How do you use 4 wheel drive on a suzuki samuri

limited info generic answer n =neutral and 4l =four wheel drive low your owners manual can assist you or do an online search and include year for an online manual

this is normal changing the config drive you may notice how it changes

Driving on what? dirt,ice?what?
2006 is 2nd year of option AWD
is your car awd?
or part time 4wd used every year to here>
if not AWDhttp://www.fixkick.com/tranny/xfr-case/4wd%20windup/suzuki-grand-vitara-4mode-4wd-selector-switch.jpg

4L is never for dry ice free pavement, ever.
on both AWD and PT 4wd
never
the operators guide says that and the damage word.
read it , lost it? we have it.ask...?

KNOB, see the word lock, ,
means it's not AWD in that mode. 2L lock is part time only.

this page coves all VITS made
from sidekicks ,tracker and newer, say 2006 or so...
http://www.fixkick.com/part-time-test.html

even shows AWD part id 23 that does all that magic.
with AWD. but never in 2L lock.
no center differential in 2L lock, at all.

and is a danger drive, using it wrong.
to you, others and windup damage to car.

that only half the story, the page above
covers lots more.
the rule in 2L is this.
one tire needs be on ice, or dirt.
or bad happens.
same with PT box.

true for VIT and jeeps. lock or part time 4wd

hello and greetings. you did not say what driveline options
were purchase when car was new. so, can not answer.
but if car is PT 4wd, I can. if not get it fixed, by any 4wd shop.

the car is full time 4wd or AWD ?
PT:
the Part time 4wd must not be driving on dry pavement.
so drive to dirt or grass or ice and then shift back to 2wd

there is a TSB from Suzuki on wind up.

exceptions?
sure , the 2004 options statement here. and the rules for PT 4wd.
http://www.fixkick.com/part-time-test.html

Suzuki Grand Vitara/Escudo -full-time 4WD using limited-slip center differential, off-road 4WD with selectable center differential lock and low range transfer case 4 mode (4h, 4h lock, 4l n), traction control and electronic stability control
Suzuki offered as an option AWD for Grand Vitara's in 2004 (XL7 too) Some Suzuki AWD you can not use lock on dry pavement, so read the operators guide carefully.

suzuki sells the operators guide if lost,
$4 day pass
$25 for full pdf.

https://suzukipitstopplus.com/Products/1042-2004-grand-vitara-owners-manual.aspx

Using the shorter gear leaver in the samurai, the gear choices are arranged in a simple U fashion. They are arranged in sequence. At left top, bottom, right middle and right top you have 2 high(2H), 4 hight (4H), neutral(N) and 4 low (4L).
2H- Engages rear wheel drive only.
4H- Engages all wheels in 4X4 mode.
N- Disengages all wheels (if you gonna tow your vehicle)
4L- Engages all wheels in 4X4 mode with 50% more torque but you cut your top speed by an equal amount.
If you have the OEM gear knob the diagram of the layout of the transfer box should be imprinted. 2 high should be used on dry and mildly wet paved roads. Using 4L or 4H in these conditions may result in damage to your transfer box. You may use 4L or 4H in any other road conditions.

There are three driving modes: 2H, 4H and 4L, which stands for 4x2 High, 4x4 High and 4x4 Low. There is a modification that can be made on the transfer case to add a 2L (4x2 Low) mode, but that's not original.
In order to use any of the 4x4 modes you will also have to step out of the car and turn the free wheeling hubs to the "lock" or "4x4" position.

As this model doesn't have a centre differential, you CANNOT use 4WD on hard surfaces. You will experience transmission "wind-up" which on a good day will make it difficult to select 2WD again, and on a bad day will break something in the driveline.

4h means high range 4wd and 2L and 4L means 2 wheel and 4 wheel low range. low range is used when going through washouts and down washed out hills etc. do not use the brake as the vechile may slide. low range is basically just letting the car do the work and idle it down hills etc where 4wd is needed. don't try to drive normally while any 4wd is engaged as you will damage it.

4-wheel high or 2 wheel if it has it