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front indicator problem can you help?



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photoman1963

Club Member

Mon 19 Mar 18 15:35

front indicator problem can you help?


on my C1 1962 I my left hand indicators work front and back fine, but right side back flashes and both front indicators flash dimly?? tried cleaning fitting/new bulb.. please assist guys.. its driving me mad!

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kentvette

Club Member

Mon 19 Mar 18 17:43

Re: front indicator problem can you help?


I can't pretend to be an expert on electrics, especially on a '62. But, it sounds like a dodgy "earth"? Probably worth going over all the connections in the indicator wiring circuit and cleaning them all up?


--------------------
Stephen J Irons
CCCUK Lifetime Member
Corvette Club France
Corvettes of Southern California
NCM Family Member
Stephen & June's Web Site
Red Corvettes Have More Fun!

Apple IS Genisys!
The "Born-Again Greenies" are killing the planet! It's time to wake up and smell the rain-forest burning!

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62vette

Addict

Mon 19 Mar 18 20:51


check the indicator mechanism on the coloum aswell

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5 USA

Club Member

Tue 20 Mar 18 19:03

Re: front indicator problem can you help?


Yes, as Kentvette says this is likely to be an earthing fault.

The first places I'd look are close to lamps which are flashing dimly, especially anything with a "twin filament" bulb.

If you think about it, a twin filament bulb has 3 contacts. For instance a twin filament tail lamp has,
* live for 21 watt filament
* live for 5 watt filament
* ground

So if the bulb's ground contact gets disconnected from the chassis (particularly likely on a fibreglass car!) the current will try to escape through the other filament and off around your wiring until it finds an earth elsewhere. It's because the filaments act as resistors in series with each other that the lamps only illuminate dimly. The same can happen with multiple single filament bulbs depending on the particular car's wiring.

A voltmeter can help you find the fault because if you test at the "live" side of a bulb that's flashing dimly and see a full 12v you know the problem's in the other direction. Similarly if you see low voltage on both sides of a bulb you know you're "somewhere in the middle" and not at the site of the fault.

Good luck!


--------------------
The Stingray has landed!

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roscobbc

Committee Member

Tue 20 Mar 18 23:31

Re: front indicator problem can you help?


A nice simple and logical explanation - thanks (of behalf of the potentially confused)


--------------------
CCCUK Chairman & Editor, Vette News
'68 coupe - 4 speed - 3.08 - 489 cu in - 570 bhp @ 5850 rpm - 606 ft/lbs torque (821 Newton Metres) @ 3850 rpm
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kentvette

Club Member

Wed 21 Mar 18 10:10

Re: front indicator problem can you help?


Agree Ross, a great explanation! I'm sure there are many like me who know what happens, but not why! Rolling Eyes Very Happy

Thanks!


--------------------
Stephen J Irons
CCCUK Lifetime Member
Corvette Club France
Corvettes of Southern California
NCM Family Member
Stephen & June's Web Site
Red Corvettes Have More Fun!

Apple IS Genisys!
The "Born-Again Greenies" are killing the planet! It's time to wake up and smell the rain-forest burning!

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photoman1963

Club Member

Sat 24 Mar 18 23:54

Re: front indicator problem can you help?


many thanks

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Yellowshark

Club Member

Sun 25 Mar 18 15:31


Another thing to look out for is that the earth circuits often join together in places via a connector. These connectors corrode internally and so whilst your particular earth circuit may be physically connected at the light fitting and likewise at the earthing point, the corrosion will break the circuit en route. A good jewellers file will help to clean the internal connections within the connector "box".

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