[Wheeler607]

I have a 7.6 straight blade on an 03 chevy 2500hd. Plow lights have worked great for years but now truck headlights stay on when I switch over to plow lights..drivers side plow light is on but dime...I have changed all 3 relays and checked connections but not finding anything to be the problem...taking suggestions. Hoping someone else has had this problem and can help...thanks in advance

 

[dieselss]

Hows the grounds?
They corrode right under your nose

 

[Wheeler607]

Ground is good..I have checked and diolactic greased all connections. ..plow functions as it should just truck lights stay on when they should go off when plow lights go on

 

[Hydromaster]

Is the fuse good and is the lead connected
To the batt?
If the fuse is good and the lead is hooked up
Then you could have a bad switch on the controller.