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i have a 2001 outback if you turn the turn signal on it will take out the dash lights and gauges.after a little time they come back on. the four ways work and if you unplug them you have no turn signals but the gauges work. i tried a new turn signal switch and ignition switch. there was no change please help thank you.

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Is it just the lighting in the cluster or do all of the dash lights go out? (HVAC, stereo, etc.)

Does it matter which way the signal stalk is moved? (Up/down)

Have you checked fuses for bad connection?

 

 

The hazard lights are powered by a different source since they have to work without the key in the ignition. I would suspect a bad connection powering the dash cluster. The big question is, do the signal lights outside still work properly after the dash lights go out?

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If it was on one side only, I would suspect that a wrong bulb could have been installed at one corner, causing a connection between the two circuits. Now it looks unlikely, unless someone replaced all 4 bulbs with wrong type.

If it's a bad ground connection, could be one for the cluster. In that case, when turn signals are off, there will be a ground path through the turn indicator bulbs. The current drawn by the cluster is small and so would be the voltage drop at the bulbs.

Edited by avk
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The trouble does indeed sound like a bad chassis ground issue like Naru stated. Try cleaning the battery to chassis ground connection to see if that helps. If that doesn't help then try running a temporary ground wire from the battery to the dash area and see if that changes things. If it does then clean the dash grounding points.

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