Notices
C1 & C2 Corvettes General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations
Sponsored by:
Sponsored by:

67 tail light problem

 
Old 02-25-2019, 11:29 PM
  #1  
deejaydu
CF Senior Member
Thread Starter
 
Member Since: Mar 2007
Location: Seabrook Texas
Posts: 2,316
Thanked 72 Times in 64 Posts
Default 67 tail light problem

My 67 tail lights are not working. I have brake lights and turn signals that are all working correctly but no tail lights. I checked the dash light switch and it appears to be working correctly except for the tail lights. Any help would be appreciated.

Jay

Last edited by deejaydu; 02-25-2019 at 11:59 PM.
deejaydu is offline  
Old 02-26-2019, 12:21 AM
  #2  
Railroadman
CF Senior Member
 
Railroadman's Avatar
 
Member Since: Aug 2008
Location: Rochester NY
Posts: 22,615
Thanked 479 Times in 311 Posts
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16-'17-'18-Ď19

Default

It's been said on here that the tail lights are prone to grounding issues. Do the tail lights ground separately from the turn/brake part? My suggestion would be to take a length of wire and create a separate ground you KNOW is good and see if that helps, and go from there.
Railroadman is online now  
Old 02-26-2019, 01:46 AM
  #3  
65 Pro Vette
CF Senior Member
Support Corvetteforum!
 
65 Pro Vette's Avatar
 
Member Since: Aug 2006
Location: Horsham Pa
Posts: 2,018
Thanks: 0
Thanked 186 Times in 142 Posts
Default

I canít believe it would be a grounding problem if the turn signals and brake lights are working. The tail light circuit is by itself and feeds the license plate lights also. I would start at the body harness connector under the dash that feeds the rear lights. Take a test light onto the connector from the main harness I believe 67 itís the brown wire make sure you have power there, if you donít have power there that will eliminate the whole rear harness. Check the fuse, and the headlight switch.
65 Pro Vette is offline  
Old 02-26-2019, 05:30 AM
  #4  
65GGvert
CF Senior Member
 
65GGvert's Avatar
 
Member Since: Jul 2006
Location: Kannapolis NC
Posts: 15,562
Thanked 1,075 Times in 945 Posts
Default

If the license plate light is out too, check for voltage on both the CLIPS that hold the fuse in. Don't just look at the fuse, measure. If the voltage is there, but no license plate light, check the brown wire in the rear body connector under the dash. If that fuse is bad, it will also kill dash lights. Post back and we'll go further.
You don't have a ground issue. Remember that both bulbs tail filaments could be out, Also if you replaced the bulbs recently, the contacts on the new bulbs may not be touching the ones in the socket.
65GGvert is offline  
Old 02-26-2019, 08:06 AM
  #5  
deejaydu
CF Senior Member
Thread Starter
 
Member Since: Mar 2007
Location: Seabrook Texas
Posts: 2,316
Thanked 72 Times in 64 Posts
Default

Yes the license plate light is also out. I forgot to mention that. The fuse is good. It supplies both the brake and tail lights. This problem has just developed as it has always worked properly. I will start checking the brown wire. and the fuse holder. Thanks for the suggestions.

Jay
deejaydu is offline  
Old 02-26-2019, 08:20 AM
  #6  
65GGvert
CF Senior Member
 
65GGvert's Avatar
 
Member Since: Jul 2006
Location: Kannapolis NC
Posts: 15,562
Thanked 1,075 Times in 945 Posts
Default

Originally Posted by deejaydu View Post
Yes the license plate light is also out. I forgot to mention that. The fuse is good. It supplies both the brake and tail lights. This problem has just developed as it has always worked properly. I will start checking the brown wire. and the fuse holder. Thanks for the suggestions.

Jay
The fuse does NOT supply both the brake and tail lights. The bottom fuse feeds the brakes and courtesy lights. The tail lights is a separate fuse (second from bottom). You need to trust me on this and measure the voltage on the tail light fuse on the clips on both ends. Not the brake light fuse. As I said earlier, if your tail light fuse is blown you won't get dash lights either.

Last edited by 65GGvert; 02-26-2019 at 08:24 AM.
65GGvert is offline  
Old 02-26-2019, 09:29 AM
  #7  
Frankie the Fink
CF Senior Member
Support Corvetteforum!
 
