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General Speakers popping and banging

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General Speakers popping and banging

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lakeland

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Our Ducato motorhome has started intermittently making very loud banging noises while sitting on the drive, locked up with no near it. Very scary!
The noise is coming from the speaker in the passenger door and moves on to the speaker in centre of the motorhome. Sounds so loud I can hear it in the house, it lasts a few minutes then stops. I have tried to find the fuse which is marked F49 according to my handbook but this does not disable the sound system, also tried all the other 7.5 fuses without success. (2007 model)
Anyone experienced anything like this?
 
lakeland said:
Our Ducato motorhome has started intermittently making very loud banging noises while sitting on the drive, locked up with no near it. Very scary!
The noise is coming from the speaker in the passenger door and moves on to the speaker in centre of the motorhome. Sounds so loud I can hear it in the house, it lasts a few minutes then stops. I have tried to find the fuse which is marked F49 according to my handbook but this does not disable the sound system, also tried all the other 7.5 fuses without success. (2007 model)
Anyone experienced anything like this?
Click to expand...
Have taken the radio out to solve this problem. Could a fault be traced on the radio of would it be too costly?
 
If removing the radio has stopped the popping and banging then it's highly likely that the radio is the problem. Ageing radios can develop 'leaking' components which manifest themselves in a variety of ways including the popping and banging you describe. If there are no other external interference sources which could generate radio frequency signals then changing the radio could be the only solution.
I don't think it would be worthwhile having the radio fault diagnosed - fault finding and repair will cost more than a replacement. The radio started playing up in our motorhome and we bought JVC one of fleabay for £15 with all the bells and whistles and works a treat. (Make sure if it's security protected you get the code!).
You may have to do a bit of rewiring/changing connecting blocks as the standard ISO connections don't always match up!
 
toyogran said:
If removing the radio has stopped the popping and banging then it's highly likely that the radio is the problem. Ageing radios can develop 'leaking' components which manifest themselves in a variety of ways including the popping and banging you describe. If there are no other external interference sources which could generate radio frequency signals then changing the radio could be the only solution.
I don't think it would be worthwhile having the radio fault diagnosed - fault finding and repair will cost more than a replacement. The radio started playing up in our motorhome and we bought JVC one of fleabay for £15 with all the bells and whistles and works a treat. (Make sure if it's security protected you get the code!).
You may have to do a bit of rewiring/changing connecting blocks as the standard ISO connections don't always match up!
Click to expand...

Crack it open and look for dry solder joints, corrosion and bulging or leaking electrolytic capacitors. 90% of stuff that goes to landfill in china recycling is down to simple things and these days about 70% of it is bad/counterfeit chinese electrolytics capacitors. As toyogran says you can get fantastic deals on headunit on gumtree/ebay etc. You can buy adapter cables.
 
Last edited:
Thanks for the replies guys. Radio is only six years old and works perfectly but I can't think of what other external issues that could cause this?
 
Presumably the radio receives its 12v supply from the engine battery?
If it does; take a +12v feed from the leisure battery (or other external battery source via a fuse) and leave it connected but not switched on and see if it starts banging and popping again.
If it does then the chances are it's the radio head unit that's duff.
If it doesn't bang and pop then suspect the 12v supply (or its associated circuit) that it's receiving from the starter battery.
A 6 year old radio isn't particularly "young" with plenty of time for degradation of components to be well under way and unless there are visible signs of component deterioration when you open it up a replacement sounds like a good option.
 
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