My apologies if this thread seems redundant but I thought it worthy to start this thread in case some are still struggling with No Sound from the rear or hatch speakers in their 5th gen Toyota 4Runner.
Replace those cheap Toyota stock speakers (if you can call them that)
*you can test them with a 9v battery*
Because they are wired in series if one blows on either side (that side will not work) MY REAR DOOR SPEAKERS AND HATCH SPEAKERS were ALL blown out by the previous owner.
If your rear door speakers work just jumper the hatch speakers at the connector on the speaker wiring harness to bypass the hatch.
I replaced the rear door speakers with Kicker 47KSC6504
KS Series 6-1/2" 2-way car speakers from Crutchfield.
Kicker 47KSC6504 KS Series 6-1/2" 2-way car speakers at Crutchfield
(Crutchfield says they won't work but they mounted up perfectly with the enclosed Kicker speaker adapters and Metra 72-8104 Speaker Wiring Harnesses)
Metra 72-8104 Speaker Wiring Harnesses For select 1992-up Toyota-built vehicles — adapt new speakers to the factory wiring plugs at Crutchfield
For the hatch speakers I went with:
Kenwood KFC-1396PS
Performance Series 5-1/4" 2-way car speakers
Kenwood KFC-1396PS Performance Series 5-1/4" 2-way car speakers at Crutchfield
Now: All 8-speakers work together.
Party Mode disables the Rear Door speakers and sends more power to the rear hatch speakers.
*Note: You'll want to sound deaden the hatch panel or any decent speakers will vibrate and rattle.
I am running a BV800ACP head unit w. a built-in internal amp (20 watts RMS/80 peak x 4 channels. This powers 6-8 speakers in this setup nicely.
Attached is a picture showing how to bypass the hatch speakers if you only want the rear doors working out of series.