4 low issue?

last night I put my truck in four wheel low for the first time.The light came on but it beeps non stop.what am I doing wrong?
Tried backing up and driving in all forward gears till I couldn’t stand it any more.I didn’t need it just stretching its legs.
Thoughts?

 

Put it in neutral first, as per the manual.

 

2018 TRD off-road.

 

Thanks, I’ll give it a try after I get back to camp.

 

If it's a manual you need to fully depress the clutch.

 

Instructions should be on sun visor also

 

Don’t tell them directly about the sun visor... just leave little hints leading them to it next time. I was going to post a partial photo of it and say it’s someplace in your car within reach.

Op- also check out the info on your door handle- another nice feature of these trucks.

 

Well, at least the shifting info on it is pertinent, “Replacement tires should be same specifications as the originals” and “Grease propeller shaft joints” The main driveline doesn’t have zerks, and a lot of us went with larger tires already...

 

Some trucks do, some don't.

 

My ‘17 4wd only has them on the front driveshaft and my service center didn’t touch them. Guess the card is saying do it yourself?