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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

Speaker grounding issue

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Old Aug 27, 2005 | 10:56 AM
  #1  
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Speaker grounding issue

I have this Sony CD/stereo and a pair of Rockford Fosgate 6x9 speakes....one in each door (they are metal - it is a 1967) and it has been working fine for nearly a year....about a week ago, the stereo starts giving me an error message about a speaker being wired wrong and cuts the driver's side one off to save the amp.....I searched everywhere for loose connections and/or frayed insulation and found none.....If i remove the speaker from the door, It works fine.....but once the "casing" of the speaker makes contact with the door, I get a buzz and the amp cuts out again. (I have examined the speaker and I can see nowhere that the connectors make contact with the casing)

What the Hell is going on here????!?!?!?! There is nothing else electrical in the door and if something was grounding to the body it should effect BOTH speakers.....PLUS, it has worked perfectly fine for 11 months.

Any clues?
 
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Old Aug 27, 2005 | 11:46 AM
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Check your speaker wires. Sounds like one could have damaged insulation, causing a short to ground.
 
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Old Aug 27, 2005 | 02:16 PM
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I agree, especially if you ran it through an ungrommeted hole. Do not discount mice damage.
 
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Old Aug 27, 2005 | 02:20 PM
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Checked everything....no frays or splits anywhere.....and it has begun to work again. We will see for how long, I guess. The guys at Best Buy (what do they know?) suggested it may be a bad voice coil in the speaker....apparently they have seen this with Rockford Fosgate speakers before.
 
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Old Aug 28, 2005 | 11:04 AM
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Doors of these old trucks aren't the most friendly place to speakers.
they tend to get slammed hard, and it isnt the most waterproof place on the truck.
 
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Old Aug 28, 2005 | 11:35 AM
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Originally Posted by Fordzlla
Doors of these old trucks aren't the most friendly place to speakers.
they tend to get slammed hard, and it isnt the most waterproof place on the truck.
Yeah....but someone (previous owner...not ME) had already cut the holes in the doors, so I figured I'd use them....the slamming of the door probably does have some effect....plus the fact that they are at "shoe level" But, at the moment they are still working, so I will cross my fingers! At least it's not an engine issue this time!
 
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Old Aug 28, 2005 | 12:25 PM
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Next time it happens, swap the speakers - see if the problem follows the speaker or stays in the same door. If it follows - bad speaker, if not, wiring problem
 
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Old Aug 28, 2005 | 01:49 PM
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Maybe the wires are backwards so the grounding from the door is conflicting with the hot feed on the speaker.
 
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Old Aug 29, 2005 | 07:01 AM
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Sounds like wires too me also, and while removing the speaker you just pinched the break together again. Just run a new wire as its a cheap and easy fix. Are you sure its not grounding out on the inside door panel. It might have been close and a door slam or nudge of a foot caused it to ground. You might also try some of the that backing stuff (can't think of the name) for your speakers.
 
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Old Aug 29, 2005 | 07:54 AM
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You guys are obviously NOT reading the posts....I HAVE checked the wiring from the Stereo ALL THE WAY to the speaker....NO Breaks, Frays twists, etc...the wire is in nearly perfect condition......the speaker would perform fine, connected to the wires and removed from the door....the moment the metal "casing" of the speaker came in contact with the door the problem occured.....since the speaker is at shoe level, i have a feeling that the voice coils may have received a kick or something that broke something inside....but at the moment it is working fine.
 
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Old Aug 29, 2005 | 12:11 PM
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I used to go through a set of speakers a year. Good ones, cheap ones, didnt matter. Between slamming the doors and water running inside the door, they just didnt last
last set I got was a pair of Sony marine. They sound good and have lasted five years so far.
 
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Old Aug 29, 2005 | 06:32 PM
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It could also be the terminals on the speaker are sometimes touching the door and shorting out. Try wrapping it with electrical tape and see if it happens again.
 
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