I installed a new head unit in my 4Runner and now the back window wont roll down with the key. Before putting in the new head unit I could put my key into the lock the hatch and turn and hold it on either side and it would roll up and down, but after the new stereo that function no longer works. So my question is does the wiring of the back window have anything to do with the stock radio?

helps to say what year 4runner you have, but no the window wiring doesn't usually run behind the radio. Hard to say what previous owners have hacked up though
does it work from the switch on your center console? both 1st and 2nd gens have the switch there. Did you remove the center console and run any speaker or amp wiring along the tunnel?

How were your fuses?

Is it possible you have the power window lock on? if so it won't roll down (not sure if that is true for using the key)

I have a 2000, but the power window lock is not turned on, and it works from the button in the center of the dash. The previous owner had it wired for subs and an amp but there was no wiring running along the tunnel. It’s not that big of a deal I was just wondering if the radio had anything to do with the radio.

might wanna post this in the 3rd gen folder
this one covers 84-95

This is an old thread but I had a problem with my window not rolling down from the button on the console in my '88. It turned out the rear wiper hadn't returned all the way up. I adjusted it, and it may have been coincidence but I haven't had another issue in 6 months.

I had this issue with my '88 a few years ago. When using the key, if I banged my fist on the tailgate, it would work sometimes. I had one of our techs check it out (I work at a Toyota dealership), to no avail. The problem went away on it's own...
A year or so later, the problem returned. I had a different tech check it out...he found that the plug to the motor wasn't fully clicked into place. Haven't had a problem since.

Does anyone here experience this, my 4th gen 4runner rearwindow only rolls down6" inches but it goes up...It wont go all the way down.

Sorry, wrong forum. You'll have better luck posting on 4th gen forum.

Thank you, thank you, thank you. Made for a very quick fix. This is why I'm here.

Maybe this can help someone out..if you remove the top, and replace it, there is a switch that is engaged by putting one of the bolts back ( covered many times )..
However, make sure to use the right bolt (longer) as the shorter bolts will not reach the plunger and engage the switch. EASY FIX. Or just take driver rear inside panel off , unscrew the switch, push plunger by hand to test. Hope it helps anyone...

Hey man, I know this is really old here but I just figured out what was wrong with mine. I heard the little buzzing and clicks in the rear so I knew it was getting power. My rear wiper also works fine so I thought to raise the gate and pull back the rubber shroud that is around the harness. Low and behold the ground wire was snapped in two and power wire just about the same. With the gate up I could roll the window down so I know motor is good.

Reviving old threads!

I know many of your comments in here are older, but having this issue just arise for myself I thought to post my findings in hopes it will help others with this issues.

My rear window on my 3rd gen recently stopped working but I could hear buzzing/clicking in the rear of the truck so my assumption was power was reaching the target but for some reason the window wouldn't go down. My rear wiper also works just fine - to note. I thought to raise the gate and then try rolling down the window again from inside the cab and IT WORKED! This made me think there might be an issue with the wiring harness that comes from inside the truck to the back gate which is easily seen when you raised the gate. I pulled back this rubber shroud and the ground wire was snapped in two, power wire not far off. Opening the hatch must have pushed the ground together to make contact.

I am going to solder some fresh wire in here to keep the length and rubber wrap it.

Hope this helps the community!

A couple years ago I had a similar issue in my 89 where the rear window would not roll back up. Wiper was in place, bolt was in.

I wound up taking it to a guy who said there was an issue with the grounding. He was able to locate it and fix it pretty cheap.

my rear window does work downwards with the key, but not upwards. Works fine with the button(up and down). What to do?

Switches work for back window, but the key does nothing to the back window. It would be so convenient if it worked LOL. please somebody help