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Author Topic: I'm stumped!!  (Read 5608 times)

Offline 1978 K20

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I'm stumped!!
« on: May 16, 2011, 01:45:14 am »
So here is the deal.

I've got a 78 K20, The right brake light is having problems. First thing I did is changed the bulb (twice) and still nothing. The weird part is that there is power to the socket. It is a 1157, so it is dual filament. When only the tail light is only on there is power to one side, and when I press the brake pedal there is power to both sides (like there should be.) BUT THE LIGHT STILL ISNT WORKING!

It wasn't working last night, yet it worked when I left work, and didnt work when I backed into my driveway (2ish miles away.)

ANY ideas are welcome. Thanks!

-John
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1978 K20 "Custom Deluxe"
Dana 44 (locked), SBC 350, SM465, NP205, 14 Bolt
Lifted Six (ish) inches, Sitting on 35x12.5x16.5 BFG A/T
Warn 8274 Winch
Dual whip CB
In the works: Ladder bars, MSD, and other goodies

Offline Irish_Alley

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Re: I'm stumped!!
« Reply #1 on: May 16, 2011, 10:02:57 am »
bad ground
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline 1978 K20

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Re: I'm stumped!!
« Reply #2 on: May 16, 2011, 10:36:30 am »
But where is a ground in that circut?
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1978 K20 "Custom Deluxe"
Dana 44 (locked), SBC 350, SM465, NP205, 14 Bolt
Lifted Six (ish) inches, Sitting on 35x12.5x16.5 BFG A/T
Warn 8274 Winch
Dual whip CB
In the works: Ladder bars, MSD, and other goodies

Offline VileZambonie

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Re: I'm stumped!!
« Reply #3 on: May 16, 2011, 05:02:19 pm »
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline VileZambonie

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Re: I'm stumped!!
« Reply #4 on: May 16, 2011, 05:02:38 pm »
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,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Irish_Alley

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Re: I'm stumped!!
« Reply #5 on: May 16, 2011, 09:28:13 pm »
could also be a bad socket
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline 1978 K20

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Re: I'm stumped!!
« Reply #6 on: May 17, 2011, 12:18:46 pm »
Unless I have gotten two bad sockets in a row, I am ruling out a bad socket. I think my best bet is going to be to shoot wiring and try to find a bad ground.
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1978 K20 "Custom Deluxe"
Dana 44 (locked), SBC 350, SM465, NP205, 14 Bolt
Lifted Six (ish) inches, Sitting on 35x12.5x16.5 BFG A/T
Warn 8274 Winch
Dual whip CB
In the works: Ladder bars, MSD, and other goodies

Offline Irish_Alley

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  • Family is not an important thing. It's everything.
Re: I'm stumped!!
« Reply #7 on: May 17, 2011, 06:38:46 pm »
did you change the bulbs and sockets or just the bulbs
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline VileZambonie

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Re: I'm stumped!!
« Reply #8 on: May 17, 2011, 06:57:25 pm »
If you think its a bad ground runa jumper wire from the the housing to a good ground and see if it works.
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,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline fitz

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Re: I'm stumped!!
« Reply #9 on: May 17, 2011, 08:19:58 pm »
Quote from: VileZambonie on May 17, 2011, 06:57:25 pm
If you think its a bad ground runa jumper wire from the the housing to a good ground and see if it works.

You can count on Vile for a solid answer. I would have said to run the jumpers into the left brake light and call it a day.
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