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Which wires give constant, ignition and ground on a 2016 Ram ProMaster City?
On a 2016 Ram ProMaster City, take constant power from the Red/Green wire at the ignition switch, black 3-pin plug, pin 2, ignition from the Dark Blue wire at the ignition switch, black 2-pin plug, pin 2, 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 Ram ProMaster City.
This van has a standard key. Three sources agree on the ignition switch wires. The body wires come from a 2021 wire sheet and are carried back to this year, so meter them. Our own team has not yet metered these on a 2016 van.
OBD-II portLower edge of the dash, beside the steering column
Best power spotIgnition switch plugs
System voltage12V
Ignition typeKey
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Where do I get constant, ignition and ground on a 2016 Ram ProMaster City?
Take constant, ignition and ground from the same area.
Option 1 Easiest
Ignition switch plugs
Steering column. Two small black plugs, a 3-pin and a 2-pin. Key start on every year.
Constant
Red/Green
Ignition switch, black 3-pin plug, pin 2Always hot, 20A. Sources call the stripe Green, Dark Green or Light Green, all on the same pin.
Ignition
Dark Blue
Ignition switch, black 2-pin plug, pin 2Hot in run. Orange on the 3-pin plug, 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 point.
Accessory
Gray
Ignition switch, black 2-pin plug, pin 1Hot in accessory and run.
The starter is White/Red on the 3-pin plug, pin 3. Never tap the starter. Three sources agree on these pins.
Option 2 Factory option BC3
Upfitter plugs
Behind the driver side knee panel, if the van was ordered with the upfitter connector.
Constant
Red
Upfitter 2-pin power plug, pin 1Always hot, fused at 50A. Only on vans built with the upfitter option.
Ignition
Blue/Yellow
Upfitter 15-pin plug, pin 13Hot in run. Ram limits it to 600 mA, so use it as a sense wire or for a tracker, not a heavy load.
Ground
Black
Upfitter 2-pin power plug, pin 2Factory power ground.
From Ram's upfitter connector instruction sheet, dated 2018. It prints no model years. Ram says this option cannot be added later, so many vans will not have these plugs.
Ignition switch colors from the iDatalink install guide for 2015 to 2021, Directed's 2015 to 2016 guide and a 2021 ProMaster City wire sheet on the12volt.
What are the turn signal, reverse and light wires on a 2016 Ram ProMaster City?
Circuit
Wire color
Location and what it does
Left turnPositive +Not yet checked
Dark Blue/White (front)
Dark Blue/White (rear)
BCM at the dash fuse box: black 60-pin plug, pin 10 (front); the other 60-pin plug, pin 1 (rear)Flashes with the left signal. From a 2021 sheet, carried back to this year. Meter it.
Right turnPositive +Not yet checked
Dark Blue/Black (front)
Dark Blue/Black (rear)
BCM: black 60-pin plug, pin 8 (front); the other 60-pin plug, pin 3 (rear)Flashes with the right signal. From a 2021 sheet, carried back to this year. Meter it.
Park lightNegative -Not yet checked
Green/Black
Headlight switch, black 10-pin plug, pin 3Park light switch wire, grounds with the lights on. Three sources agree for 2015 to 2021. The 2021 sheet also gives positive rear outputs at the BCM: Yellow/Red (left, pin 6) and Yellow/Black (right, pin 5).
HeadlightNegative -Not yet checked
Green/White (high beam)
Headlight switch, black 10-pin plug, pin 2The sheet labels this wire high beams. No low beam wire was found. From a 2021 sheet, carried back to this year. Meter it.
ReversePositive +Not yet checked
Gray/Green
BCM, 60-pin plug (plug color not given), pin 44Hot in reverse. From a 2021 sheet, carried back to this year. Meter it. A 2017 owner post gives Gray/Light Green and White/Light Green on a different plug, so meter it.
Dome lightNegative -Not yet checked
Gray/Dark Blue
BCM, 60-pin plug (plug color not given), pin 9Dome light supervision. From a 2021 sheet, carried back to this year. Meter it.
Each chip shows the main insulation color with its stripe. Source: a 2021 ProMaster City wire sheet on the12volt.
Where are the brake, door, speed and CAN wires on a 2016 Ram ProMaster City?
Circuit
Wire color
Location and what it does
BrakePositive +Not yet checked
Green/Black
BCM, black 60-pin plug, pin 34Hot with the pedal pressed. The park light switch wire is the same color at the headlight switch, so go by location. From a 2021 sheet, carried back to this year. Meter it.
