ChevelleForum.net

Go Back   Chevrolet Chevelle Forums > Chevrolet Chevelle Garage > Electrical

Reply
 
Thread Tools Display Modes
  #1  
Old 10-17-2010, 06:40 PM
bw396ss's Avatar
bw396ss bw396ss is offline
Junior Member
 
Join Date: Jan 2010
Location: Sparta, Mo
Posts: 10
Default Dash light issues

My 68 has developed an issue where the dash lights seem to dim and the turn signals will glow when the headlights are on. Also when this happens the fuel gauge reads empty. As soon as you turn the head lights off or turn the headlight switch fully clockwise (shutting off the dash lights), everthing returns to normal including the fuel indicator. The clock also works just fine and the headlights, etc., are unaffected.
After looking at the wiring diagram I cannot see any direct connection between the fuel gauge and the dash lighting. I guess if some thing could shorting out the fuel gauge, but it is not clear to me how.
Any idea?
Thanks,
Bill
__________________
Bill W
67 Chevelle SS
68 Chevelle SS
69 Chevelle SS
Yes, we are Chevelle Crazy.
Reply With Quote
  #2  
Old 10-17-2010, 07:05 PM
RBeckman's Avatar
RBeckman RBeckman is offline
Senior Member
 
Join Date: Apr 2010
Location: Fenton Mi
Posts: 1,439
Send a message via MSN to RBeckman
Default

It sounds like a ground issue, check the grounding wire behind the right headlight...also the ground from the body to motor that should be by the starter...at least that is where the grounds are on a 69. It sounds like a grounding problem to me so check all of them.
__________________
Ric Beckman
1969 Chevelle SS396
1972 Camaro SS350
Reply With Quote
  #3  
Old 10-17-2010, 07:08 PM
grumpy's Avatar
grumpy grumpy is offline
Administrator Bowtie Member
 
Join Date: Dec 2009
Location: Royal Oak, Mich
Posts: 1,230
Default

Maybe the voltage regulator ?
__________________
Dave
Reply With Quote
  #4  
Old 10-19-2010, 08:30 AM
bw396ss's Avatar
bw396ss bw396ss is offline
Junior Member
 
Join Date: Jan 2010
Location: Sparta, Mo
Posts: 10
Default

Will check it all out.
Thanks again.
Bill
__________________
Bill W
67 Chevelle SS
68 Chevelle SS
69 Chevelle SS
Yes, we are Chevelle Crazy.
Reply With Quote
  #5  
Old 10-20-2010, 02:33 PM
Hank70SS's Avatar
Hank70SS Hank70SS is offline
Moderator
 
Join Date: Dec 2009
Location: Brighton, MI
Posts: 4,719
Default

Forward light harness grounds, Ric mentioned this. On a 70 there are grounds on both sides by the headlights. Also the voltage regulator ground, should be mounted on driver's side of rad support.

Don't think your chassis ground is correct Ric, not that it doesn't work. Chassis ground to battery should be through a short pigtail off the negative battery post to the passenger side fender. Engine ground is from battery to cylinder head or block.
__________________
Hank

70 Chevelle SS396(454), M20, 3.73
My Chevelle
Reply With Quote
  #6  
Old 10-22-2010, 07:19 PM
bw396ss's Avatar
bw396ss bw396ss is offline
Junior Member
 
Join Date: Jan 2010
Location: Sparta, Mo
Posts: 10
Default

Removed and cleaned all the ground connections in the engine compartment but it was not until I got under the dash that the real issue surfaced. Seems the ground was not good to the dash. Added a new ground and all is fine. I hate chasing electrical problems.
Thanks all for you advice.
__________________
Bill W
67 Chevelle SS
68 Chevelle SS
69 Chevelle SS
Yes, we are Chevelle Crazy.
Reply With Quote
  #7  
Old 10-22-2010, 08:09 PM
RBeckman's Avatar
RBeckman RBeckman is offline
Senior Member
 
Join Date: Apr 2010
Location: Fenton Mi
Posts: 1,439
Send a message via MSN to RBeckman
Default

Glad you found it...now you have all your grounds cleaned and in good working order and you know where they are now...so all is good.
__________________
Ric Beckman
1969 Chevelle SS396
1972 Camaro SS350
Reply With Quote
  #8  
Old 02-18-2012, 02:59 PM
70SS454's Avatar
70SS454 70SS454 is offline
Member
 
Join Date: Feb 2012
Location: Lucas, TX
Posts: 65
Default

Bw396ss, I have the exact same problem on my 70 SS. Where is the dash ground?
Reply With Quote
  #9  
Old 02-18-2012, 06:45 PM
grandsport grandsport is offline
Banned
 
Join Date: Dec 2009
Location: Latrobe,Pa.
Posts: 4,878
Default

I must do mine when I replace the printed circuit.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 08:40 AM.



Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Audiokarma.org