Just had the same problem. Replace the Multi Function (turn signal) switch on the steering column
Have you checked the drl relay?
your bulbs are burnt out. when you switch on the high beams its only the high beams. but when you flash your brights it lights up both high and low beams.
Check all fuses and check for burn out headlights, high and low beams
daytime running lights for chevys are automatic. you cant turn them off. all you can do is control the high and low beams.
Bad bulbs Bad dimmer switch
Basically, it comes down to the year of the vehicle, and whether it has "City" lights. Running lights (a.k.a. daytime running lights) can be an intergal part of the headlight bulb, meaning that it's the same bulb, as your low beams, just lower voltage signal. With city lights, you need a different bulb. Refer to a Repair Manual (I prefer Bentley [TM]).
As a guess both low beams are burnt out The daytime running and high beams are the same light filament. Or the fuse or the relay for the low beams.
i have the same problem.did you find out what it was? maintenance@rescraft.com
acid drips from your battery onto the wiring harness. corrodes a wire connector near rad support. bin there, done that.
Why would you? Fog lights are designed for use in poor driving conditions such as fog or rain at night. Using high beams under those conditions would make matters worse, that's why your vehicles fog lights won't operate when the high beams are on.
yes, if truck has day running lights, the low beams are on at all times, when head lights are turned on by the switch, the voltage is increased on low beams to a full 12 volts on low beam, when switched to high beam, all four are on.
the fog lights work with the low beams , they wont come on with the high beams