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 Post subject: Cigarette Lighter
PostPosted:Thu Sep 29, 2016 2:04 pm 
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Big Block

Joined:Sun Jul 31, 2016 4:57 pm
Posts:108
Car Details:1985 Chevrolet Camaro 3rd Gen
Anyone have any idea why the cigarette lighter keeps fusing when you plug a sat nav or dash cam into it?


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 Post subject: Re: Cigarette Lighter
PostPosted:Thu Sep 29, 2016 4:42 pm 
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Big Block
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Joined:Tue Feb 23, 2010 12:40 pm
Posts:3245
Car Details:'79 Camaro, 350 V8
Location:South Bucks
Likely the fuse isn't designed for the higher draw? Satnav would pull at least 2amps (if you can have a look at the back of the satnav, it should give some info like volts and also the amps it uses). What size is the fuse that's being used? It maybe 5 and the satnav could be pulling 2-4, but because the wiring is quite old, there's likely more resistance in it (corroded or frayed wires) causing the draw to be higher.
Other thing it could be is that the wire is touching ground somewhere near the connection to the lighter and by pluggin something in, it makes contact to ground.

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 Post subject: Re: Cigarette Lighter
PostPosted:Sat Oct 01, 2016 11:59 am 
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Big Block

Joined:Sun Jul 31, 2016 4:57 pm
Posts:108
Car Details:1985 Chevrolet Camaro 3rd Gen
Quote:
Likely the fuse isn't designed for the higher draw? Satnav would pull at least 2amps (if you can have a look at the back of the satnav, it should give some info like volts and also the amps it uses). What size is the fuse that's being used? It maybe 5 and the satnav could be pulling 2-4, but because the wiring is quite old, there's likely more resistance in it (corroded or frayed wires) causing the draw to be higher.
Other thing it could be is that the wire is touching ground somewhere near the connection to the lighter and by pluggin something in, it makes contact to ground.
The fuse in it is a 10, not sure if that's the right one but it's what was in there.

I've since seen some people recommend altering the shape of the adapter as that could cause problems, not sure how. Others have said they replaced the whole socket which might be an option, on the roads up here in the Yorkshire Dales/Cumbria I like to have proof it's the other idiots on the wrong side of the road should a bump happen


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 Post subject: Re: Cigarette Lighter
PostPosted:Sat Oct 01, 2016 1:17 pm 
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Big Block
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Joined:Fri Mar 19, 2010 1:35 am
Posts:2566
Car Details:79' camaro road & track day toy. 383 stroker, 5 speed TKO trans, lots of suspension stuff, 13" Vette brakes, 18" wheels.
Location:Luton
Sounds like something shorting it when you use certain connectors for sat nav etc.
I'd check out the shape of the flat positive connector in the socket quite carefully, it may have become crushed or pushed flat so certain things cause it to touch the inside edge when used..

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 Post subject: Re: Cigarette Lighter
PostPosted:Tue Oct 11, 2016 2:36 pm 
Offline
Big Block

Joined:Sun Jul 31, 2016 4:57 pm
Posts:108
Car Details:1985 Chevrolet Camaro 3rd Gen
I had a look at the possibility of replacing the entire unit, which idiot decided there should be no play in the wiring in the dash???


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 Post subject: Re: Cigarette Lighter
PostPosted:Sat Oct 22, 2016 4:52 pm 
Offline
Big Block

Joined:Sun Jul 31, 2016 4:57 pm
Posts:108
Car Details:1985 Chevrolet Camaro 3rd Gen
Found a solution, dremmel the end of the input plug so there's no 'bell end' (so to speak, excuse the crude analogy) It seems if any piece sticks out it makes the connection knock out the fuse for some reason, I did find a diagram somewhere but I lost the link. Used a sat nav all the way up the M6 to Tebay and it worked like a charm


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