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Toyota factory radio options.

A Deluxe AM/FM ETR/Cassette with 4 speakers is optional on the Regular Cab and the Premium 3-in-1 AM/FM ETR/Cassette/CD with 6-disc in-dash changer with 6 speakers is optional on the SR5 Access Cab. There are no Toyota optional audio units for the Limited models.

Additional audio options include:

• Auto-Reverse Cassette Deck with Dolby®²
• CD Deck
• In-Dash 6-Disc Changer

The factory radios that include 6 speakers have a separate head unit and amplifier. On these configurations the standard Toyota radio harness connections plug into the amplifier instead of the radio/ head unit. A pigtail on the amplifier with 20-Pin connection, connects the amplifier to the head unit.

Sequoia:
The Sequoia SR5 comes standard with the Deluxe 3-in-1 AM/FM ETR/Cassette/CD with 6 speakers. The Limited comes standard with the JBL Premium 3-in-1 AM/FM ETR/Cassette/CD with 10 speakers. The JBL Premium 3-in-1 AM/FM ETR/Cassette/CD with 10 speakers is optional on the SR5. The JBL Premium 3-in-1 AM/FM ETR/Cassette/CD with 6-disc in-dash CD changer and 10 speakers is optional on the Limited.

The standard radio in the Sequoia has separate head unit and amplifier. The standard Toyota radio harness connections plug into the amplifier instead of the radio/ head unit. The JBL Premium units with 10 speakers have 2 amplifiers, one amplifier for the front door speakers and a second amplifier for the rear door speakers.

Toyota Wiring:

Standard Toyota radio harness connections.

Connector "A" Color Connection Pin Red RH Rear Door Speaker (+) 1 Black LH Rear Door Speaker (+) 2 White RH Rear Door Speaker (-) 3     4     5 Yellow LH Rear Door Speaker (-) 6 Connector "B" Color Connection Pin Lt. Green RH Front Door Speaker (+) 1 Pink LH Front Door Speaker (+) 2 Gray Radio 12V Switched (+) 3 Blue/Yellow Radio 12V Constant (+) 4 Blue RH Front Door Speaker (-) 5 Violet LH Front Door Speaker (-) 6 Brown Ground (-) 7     8     9     10

20-Pin connector from amplifier to head unit

Color Connection Pin Blue B+ 12V Constant 1 Violet Illumination (+) 2 Pink Factory Remote Amp Turn-on 3   NOT USED 4   NOT USED 5   NOT USED 6 Brown Mute 7 Black Right Front (+) low level signal 8 Blue Left Front (+) low level signal 9   NOT USED 10 Gray Acc 12V Switched (+) 11 Lt. Green Illumination (-) 12 Black/Red Unknown 13   NOT USED 14   NOT USED 15 White Common Ground (-) 16 Red Beep 17 Green Right Rear (+) low level signal 18 Yellow Left Rear (+) low level signal 19   NOT USED 20

Tundra Audio System diagrams.

Sequoia Audio System diagrams.

10 Speaker System - Part 1


10 Speaker System - Part 2

6 Speaker System

Toyota Radio, Stereo and Compact Disc Diagnostic Trouble Codes.

What size aftermarket head unit will fit in the Tundra and Sequoia?

When installing smaller sized head units, a pocket or faceplate can be used to fill the remainder of the dash opening.

How to remove the factory head unit from your Tundra.

Does the factory head unit have preamp outputs?

Does the factory head unit have preamp inputs?

How to add preamp outputs to the factory head unit in a Tundra.

The external amp must be left in place to feed the power connections to the head unit. On the Toyota audio systems with an external amplifier, the main harness connections, connect to the external amplifier. A pig-tail witha 20-pin connector runs from the amplifier to the head unit. This pigtail harness contains the following wires:

Pin Layout:

20-Pin Connector, picture courtesy of
TundraSolutions.com member tundra-gearhead.

For each preamp output pair you want to add to your head unit, you will need a pair of female RCA sockets.

