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Which wires give constant, ignition and ground on a 2016 Toyota Tundra?
On a 2016 Toyota Tundra, take constant power from the Black wire at the dash fuse box, white 1-pin plug, pin 1, ignition from the Black wire at the ignition switch, white 8-pin plug, pin 6, and ground to clean, bare body metal. Meter every wire first.
Written by API Signal, fleet GPS and camera installers for 35+ years across Georgia, South Carolina and North Carolina, installing every major telematics and camera brand. Every wire on this page lists its source.
Test every wire with a meter before you tap it
No wiring information is ever guaranteed. Colors and locations change with trim, options and build date, and the manufacturer can change them in the middle of a model year. We share this as a starting point for installers, and you are responsible for confirming every connection on the truck in front of you.
This page covers the 2016 Toyota Tundra.
This truck has a G-key. The ignition switch colors come from a 2016 install post. Nobody has posted the body wires for 2016 or 2017, so we show the 2015 and 2018 colors side by side. No Toyota wiring diagram was available to us, so every color here is installer-reported. Our own team has not yet metered these on a 2016 truck.
OBD-II portUnder the driver dash, white plug above the brake pedal
Best power spotDash fuse box and ignition switch
System voltage12V
Ignition typeG-key
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Where do I get constant, ignition and ground on a 2016 Toyota Tundra?
Take constant, ignition and ground from the same area.
Option 1 Easiest
Ignition switch and dash fuse box
Both under the driver side dash, close together.
Constant
Black
Dash fuse box, white 1-pin plug, pin 1Always hot, 140A or 150A. The thick Black wire. The plug is lettered (A) or (DA).
Ignition
Black
Ignition switch, white 8-pin plug, pin 6Hot in run. Light Green on pin 1 is the second ignition wire.
Ground
Body ground
Body metal under the dashClean, bare metal only. Never the battery negative post. No source named a factory ground bolt.
Accessory
Gray
Ignition switch, white 8-pin plug, pin 2Hot in accessory and run.
The starter is Green on pin 7. Never tap the starter. The switch wires are thin, so use the Black fuse box wire for anything that draws real current.
Option 2 Dash cam
Fuse tap
Add-a-fuse taps for a dash cam.
Accessory
Fuse tap
Dash fuse box, ACC fuseHot in accessory and run. We have no fuse list for this year, so read the lid label and meter the slot.
Ground
Body ground
Body metal under the dashClean, bare metal only. Never the battery negative post. No source named a factory ground bolt.
We found a fuse list only for 2007 to 2013 trucks. Read the lid label and meter the slot first.
Ignition switch colors from a 2016 Tundra install post on the12volt; they match 2014 and 2018. The constant is the thick Black wire at the dash fuse box on both older and newer trucks.
What are the turn signal, reverse and light wires on a 2016 Toyota Tundra?
Circuit
Wire color
Location and what it does
Left turnPositive +Not yet checked
Green front (2015 layout)
Black rear (2015 layout)
Black front (2018 layout)
Yellow rear (2018 layout)
Older trucks: flasher relay, white 18-pin, pins 10 and 2. Newer trucks: driver kick gray 12-pin pin 11, and dash fuse box 3H pin 8We found no 2016 or 2017 sheet for this wire. Both known layouts are shown; check which plug your truck has, then meter it.
Right turnPositive +Not yet checked
Beige front (2015 layout)
Light Blue rear (2015 layout)
Pink front (2018 layout)
Green rear (2018 layout)
Older trucks: flasher relay, pins 17 and 8. Newer trucks: passenger kick white 20-pin pin 11, and dash fuse box 3H pin 6Not confirmed for 2016 or 2017. Meter it.
Park lightPositive +Not yet checked
Light Green (2015 layout)
Violet (2018 layout)
Dash fuse box: 24-pin (DB) pin 8, or 32-pin (3H) pin 32Not confirmed for 2016 or 2017. Go by the plug your truck has.
HeadlightNegative -Not yet checked
White (2010 sheet)
Green (2018 sheet)
Headlight switchNot confirmed for 2016 or 2017. Meter it.
ReversePositive +Not yet checked
Blue
Passenger kick, white 20-pin plug, pin 20Hot in reverse. The same wire on the 2014, 2018 and 2021 sheets, so it very likely carries through.
Dome lightNegative -Not yet checked
Blue
Interior light switch on the dash, black 12-pin plug, pin 11Dome light supervision. The same on 2012 to 2021 sheets.
