What's This Noise?

Folkranger

Folkranger

Joined
May 2, 2014
Posts
2,451
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Location
Washington
Funster No
31,281
MH
Hymer B 584DL
Exp
17 years + 35 tugging
Pitched up on site and have had this noise going for some hours. It's a regular fast continous squeek, squeek, squeek, squeek. It sounds like it's coming from around the heater area but is loudest under the van. It is running at about 200 beats per minute. It sounds like the farmer's field sprinkler, at first I thought it was, but it's coming from my van.

I've turned off mains, 12v, pump, gas and fridge. No difference
I've run taps, drained the heater, run the gas cooker, turned off the victron charger and retracted the Goldscmitt legs. Nothing changes!
I even wonder if there could be something underground, like a pump, but short of moving the van. I doubt it.

I realy don't want to go to bed tonight with this unsorted.
 
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Toilet fan?
Boiler?
fridges fans?
charger cooling fan?

if it is a beeb/chirp not a squeak, I had similar years ago when my towing electrics doofa canbus thingy was giving a constant chirp. It was wired into a waterproof box that distracted where the sound was from.
 
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Landy Andy said:
Toilet fan?
Boiler?
fridges fans?
charger cooling fan?
Click to expand...
But I've had all the electric off and the noise continues. Just thought, the only electric that is on is the starter battery. But what's on that that works near the back underside of the vehicle. Fiat.
 
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Landy Andy said:
Toilet fan?
Boiler?
fridges fans?
charger cooling fan?

if it is a beeb/chirp not a squeak, I had similar years ago when my towing electrics doofa canbus thingy was giving a constant chirp. It was wired into a waterproof box that distracted where the sound was from.
Click to expand...
I'll accept chirp. A bit like someone hand pumping a tyre up but on speed.
 
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intokenny said:
As Landy Andy said, i had the same thing on my old van. It was the wiring from the tow bar just inside the light cluster, where you change the bulb's inside.
Click to expand...
Would this happen even though I don't have a tow bar?
 
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If I had a pressurised water system I would think the noise sounds like the punp continuing to oscillate on off. But mine are microswitched taps and I've tried with the electric off.
 
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Folkranger said:
But I've had all the electric off and the noise continues. Just thought, the only electric that is on is the starter battery. But what's on that that works near the back underside of the vehicle. Fiat.
Click to expand...
The only way mine would stop was to pull the connection from the tow bar where it was joined to the wiring behing the rear light cluster. I was sat in my flat when a neighbour had walked by & heard it constantly beeping. No electrics were switched on. Was beeping whether i was driving or not.

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You could try disconnecting the vehicle battery and if no change disconnect the leisure battery.
We have a small inverter and when switched on with no load it eventually makes a fast ticking noise.
 
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intokenny said:
Could it be a relay of some sort in the back?
Click to expand...
That sounds likely, but it can only be driven by the starter battery. The noise is about 8ft from the back, nearside and loudest underneath the van. All I can see at that position is the waste water tank, unless there is something attached to the chassis.
It's pitch black now so all I can do is have a beer or two and hope it's gone by the morning.
 
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Folkranger said:
That sounds likely, but it can only be driven by the starter battery. The noise is about 8ft from the back, nearside and loudest underneath the van. All I can see at that position is the waste water tank, unless there is something attached to the chassis.
It's pitch black now so all I can do is have a beer or two and hope it's gone by the morning.
Click to expand...
Sounds about the right piston for toilet fan, if a Therford one straight under the loo about 10“ from outside wall, if a SOG about 6" in front of the loo under a small floor hatch.
 
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Lenny HB said:
Sounds about the right piston for toilet fan, if a Therford one straight under the loo about 10“ from outside wall, if a SOG about 6" in front of the loo under a small floor hatch.
Click to expand...
Opposite side to the loo, also that wouldn't work with the mains and 12v turned off. But here's the rub........ My toilet fan sounds like a jet engine.

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Folkranger said:
Opposite side to the loo, also that wouldn't work with the mains and 12v turned off. But here's the rub........ My toilet fan sounds like a jet engine.
Click to expand...
Yer, I forgot about all power off.
You have the Thetford one, youcan only just hear a SOG.
 
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Fan in solar controller?
With the power off and no solar the output will still be connected to the battery where it takes power for the electronics and fan if it has one.

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Another thought one of the fans in the Truma Combi, the Combi is still powered when the 12v is off via a 10amp fuse in fuse bank beside the Elektroblock to the left of the EBL in mine looking at the front.
 
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