.....Got one for you, I notice that my DAYTIME RUNNING LAMP LIGHT on the dash is on except when I put the headlamp switch ON, but I don't see any sign of light in the headlamps outside.
Are they supposed to be in the outside LOW BEAM ? I have not taken the bulb out to see, but on bright I only have the inside headlamps on and not all four. Anyone got the good news for me. Thank's,
david g.

 

I have a '99 sierra pick up, the dtrl's are the inside lower lights and are only on while in gear so it's nearly impossible to check them. High beams are the inside upper lows are outside upper if you feel like you need more light with the high beams you can diode isolate the lows and highs and have all four lit when in high beam mode. Also if you have fogs they will shut off in high beam.