What to do if the daytime running lights can not open?
Open the auto ignition switch, the switch in the closed, daytime running light can not work normally, should check the following:
1) check the vehicle ignition switch output end of the power supply voltage is normal ( 10V~30V ).
2) check the daytime running light wiring harness wiring is installed correctly. ( black line connected to the ignition switch output end, brown line connects car battery cathode, gray line connected to the switching of the output end )
3) the grey line suspension ( not to), to open the auto ignition switch, check the daytime running light is often bright. If the bright, then gray line connection error, check whether the correct gray line connected to the output end.
4) the above examination are correct, the black line car battery positive electrode, brown line connects the battery anode, gray line suspended, check whether the normal daytime running lamps for lighting. Daytime running lamps to light, to check the mounting line ( reference line installation ), day driving point can not be lit, it needs to change the wiring harness or daytime running light.