1. Disconnect the negative (-) battery cable.

2. Follow the instructions to remove the factory head unit (Toyota Tundra Factory Stereo Removal).

3. Take the 20-pin connector that plugs into the radio and carefully cut the external covering on the wire harness to expose 2 - 3 inches of the enclosed wires, near the connector.

4. Locate the following wires, which will all be together on one side of the connector :

5. Splice a 18 or 20G Black wire into the White wire (pin 16 on the Connector), leaving it in continuity. This will be the common ground (-) connection for each of the female RCA plug. Make your spliced-in wire long enough so you can tie all the leads from negative leads from the RCA plugs to this wire. Solder and tape or shrink wrap your splice in the White wire.

6. Splice a Red 18 or 20G wire into the Black wire¹ (pin 8 on the connector). Connect the spliced-in wire to the positive lead of one of the female RCA jacks. Connect a short Black 18 or 20G wire to the negative lead on the same RCA jack. This will be the Front Right RCA Jack. Solder and tape or shrink wrap your splice in the Black wire.

Preamp output pair, picture courtesy of
TundraSolutions.com member tundra-gearhead.

7. Splice a White 18 or 20G wire into the Blue wire¹ (pin 9 on the connector). Connect the spliced-in wire to the positive lead of the second female RCA jacks. Connect a short Black 18 or 20G wire to the negative lead on the same RCA jack. This will be the Front Left RCA Jack. Solder and tape or shrink wrap your splice in the Blue wire.

8. Splice a Red 18 or 20G wire into the Green wire¹(pin 18 on the connector). Connect the spliced-in wire to the positive lead of the third the female RCA jacks. Connect a short Black 18 or 20G wire to the negative lead on the same RCA jack. This will be the Rear Right RCA Jack. Solder and tape or shrink wrap your splice in the Green wire.

9. Splice a White 18 or 20G wire into the Yellow wire¹ (pin 19 on the connector). Connect the spliced-in wire to the positive lead of one of the female RCA jacks. Connect a short Black 18 or 20G wire to the negative lead on the same RCA jack. This will be the Rear Left RCA Jack. Solder and tape or shrink wrap your splice in the Yellow wire.

10. Connect all four Black wires from the RCA jacks to the Black wire you spliced into the harness in step 5. Solder and tape or shrink wrap; or secure with a wire nut and tape.

11. Check all your connections. wrap the harness back up with electrical tape.

12. Plug RCA interconnects into your new RCA jacks and connect to the appropriate connections on your aftermarket amplifier(s). Connect your speakers to your aftermarket amplifiers.

13. Reconnect and re-install the radio. Reconnect the connections to the integration panel. Reconnect the battery cable.

14. Test. Complete re-assembly.

Note: This modification may cause a floating ground loop in the audio system causing some noise. Any noise induced shouldbe able to be resolved with a Ground Loop Isolator. Ground Loop Isolators can be purchased from Radio Shack (PN #27-054) or from Parts Express (PN #265-012)

¹ You can either cut these wires or leave them in continuity. If you cut them there will be NO low-level signal passed from the head unit to the factory amplifier. If you leave them in continuity, you will need to make sure that the factory amplifier is NOT connected to the speakers. However, be aware that leaving them in continuity may induce some noise in the system and cause a voltage drop at the preamp output jacks.

(Courtesy of TundraSolutions.com member tundra-gearhead)

How to keep the Toyota factory head unit and add an aftermarket amplifier.

Where can I install an aftermarket amplifier in my Tundra?

There is room for a 14" x 14" x 2 3/4" amp under the passenger side captain's chair and room for a 9 1/2" x 16" x 4" amp in the storage compartment under the passenger side rear seat.

Mounting equipment behind the rear seat in the Toyota Tundra.

What wire can I use for a remote turn-on signal for an aftermarket amplifier?

Picture courtesy of TundraSoultions.com
member tundra-gearhead.

Toyota Audio System Technical Service Bulletins.