4 wheel drive lock button does not work or indicator light button

please ask again.
are you asking a driveline question, and is vastly complex. read it.
awd?
off the wiki, , does this help,?
the Ridgeline is powered by a transversely mounted J35A9, (2006-2008) J35Z5, (2009-present) 3.5 L V6 with a five speed automatic transmission. The all-wheel drive system operates in front-wheel drive mode under normal conditions and automatically transfers power to either rear wheel via a locking differential when it senses a loss of traction in the front. The VTM-4 system can be locked in first, second or reverse gears at speeds under 18 mph (29 km/h).
The VTM-4 lock (rear diff lock) works in full rear power mode up until 6 mph (9.7 km/h) then it gradually transitions to power to the front and releases the VTM-4 lock at 18 mph (29 km/h)
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Something you can do is to tap the 4/4 motor under drivers side on the back of transfer case with key on engine off. Have someone work the buttons as you gently tap the motor. Don't hit so hard as to dent it. Usually works.

Yes they do all icons are manually light by individual circuits running from wiring harness.

on the transfer case area there should be a relay to tell it to go in to 4x4. now once you put a blazer in 4x4 and no longer need the 4x4 En-gauged you will need to put the blazer in revers and back up 10 to 15 feet to get it out of 4x4 before driving.

sounds like you have either a lose conection at the 4 wheel drive switch or a lose ground!!!!!

bring it back to the dealer, it should be covered under the warranty.

You must have a lemon. My 2007 with 40k on it has no issues....Silky smooth

Press the button while in reverse or D1

are you having any particular problems with Your 08 Ridgeline? I am ! 4 wheel drive lock button, not functioning or indicator light, and No heat on the floor was told by dealer is all NORMAL! I do have a manual, I;d be happy to look something up for you. have you experienced any of these problems that are deemed NORMAL by the dealer? but I am also searching the net for answers or particular recalls.

That light sounds like a differential lock or 4-wheel drive. This is usually found in 4-wheel drive and all-wheel drive vehicles. Being the light is "GREEN" and not amber or red tells me that it's not an abnormal problem.

Look around your dashboard or gearshifter for a button labeled 4x4 HI, 4x4 LO, 4x2 HI. sport/off road button, or a second, smaller shifter. Switch them around a little, and if it is a 4x4 selector, be sure when you drive on paved roads to have it set to 4x2 HI. 4x4 HI should only be used if you get stuck to help you get out (snow/mud) and 4x4 LO is only for off road driving (trail blazing/rock climbing/4-wheeling/mud bogging,etc.)

Also, check for any switches labled "DIFF LOCK" or 'AXLE LOCK". In most cars a green light is normal operations.

I hope I could help you find a solution to your problem.