The headlights only work if I pull the dimmer switch towards the steering wheel. then they only stay on high beam

The service and repair manual with a diagram which will help you to locate and fix the problem on your own and you will get the manual from the given link http://toolsnyou.com

Both the headlight switch and the BCM provide a ground, or control circuit, to the headlight relay coil circuit for manual or automatic headlamp operation. When you place the headlamp switch in the OFF position, and the ambient light sensor indicates low light conditions, the BCM energizes the headlamp relay for low beam operation. You may switch the headlights to high beam by pulling the dimmer switch handle toward you until the dimmer switch is activated. When the dimmer switch is placed in the HIGH position, the indicator lamp input to the BCM is pulled low. The BCM then sends a class 2 message to the instrument cluster in order to illuminate the high beam indicator lamp.
Low and High Beams Headlamps Inoperative ?
Replace the headlamp switch. Refer to Headlamp Switch Replacement .
Did you check the headlamp relay ? Location ,left instrument panel
Did

You need to check the wires in the steering column. Take the column cover off, probably phillips-head screws, so you can see the wires. Somewhere the tilting function is putting pressure on the wires to the dimmer switch. It may be pulling loose a connection, just a fraction, to lose contact. You may also need a new dimmer switch. Or a multifunction switch if the dimmer switch is attached that way. The headlight switch is on the dash, isn't it? If it is, the headlight switch is not the problem, it is the wires in the steering column or the dimmer switch. If the dimmer switch fails, you will have no high or low beams, no head lights at all.

I don't believe there is a fuse. There is a circuit breaker built into the headlight switch. If you are sure the headlight switch is good, it could be a bad dimmer switch. If you have a voltmeter, with the headlight switch turned on, a larger yellow wire going from the headlight switch to the dimmer switch should be a hot wire. The dimmer switch sends power on a tan wire to the low beams, and through a light green wire to the high beam bulbs.
If your high beam indicator on the dash also doesn't work, then it is likely one of those switches. A voltmeter or test light would need to be used to find which one is bad. If you can find the connector at the steering column going to the dimmer switch, pull it apart and check for power on the yellow wire coming from the headlight switch, with the headlight switch turned on. If no power, the headlight switch is bad. If there is power there, then the dimmer switch must be bad.

Dimmer switch loose/out of adjustment. Lower steering column gently, find the dimmer actuated witha metal rod. hold the rod in place this is imperitive. Loosen up the switch and tap it up toward the steeringwheel 1/16th an inch at a time untill it works properly. May need to replace the switch, if so just make sure you hold the rod in place with tape or something, because if the rod falls down, you may have to remove the steering wheel to get it back in place.

The problem will be due to a malfunctioning headlight dimmer switch and a dimmer switch connector. Also check the high beam connector.

There is a headlight relay in the engine compartment fuse box, but its after the headlight switch and before the dimmer switch, so it powers both high and low beam circuits.
I would check the dimmer switch.

the low beam circuit in head light switch may have an open

pull on the signal lever toward you (ceter position). the signal lever controls the head lights either high beam or low beam. if you pull on the signal lever toward you again, you will have high beam temporarily. and if you push the signal lever towards the front, you will have the high beam locked.