Barracuda Challenger Forum

Author Topic: A new problem to work on - Dash lights go out when headlights are turned on.  (Read 840 times)

Offline spamtank

  • Sr. Member
  • ****
  • Posts: 1663
Well, this just started happening.  I have nice bright dash lights when the parking lights are on.  Until this evening, when I turn the headlights on, they dim a bit (seemed like a feature, since the dash lights don't need to be as bright when it's dark out).  This evening, when I went from parking lights to headlights, the dash lights went dark.

I haven't dug into this yet.  Its probably either a ground problem or a switch problem.  I'm hoping someone else ran across this and solved it by fixing ______?

 :dunno: :clueless: :1zhelp:
Rick, Manchester, NH
1970 SE 383 2V AT Challenger
1977 M882/W200 Power Wagon
2013 RT Plus 6M




Online dodj

  • Sr. Resident
  • ******
  • Posts: 6111
Re: A new problem to work on - Dash lights go out when headlights are turned on.
« Reply #1 on: September 01, 2012 - 08:56:29 PM »
I didn't have the exact same problem, but last year I had my dash lights go dark while driving at night. The cause was the infamous dimmer switch. :2cents:
Scott
1973 Challenger  440 4 spd 
2007.5 3500 6.7 Cummins Diesel, Anarchy tuned.
Good friends don't let friends do stupid things. ........alone.

Offline spamtank

  • Sr. Member
  • ****
  • Posts: 1663
Re: A new problem to work on - Dash lights go out when headlights are turned on.
« Reply #2 on: September 01, 2012 - 09:38:10 PM »
I didn't have the exact same problem, but last year I had my dash lights go dark while driving at night. The cause was the infamous dimmer switch. :2cents:

Thanks for the data point.   :thumbsup:  I double checked the dimmer switch, and it works fine with running lights only.  But with headlights, they go out completely. 

I've been pouring over the wiring diagram.  Right now, I suspect it's the either internal to the headlight switch, or the connector on the headlight switch.

But I've had enough for the night.

Thanks again!
Rick, Manchester, NH
1970 SE 383 2V AT Challenger
1977 M882/W200 Power Wagon
2013 RT Plus 6M


Offline citron fella

  • Jr. Member
  • **
  • Posts: 21
when i first start the car the dome light works but after some time it no longer works i also have no dash lights when my headlamps are on however for some reason both turn signal indicators stay on where should i look first to fix things  thanks
1971 Dodge Challenger #matching 340 citron yella

Offline Bullitt-

  • Permanent Resident
  • *******
  • Posts: 12043
  • Better Things To Come Member Since 2/16/06
when i first start the car the dome light works but after some time it no longer works i also have no dash lights when my headlamps are on however for some reason both turn signal indicators stay on where should i look first to fix things  thanks
Dash lights is likely the panel dimmer switch or perhaps a bad ground.
Indicators staying on is probably a ground issue, perhaps at the body to fixture or it may be your emergency flasher is on with bad flasher
Wade  73 Rallye 340..'77 Millennium Falcon...13 R/T Classic   Huntsville, AL
Having Trouble Uploading Pics?