2004 Tacoma, one touch 4wd, replaced radio, now the 4WD light doesn't work.

I can hear the relay clicking in the console and the 4wd clicks under the truck. All my fuses are good, but 4WD isn't engaging. Any ideas? I did some searching and seems like a lot of vacuum leaks, could I have inadvertantly blown something when replacing the stereo??

Thanks!

 

Ok, first of all, how do you have a V8 Tacoma? If it's a 4.0/4.7/350 transplant, please post pics!

Anyway, I don't know how you could've messed up the 4WD light from changing out the stereo. Did you just change out the HU or mess around hooking up an amp?

I'm thinking it's a totally separate issue. Is the light even blinking?

 

Does the light come on when you first start the truck?

 

Your 4WD engagement is controlled by the 4WD ECU, which is located in the center dash area below your stereo / HU location.

My first guess is that you accidentally disconnected or shorted one or more wires to / from the 4WD ECU during the stereo work.