are shorted out to ground. It could be possible you have a bad connection in the door jamb boot, but it's not that likely. Dodge uses a decent gauge of wire to run from the deck or amp location to the door speaker locations. In over 16 years of installing car audio, I only saw a bad door jamb boot molex connector one time, on a Chrysler minivan. If you have a shorted speaker wire, the easiest (and fastest) solution really would be to run new wires instead of spending all day trying to find where it is shorted so you can fix the short.
You didn't mention whether you have the OE Infinity system with the factory amplifier. If so, you might have a problem with the OE amp, if it is still wired into the system. If not, and the speaker wires are not shorted, you could have an internal problem with the Pioneer unit. The fact that the speakers cut out when the unit is warm could point to an internal problem in the Pioneer deck or the OE amp. I have seen a couple posts in the past where the front or rear channels of the OE amp shut down and quit working altogether. You may need to get the truck to a good car audio shop to have the deck and amp (if you have one) bench tested. Or if the Pioneer deck is new, maybe the store where you bought it will exchange it for a new one if it is defective.
Speakers won't shut down due to heat, unless the heat is from too much power and/or sustained distortion across the voice coil, and even in that situation the voice coil will open and the speaker won't play at all. At that point, you must replace the speaker.
Jimmy
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