Each chip shows the main insulation color with its stripe. Sources: a 2014 Tundra wire sheet on the12volt (Directed data) and a 2014 install post and a 2018 Tundra H-key wire sheet on the12volt.
Where are the brake, door, speed and CAN wires on a 2016 Toyota Tundra?
Circuit
Wire color
Location and what it does
BrakePositive +Not yet checked
Beige / Tan
Brake switch, white 4-pin plug, pin 1Hot with the pedal pressed. Same color and pin on the 2014 and 2018 sheets.
DoorsNegative -Not yet checked
Gray (driver)
Body ECU on the dash fuse box: white 26-pin pin 24 (2015 layout) or white 30-pin pin 6 (2018 layout)Grounds when the driver door is open. Gray on both layouts; go by the plug.
Parking brakeNegative -Not yet checked
Beige / Tan
Dash fuse box: 24-pin (DB) pin 11, or 32-pin (3H) pin 18Grounds with the parking brake set. Same color both layouts, different plug.
HazardNegative -Not yet checked
Beige (2015 layout)
Blue (2018 layout)
Body ECU 16-pin pin 4, or A/C control black 8-pin pin 1Not confirmed for 2016 or 2017. Meter it.
Hood pinNegative -Not yet checked
Purple (2015 layout)
Red (2018 layout)
Body ECU: 26-pin pin 16, or 30-pin pin 11Not confirmed for 2016 or 2017.
SeatbeltNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Vehicle speedAC signalNot yet checked
White (2010 sheet)
Light Green (2018 sheet)
Radio plugNot confirmed for 2016 or 2017. Meter it.
TachAC signalNot yet checked
Brown (2014 sheet)
Light Green (2018 sheet)
OBD port, pin 9The pin is the same from 2008 to 2018; only the reported color changes.
CAN busDataNot yet checked
Blue (high, 2018 sheet)
White (low)
OBD port, pin 6 and pin 14Never cut or splice them.
Sources: a 2016 Tundra install post on the12volt, a 2014 Tundra wire sheet on the12volt (Directed data) and a 2014 install post and a 2018 Tundra H-key wire sheet on the12volt (installer-reported). No Toyota wiring diagram was available. Park/neutral and seatbelt were not found.
Which years share wiring with the 2016 Toyota Tundra?
This page2016Ignition switch confirmed; body wires not confirmed.
Same wiring2017Both years use the G-key ignition switch colors from the 2016 post. The body wires are not confirmed for either year.
Where are the fuse boxes and ground points on a 2016 Toyota Tundra?
InteriorDriver side, under the dashThe Body ECU is attached to this box. We have no fuse list for this year.
Under the hoodEngine bay fuse boxCheck the lid label for the fuse names.
Ground pointsClean body metalNo named ground point found. Use clean, bare body metal, never the battery negative post.
Locations from installer sheets. We found a fuse list only for 2007 to 2013 and 2018 to 2021 trucks.
Where is the OBD-II port on a 2016 Toyota Tundra?
OBD II
Diagnostic portOBD-II port: under the driver dash, white plug above the brake pedalPlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Common questions about 2016 Toyota Tundra wiring
What wire is constant power on a 2016 Toyota Tundra?
Black at the dash fuse box, white 1-pin plug, pin 1. Always hot, 140A or 150A. Meter it before you tap it.
What wire is ignition on a 2016 Toyota Tundra?
Black at the ignition switch, white 8-pin plug, pin 6. Hot in run. Meter it before you tap it.
Where is the reverse wire on a 2016 Toyota Tundra?
Blue (positive +) at the passenger kick, white 20-pin plug, pin 20. Hot in reverse. Meter it before you tap it.
Where is the brake wire on a 2016 Toyota Tundra?
Beige / Tan (positive +) at the brake switch, white 4-pin plug, pin 1. Hot with the pedal pressed. Meter it before you tap it.
Where is the parking brake wire on a 2016 Toyota Tundra?
Beige / Tan (negative -) at the dash fuse box: 24-pin (DB) pin 11, or 32-pin (3H) pin 18. Grounds with the parking brake set. Meter it before you tap it.
Where is the vehicle speed signal on a 2016 Toyota Tundra?
White (2010 sheet) and Light Green (2018 sheet) at the radio plug. Not confirmed for 2016 or 2017. Meter it before you tap it.
Which years share wiring with the 2016 Toyota Tundra?
2017. Both years use the G-key ignition switch colors from the 2016 post.
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