In car charger..Bizarre!

[Pagen]

Hi all can anyone help ? The plug into the cigarette lighter socket charger that we use for our sat nav no longer works. The led on the plug in charger illuminates and also if I put the cig lighter in it als works. However despite all usb leads being checked and indeed trying other plug in chargers which all work fine in other vehicles they just don’t charge from this one??? Had same charger in it working fine until a few days ago???

 

[Stealaway]

Have you changed the wiring / wrong polarity now? Checked fuse in usb adapter?

 

[TheBig1]

The chip inside the 12v to 5v usb has burnt out. This happens a lot, it appears to work, but cannot provide power to charge anything

 

[Vipar]

As above

 

[Pagen]

I have three of these chargers one being brand new. All work fine in other vehicles. As do the usb leads. Nothing has changed as far as I am aware ..went in for mot then next time I used it the problem was happening???

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[Vipar]

For the sake of a couple of £ I would changed the cig socket

 

[Pagen]

Sorry guys Big 1 and Vipar for my lack of understanding. Do you mean there is some sort of fuse to do with the lighter assembly itself that is not allowing it to charge whereas it still lights the led on the plug in chargers and also heats a fag lighter red hot ? And if so is changing the lighter assembly an easy job to do?

 

[Jev88]

Can you open your satnav plug? I had a TV and when i opened the plug (one screw) could see that one wire was barely connected by the tiniest bit of solder. New Plug, job done.

 

[Pagen]

Appreciate what your saying re sat nav but it isn’t just that that isn’t charging it’s my iPhone too ! I am totally puzzled to be honest

 

[Vipar]

If all leads work in another socket. Then by normal reasoning it must be the socket that’s why I recommend that you change it.

Plug in the sat nav lead and see what voltage it is supplying to the sat nav

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[Pagen]

Hi Vipar how do I see what voltage it’s supplying to the sat nav ? I understand your logic in changing the socket but just don’t understand why cigarette lighter in it works fine so obviously power there ?

 

[Lenny HB]

Try changing the fuse that feeds the socket they can partly blow so still look OK but have gone high resistance.

 

[autorouter]

Try changing the fuse that feeds the socket they can partly blow so still look OK but have gone high resistance.

If there is a bad connection somewhere in the socket wiring - loose terminal, partly broken wire, break inside the insulation, corroded fuse or as suggested partly blown fuse, this can cause a high resistance. Measuring the socket voltage with a multimeter will show a good working voltage, but as soon as you draw any amps from the socket, its voltage will fall, and any connected device might not function.

Enough voltage to light an LED, maybe, but not enough to power the device fully.

 

[Pagen]

Hi all and thank you very much yet again for your suggestions. In the end cleaned the lighter socket both side and bottom contacts plus replaced the 15 a fuse even though it seemed ok. Also changed usb lead for phone and all works properly again have to say Motorhomefun is such brilliant place to reassure and advise all things Mo Ho and beyond! Ta Paul

 

[Ingwe]

Hi all and thank you very much yet again for your suggestions. In the end cleaned the lighter socket both side and bottom contacts plus replaced the 15 a fuse even though it seemed ok. Also changed usb lead for phone and all works properly again have to say Motorhomefun is such brilliant place to reassure and advise all things Mo Ho and beyond! Ta Paul

Some differential diagnosis would help us understand which of your remedial steps, sorted the problem or problems.
Was it the contacts? Was it the fuse? Was it the USB?
Anyway, pleased you sorted it

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[Pagen]

Ref Ingwe differential diagnosis I think retrospectively that the usb lead I charge the phone with was the culprit. The in car plug in charger has two ports one supplies the Tom Tom and other the phone. The Tom Tom normally switches itself on as soon as powered up ie ignition on and start up. However.....I believe now the tom
Tom was as flat as a witches tit as I have been shielding since Noah built the Arc! and vehicle only occasionally started up in drive . My logic at the time was oower missus tom Tom AND phone not receiving charge but now I believe that not to be the case and just the phone lead was naff. The sat nav was just flat and waiting to build up its charge. Thanks again for all advice