The first thing I'd do is check the fuse. If the fuse is good the you might have a short in a wire somewhere.
Check the daytime running lights module. This has failed with other manufactures resulting in lights that stay on, or are very dim while the vehicle is running.
If the headlight that runs through the modulator first is out then the daytime running lights won't work. Change the bulb and the daytime lights should then work.
Answering my own question here, it's what I thought it was. One of my high beams was out, so my high beam indicator was flashing when my headlights were not turned on. As for the daytime running lights, they came back on when I changed the bulb.
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.
On my 98 sunfire, the tail lights and marker lights only work if you turn on the headlights. If only the daytime lights are on, the Pontiac on the trunk is illuminated but no other lights at the rear until brakes or turn signals are activated. This is common with a lot of vehicles out there. Daytime running lights are not necessarily the same candle power as the headlights. I can tell a big difference in mine.
GO AND BUY I NEW light bulb !
I have had this problem on my girlgfriends car. Check the wiring running to the lights behind the drivers side headlight under the battery box. The wires were sealed with duct tape from the factory and the connections have just corroded. It's actually a pretty easy fix but dont put it off too long because you eventually wont have lights at all. .
Evidentally the lights were wired up wrong. You will have to take ti to someone and have it streightened out. Are you sure they don't work? They only come on when the engine is running and the vehcile is in gear. If you just start the truck up and look for the lights, they will not be on. It has to be in gear.
The questions is disjointed that it is impossible to answer....you need to be clear what is wrong and what you want The car is on? Are you sure it's not just the daytime running lights?
If the high and low beam headlights stopped working on a 2000 Toyota Tundra, the fault could be with the headlight relay switch. This is a large fuse located in the fuse box on top of the battery.
same problemit maybe broken and cracked wires which is located in the headlamp wire harness. the harness may need to be replaced. Pink wire in the harness where it passes between the frame and windshield washer bottle is corroded.....easy fix.
Just replaced the headlight bulbs in a 98 Grand Cherokee that had the same problem. It had the wrong bulbs in it. It had 9007's in it. Calls for 9004's.