Frankie the Fink's Avatar
 
Member Since: Aug 2007
Location: Orlando Metro Area Florida
Posts: 47,207
Thanked 3,307 Times in 2,626 Posts
Default

If 65GGvert gives you electrical troubleshooting advice, you can take it to the bank.
Frankie the Fink is offline  
The Following 3 Users Say Thank You to Frankie the Fink For This Useful Post:
65GGvert (02-26-2019), mike coletta (02-26-2019), Tom Heffernan (03-06-2019)
Old 02-26-2019, 10:08 AM
  #8  
deejaydu
CF Senior Member
Thread Starter
 
Member Since: Mar 2007
Location: Seabrook Texas
Posts: 2,316
Thanked 72 Times in 64 Posts
Default

Originally Posted by 65GGvert View Post
The fuse does NOT supply both the brake and tail lights. The bottom fuse feeds the brakes and courtesy lights. The tail lights is a separate fuse (second from bottom). You need to trust me on this and measure the voltage on the tail light fuse on the clips on both ends. Not the brake light fuse. As I said earlier, if your tail light fuse is blown you won't get dash lights either.
I do have dash lights. I will check both ends of the clip and report back.

Thanks

Last edited by deejaydu; 02-26-2019 at 10:38 AM.
deejaydu is offline  
Old 02-26-2019, 10:58 AM
  #9  
65GGvert
CF Senior Member
 
65GGvert's Avatar
 
Member Since: Jul 2006
Location: Kannapolis NC
Posts: 15,562
Thanked 1,075 Times in 945 Posts
Default

I'd like to help, but I feel like you're not reading everything. No use checking the fuse if you have dash lights. The problem you have, if you have described the symptoms accurately, is lost continuity of the brown wire between the headlight switch and the brown wire at the rear of the car. The only connection is at the rear body connector above the driver's side kick panel. Either the brown wire is not fully seated into the headlight switch connector (very possible), a bad connection in that rear body connector, or a broken wire between the two points. First thing I'd do is check the brown wire going into the headlight switch. Pull the park lights on and measure on the wire for 12v. If you have it there, measure on the rear body connector for 12v on the brown wire going in and out. If you have it there, you have a broken wire between that connector and the rear of the car. Both tail lights and the license plate light get their voltage on that single brown wire. It goes to the license plate light and splits off into the two tail lights. If you do have dash lights, the problem is narrowed down to a very small possibility of locations, starting with the headlight switch. It may not be switching the 12v to the brown wire. Please note there are TWO brown wires on the headlight switch. One from the tail light fuse supplying voltage and one out to the rear body connector to light the tail lights. One will have voltage all the time, the other only when you pull on the headlights or park lights. If you short those two brown wires together and you have tail lights, the switch is not working.
Summary, start with looking at the headlight switch connector and the rear body connector to make sure all the wires are pushed in the connectors firmly. I have seen on more than one occasion where a wire was pushed out of the headlight connector.

Last edited by 65GGvert; 02-26-2019 at 11:02 AM.
65GGvert is offline  
Old 02-26-2019, 11:17 AM
  #10  
leif.anderson93
CF Senior Member
 
leif.anderson93's Avatar
 
Member Since: Feb 2014
Location: Richardson Texas
Posts: 2,197
Thanked 364 Times in 325 Posts
Default

Originally Posted by Frankie the Fink View Post
If 65GGvert gives you electrical troubleshooting advice, you can take it to the bank.
Absolutely, 100%
leif.anderson93 is offline  
The Following User Says Thank You to leif.anderson93 For This Useful Post:
65GGvert (02-26-2019)
Old 02-26-2019, 11:51 AM
  #11  
deejaydu
CF Senior Member
Thread Starter
 
Member Since: Mar 2007
Location: Seabrook Texas
Posts: 2,316
Thanked 72 Times in 64 Posts
Default

Originally Posted by 65GGvert View Post
I'd like to help, but I feel like you're not reading everything. No use checking the fuse if you have dash lights. The problem you have, if you have described the symptoms accurately, is lost continuity of the brown wire between the headlight switch and the brown wire at the rear of the car. The only connection is at the rear body connector above the driver's side kick panel. Either the brown wire is not fully seated into the headlight switch connector (very possible), a bad connection in that rear body connector, or a broken wire between the two points. First thing I'd do is check the brown wire going into the headlight switch. Pull the park lights on and measure on the wire for 12v. If you have it there, measure on the rear body connector for 12v on the brown wire going in and out. If you have it there, you have a broken wire between that connector and the rear of the car. Both tail lights and the license plate light get their voltage on that single brown wire. It goes to the license plate light and splits off into the two tail lights. If you do have dash lights, the problem is narrowed down to a very small possibility of locations, starting with the headlight switch. It may not be switching the 12v to the brown wire. Please note there are TWO brown wires on the headlight switch. One from the tail light fuse supplying voltage and one out to the rear body connector to light the tail lights. One will have voltage all the time, the other only when you pull on the headlights or park lights. If you short those two brown wires together and you have tail lights, the switch is not working.
Summary, start with looking at the headlight switch connector and the rear body connector to make sure all the wires are pushed in the connectors firmly. I have seen on more than one occasion where a wire was pushed out of the headlight connector.
Thank you very much for this very helpful information. I currently have the switch out because I thought that might be the problem from the very beginning. The only thing that I have not looked at yet is the connector behind the kick panel. Do I need to remove the kick panel or is it up higher. I will check out the connector and report back. I will disregard the fuse readings since I do have dash lights. Is there a way to test the switch out of the car? Thanks again very much for your help and expertise.

