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Home » Public Forums » GMCnet » Parking/clearance lights do not turn on
Parking/clearance lights do not turn on [message #248626] Mon, 28 April 2014 07:59 Go to next message
batman is currently offline  batman   United States
Messages: 100
Registered: January 2004
Location: Benbrook, TX
Karma: -3
Senior Member
Need some help diagnosing an electrical problem.

The parking, clearance and dash lights will NOT turn on. Neither front or rear lights turn on.

Blinkers work. Headlights work.

Did not find any burned out fuses at the under dash fuse box.

I've never been very good at troubleshooting electrical problems, so any suggestions would be greatly appreciated.

eugene
benbrook, tx
77 Eleganza II, Howell EFI + EBL
http://gmc.backyardwildlife.com

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Re: [GMCnet] Parking/clearance lights do not turn on [message #248628 is a reply to message #248626] Mon, 28 April 2014 08:10 Go to previous messageGo to next message
emerystora is currently offline  emerystora   United States
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Registered: January 2004
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Senior Member
Sometimes fuses look good but are not functioning properly. For example it could be burned just under the cap at one end where it won't show.
The best way to test them is with a 12 volt test light. Ground the wire and then touch the light probe to each side of the fuse. If its bad it won't light at one end.

Have you replaced the radio lately? There is a gray wire that went to the lights on the original wire that will test as a ground and some have used it to ground their radio. That gray wire leads to the headlight switch and if grounded will cause your lights to be off.

Emery Stora
77 Kingsley
Frederick, CO

On Apr 28, 2014, at 6:59 AM, eugene <emazz@swbell.net> wrote:

>
>
> Need some help diagnosing an electrical problem.
>
> The parking, clearance and dash lights will NOT turn on. Neither front or rear lights turn on.
>
> Blinkers work. Headlights work.
>
> Did not find any burned out fuses at the under dash fuse box.
>
> I've never been very good at troubleshooting electrical problems, so any suggestions would be greatly appreciated.
> --
> eugene
> benbrook, tx
> 77 Eleganza II
> http://gmc.backyardwildlife.com
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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Re: Parking/clearance lights do not turn on [message #248638 is a reply to message #248626] Mon, 28 April 2014 09:26 Go to previous messageGo to next message
A Hamilto is currently offline  A Hamilto   United States
Messages: 4508
Registered: April 2011
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Senior Member
batman wrote on Mon, 28 April 2014 07:59

Need some help diagnosing an electrical problem.

The parking, clearance and dash lights will NOT turn on. Neither front or rear lights turn on.

Blinkers work. Headlights work.

Did not find any burned out fuses at the under dash fuse box.

I've never been very good at troubleshooting electrical problems, so any suggestions would be greatly appreciated.
If it is not a fuse, get this drawing to help you figure out what color wires you are chasing down (looking for breaks and insulation worn off).

http://www.bdub.net/wirediagrams/77-78-chassis-electrolevel-I.pdf

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Re: [GMCnet] Parking/clearance lights do not turn on [message #248666 is a reply to message #248628] Mon, 28 April 2014 12:08 Go to previous messageGo to next message
Bob de Kruyff   United States
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Registered: January 2004
Location: Chandler, AZ
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Senior Member
I've found that those glass fuses sometimes corrode in the holder and that just moving them around a bit will fix the problem.

Bob de Kruyff
78 Eleganza
Chandler, AZ

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Re: [GMCnet] Parking/clearance lights do not turn on [message #248695 is a reply to message #248666] Mon, 28 April 2014 17:23 Go to previous messageGo to next message
batman is currently offline  batman   United States
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Registered: January 2004
Location: Benbrook, TX
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Senior Member
Turns out it was an oxidized fuse holder. Fuse was good and clean, but not the contacts that the fuse was touching. Parking ights are working again Smile

Bob de Kruyff wrote on Mon, 28 April 2014 12:08

I've found that those glass fuses sometimes corrode in the holder and that just moving them around a bit will fix the problem.

eugene
benbrook, tx
77 Eleganza II, Howell EFI + EBL
http://gmc.backyardwildlife.com

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Re: [GMCnet] Parking/clearance lights do not turn on [message #248696 is a reply to message #248695] Mon, 28 April 2014 17:24 Go to previous message
Bob de Kruyff   United States
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
Senior Member
batman wrote on Mon, 28 April 2014 16:23

Turns out it was an oxidized fuse holder. Fuse was good and clean, but not the contacts that the fuse was touching. Parking ights are working again Smile

Bob de Kruyff wrote on Mon, 28 April 2014 12:08

I've found that those glass fuses sometimes corrode in the holder and that just moving them around a bit will fix the problem.




Thank God--it's been a long time since I got one right Smile

Bob de Kruyff
78 Eleganza
Chandler, AZ

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