2004 4WD Not working!!!!! Any ideas?

Had some light snow tonight and I tried to put my 04 Tacoma Access cab into 4wd and it would not work. No dash indicator and def no 4wd. Any ideas as to where to look first? The truck has the 2.7 4 cyl motor, 5spd trans and manual 4wd shift engagement. It worked perfect last year for me..............Im hoping it's something simple.
Truck has 130K miles on it.

 

Well since 4 wheel drive engagement is partialy electricly involved I'd start there since you said theres no indicator lights coming on, check all your fuses related to it & also you said "it worked fine last year" Does this mean that it hasn't been engaged since then ? Even if you don't off road your truck you need to put it into 4x mode at least 3 times a year just to energize those electrical components that control 4x4 operation so they stay operational. "Use it or lose it" I guess is what I'm saying......

 

It's a manual shifter....
Are you sure its shifted in the whole way?

Check the linkages also.

 

Thanks for the great info guys.........Last night when I tried to put in her in 4wd, I tried 4H as well as 4L................I def felt the gearing down when I put it in 4L so im pretty certain that the linkage was fully engaged.
Anyhow, today I took the truck out and repeatedly tried engaging and disengaging the 4wd, out of no where the 4wd dash inidicator light came on and now seems to be working fine. I have a very steep driveway thats covered in snow, so I know its def working now.
I guess from now on I will put her in 4wd at random times to keep everything going. Just glad it started working again.
Thanks

 

Your welcome........

 

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I just had the same problem on my 2001.
Replaced the 4X4 Detact Switch located on the transfer case. ($75.65 part). PN 8422235110
Works now.

 

Same issue on my 2004 Tacoma SR5. Replaced Transmission Control Relay, and 4wd switch on passenger side of transfer case. Still nothing. 2.7L Manual