C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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74 stingray no Headlights! Please help

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Old May 14, 2018 | 10:59 AM
  #21  
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Joseph Koski
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From: Laurel DE
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Ok replaced the headlight switch over the weekend and behold! I have headlights again, now the only issue is the Speedo, Tach and center gauge lights do not work. Keeps blowing the 5A fuse.
I'm glad to have the headlights, but what could be causing the fuse to keep blowing? Do I have to remove the dash panel to check the lights? Where should I start now?
Thanks to all of the help so far, I am hoping I will soon have this issue straightened out.
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Old May 14, 2018 | 03:52 PM
  #22  
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From: Charlotte NC
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ALL of the lights you have in your dash that have a GRAY wire attached to the light sockets are on the circuit that is popping the 5 amp fuse.

The DARK GREEN wire coming off of your headlight switch is the wire that feeds power to that 5 amp fuse. SO...if you pull the headlight switch and you DO get battery power on one of the terminals that holds in your fuse. I would feel that the headlight switch is GOOD.

IF for some odd reason you have cut into the GRAY wire during dong any dash work. This will be fun to find because ALL of the light bulbs MUST be pulled out of those gray wired light sockets so you can find the area where THAT wire has been grounded to something metal.

IF you leave in just one light bulb...and try to check the gray wire for a ground. IT will show a ground because the ground traveling thought the socket into the wire and will make it like all of your sockets are bad...even if they are hanging out of there respective area that they get plugged into.

When ALL of the bulbs are out,....and you have the fuse OUT. You then can check the terminal in the fuse panel that is that GRAY wire..and see if it is grounded. IF it is...then you have a wire grounded somewhere.

DUB
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Old May 16, 2018 | 02:15 PM
  #23  
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From: Laurel DE
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Ok, I will get to that. For now I am glad to have the headlights back.
It seems like a whole mess to track this down. But if several bulbs are out will they all go out?
Maybe just need new bulbs?
Thanks
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Old May 16, 2018 | 03:44 PM
  #24  
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NO...if several bulbs go out does not mean that they all go out.

When I wrote I my past post that "when all the bulbs are out". I meant that you physically have to remove ALL of them out of the sockets...and not that it meant that they were not shining.

New light bulbs are NOT going to fix the problem of you having fuse blow. Or at least in the 30 years of me doing this. Replacing bulbs did not stop a fuse from popping.

DUB
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