I discovered something interesting on a rainy day.

First the engine is shut off and the wiper switch is placed in any position except. off.
Then the engine is started and the instrument panel shows dimmed lighting. So far I thing all is normal. Oops the wipers are working.
When the wiper switch is placed to off (it stopped raining, let say), the instrument lighting (including cluster and radio) brightens up.

Is this normal?
Should the wiper system interact with the instrument dimming system?

Let me know if you have observed the same situation.
Feel free to explain that one to me please.

Note. 2010 Dodge ram cc rambox sport 1500

 

It's one of the options in the EVIC. When ever you turn on the wipers it will turn on the headlights.

 

Yep. Wipers on = headlights on = dash lights dim to whatever level you have set. It's a safety feature because having the extra visibility of headlights on while road conditions are rainy is a good idea.

Rob

 

Agreed, its the law here in AR, you have to have headlights on when your wipers are on.

 

Thanks guys.
To find out that it is the law, in some part of the country is interesting.
I appreciate the replies.

 

I was wondering about this too. I have the exact same truck but I figured it was just me looking at it at the right time or something, and it must be my imagination. Thanks for letting me know that I'm not nuts! LOL.

 

I have a 2010 slt and the lights quit coming with wipers.Any suggestions?

 

Have you checked what the option in the EVIC is set for? Did it get turned off for some reason (battery disconnected for a while, service work performed that may have reset the computer)?

Rob

 

Yes it is checked to come on with wipers.

 

Sounds like a trip to the dealer then. Something's not right.

Rob