Jay
deejaydu is offline  
Old 02-26-2019, 12:10 PM
  #12  
65GGvert
CF Senior Member
 
65GGvert's Avatar
 
Member Since: Jul 2006
Location: Kannapolis NC
Posts: 15,562
Thanked 1,075 Times in 945 Posts
Default

It's above the kick panel. You can read continuity between the two lugs where brown wires on the switch go, or you can read my last post and check it the way I said there. Put the connector back on the switch, pull to the park position and read for 12 volts on both brown wires. If you've only got it on one, switch is bad. (If the wire's plugged in correctly). if you got it on both and no tail lights then move on to the rear body connector.
65GGvert is offline  
Old 02-26-2019, 12:35 PM
  #13  
deejaydu
CF Senior Member
Thread Starter
 
Member Since: Mar 2007
Location: Seabrook Texas
Posts: 2,316
Thanked 72 Times in 64 Posts
Default

Originally Posted by 65GGvert View Post
It's above the kick panel. You can read continuity between the two lugs where brown wires on the switch go, or you can read my last post and check it the way I said there. Put the connector back on the switch, pull to the park position and read for 12 volts on both brown wires. If you've only got it on one, switch is bad. (If the wire's plugged in correctly). if you got it on both and no tail lights then move on to the rear body connector.
Ok this is how I will proceed and report back. Thanks again.

Jay
deejaydu is offline  
Old 02-26-2019, 11:31 PM
  #14  
deejaydu
CF Senior Member
Thread Starter
 
Member Since: Mar 2007
Location: Seabrook Texas
Posts: 2,316
Thanked 72 Times in 64 Posts
Default

I was able to confirm that the brown wire at the rear connector block was not loose and also the connection at the switch is good. I was not sure how to jumper out the brown wire to check to see if the switch was good so I will have to figure that out then check the switch. If the switch is good then like 65GGvert say's it has to be a break in the brown wire somewhere.I think that the switch is good because when I pull the parking lights on the fronts come on along with the dash lights. When I pull the headlights on they come on along with the dash lights.That all seems normal. I will keep working until I find the problem. This just came out of nowhere as they have been working perfectly for years.

Jay
deejaydu is offline  
Old 02-27-2019, 06:07 AM
  #15  
65GGvert
CF Senior Member
 
65GGvert's Avatar
 
Member Since: Jul 2006
Location: Kannapolis NC
Posts: 15,562
Thanked 1,075 Times in 945 Posts
Default

I've gone as far as I can go if you're not going to use a volt meter.
65GGvert is offline  
Old 02-27-2019, 06:40 AM
  #16  
65GGvert
CF Senior Member
 
65GGvert's Avatar
 
Member Since: Jul 2006
Location: Kannapolis NC
Posts: 15,562
Thanked 1,075 Times in 945 Posts
Default

Or, in this case a test light would work.
65GGvert is offline  
Old 02-27-2019, 10:41 AM
  #17  
deejaydu
CF Senior Member
Thread Starter
 
Member Since: Mar 2007
Location: Seabrook Texas
Posts: 2,316
Thanked 72 Times in 64 Posts
Default

I will be checking with both but I only had time to check for loose connections yesterday. I will report back with the results.

Thanks to all who have pointed me in the right direction.

Jay
deejaydu is offline  
Old 02-28-2019, 06:36 PM
  #18  
65GGvert
CF Senior Member
 
65GGvert's Avatar
 
Member Since: Jul 2006
Location: Kannapolis NC
Posts: 15,562
Thanked 1,075 Times in 945 Posts
Default

Any progress?
65GGvert is offline  
Old 02-28-2019, 06:59 PM
  #19  
deejaydu
CF Senior Member
Thread Starter
 
Member Since: Mar 2007
Location: Seabrook Texas
Posts: 2,316
Thanked 72 Times in 64 Posts
Default

I am just heading out to work on it now. My internet is going to be down starting tomorrow until next week. If I do not report back this evening I will report back next week when my internet is restored.

Thanks for checking in.

Jay
deejaydu is offline  
Old 03-01-2019, 10:13 PM
  #20  
65GGvert
CF Senior Member
 
65GGvert's Avatar
 
Member Since: Jul 2006
Location: Kannapolis NC
Posts: 15,562
Thanked 1,075 Times in 945 Posts
Default

Originally Posted by deejaydu View Post
I am just heading out to work on it now. My internet is going to be down starting tomorrow until next week. If I do not report back this evening I will report back next week when my internet is restored.

Thanks for checking in.

Jay
It's not possible to live that long without internet.
65GGvert is offline  

Thread Tools
Search this Thread
Quick Reply: 67 tail light problem


Sponsored Ads
Vendor Directory

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: