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When I turn switch to headlights, all lights go off including dash lights.

Tiny
ALBATROSS7677
  • MEMBER
  • 1987 VOLVO 740
  • 124,000 MILES
When I turn on running lights they come on. Is this a problem with the dashboard switch?
Tuesday, September 6th, 2011 AT 2:50 PM

3 Replies

Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
It could be the switch. However it sounds like a bad ground somewhere. Grounds are tough to chase as a ground for something else that is in the engine bay could be bad and back feeding into the dash.
To test switch, remove and check for continuity in the on position with multi-meter.
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Tuesday, September 6th, 2011 AT 5:26 PM
Tiny
ENGINER
  • MEMBER
  • 6 POSTS
My '92 had a slightly similar problem that went away. I drive with the lights of, and at night the dash lights start dark and gradually come on over a minute or two. Obviously an ambient light sensor somewhere.
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Sunday, January 8th, 2012 AT 1:17 PM
Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
If it goes away that is okay but there has to be something wrong that will more than likely return and it is a safety issue where you might not even notice your llgihts are out.
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Monday, January 9th, 2012 AT 12:47 AM

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