DoorsNegative -Not yet checked
White/Violet (left front)
White/Red (right front)
White/Violet (left rear)
White/Green (right rear)
White/Gray (rear cargo doors)
BCM: black 60-pin plug, pins 54 and 53; the other 60-pin plug, pins 40, 56 and 39Each grounds when its door is open. iDatalink calls pin 40 the trunk wire, Purple/White, so test each door. From a 2021 sheet, carried back to this year. Meter it.
Parking brakeNegative -Not yet checked
White/Yellow
BCM, 60-pin plug (plug color not given), pin 19Grounds with the parking brake set. From a 2021 sheet, carried back to this year. Meter it.
HazardNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Lock / unlockPolarity: meter itNot yet checked
Violet/Red
BCM, black 60-pin plug, pin 51One wire carries both lock and unlock, coded by resistance. Three sources agree for 2015 to 2021.
SeatbeltNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Vehicle speedAC signalNot yet checked
Brown/Light Green
Upfitter 15-pin plug behind the driver knee panel, pin 3 (factory option BC3 only)A 0 to 5V square wave. Ram gives speed in mph as the frequency in Hz times 0.6. Vans without the upfitter option have no speed wire that we found.
TachAC signalNot yet checked
Brown/Yellow
Brown/Blue
Brown/Tan
Any fuel injector, black 2-pin plug, pin 1Engine speed signal. Each injector uses one of these colors. From a 2021 sheet, carried back to this year. Meter it.
CAN busDataNot yet checked
Green (high)
Brown (low)
OBD port, pin 6 and pin 14iDatalink and Directed agree for 2015 to 2017 (Directed calls the high wire Light Green). Never cut or splice them.
Sources: a 2021 ProMaster City wire sheet on the12volt, the iDatalink install guide for 2015 to 2021, Directed's guide for 2015 to 2016 and Ram's upfitter connector instruction sheet (a Ram document). The body wires rest on one installer sheet. Hazard, park/neutral, seatbelt, the brake switch wire at the pedal and a low beam wire were not found.
Which years share wiring with the 2016 Ram ProMaster City?
This page2016Ignition switch confirmed for this year; body wires carried from 2021.
Same wiring2015 and 2017iDatalink puts 2015 to 2017 on one install type, and Directed matches it for 2015 and 2016. CAN is at the OBD port on these years.
Not this page2018 and newerSame ignition switch colors, but a security gateway moves the CAN tap to the BCM.
Where are the fuse boxes and ground points on a 2016 Ram ProMaster City?
InteriorDriver side, under the dashThe fuse panel is part of the BCM. F36 feeds the OBD port and radio (constant). F37 (5A) and F51 (7.5A) are ignition. Never tap F50, the airbag fuse.
Under the hoodNext to the batteryDash power outlet F86 (15A) and rear outlet F85 (15A) switch with the key. F30 is the fog lamp on this year, not an outlet.
BatteryFront of the engine bay, behind the left headlightThe positive post has a protective cap. Use clean body metal for ground, never the battery negative post.
Locations from Ram's owner's manual (2016 and 2021 editions). Fuse numbers from a fuse guide that matches the manual pages we could read. Check the lid label before you use a slot.
Where is the OBD-II port on a 2016 Ram ProMaster City?
OBD II
Diagnostic portOBD-II port: lower edge of the dash, beside the steering columnPlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Common questions about 2016 Ram ProMaster City wiring
What wire is constant power on a 2016 Ram ProMaster City?
Red/Green at the ignition switch, black 3-pin plug, pin 2. Always hot, 20A. Meter it before you tap it.
What wire is ignition on a 2016 Ram ProMaster City?
Dark Blue at the ignition switch, black 2-pin plug, pin 2. Hot in run. Meter it before you tap it.
Where is the reverse wire on a 2016 Ram ProMaster City?
Gray/Green (positive +) at the BCM, 60-pin plug (plug color not given), pin 44. Hot in reverse. Meter it before you tap it.
Where is the brake wire on a 2016 Ram ProMaster City?
Green/Black (positive +) at the BCM, black 60-pin plug, pin 34. Hot with the pedal pressed. Meter it before you tap it.
Where is the parking brake wire on a 2016 Ram ProMaster City?
White/Yellow (negative -) at the BCM, 60-pin plug (plug color not given), pin 19. Grounds with the parking brake set. Meter it before you tap it.
Where is the vehicle speed signal on a 2016 Ram ProMaster City?
Brown/Light Green at the upfitter 15-pin plug behind the driver knee panel, pin 3 (factory option BC3 only). A 0 to 5V square wave. Meter it before you tap it.
Which years share wiring with the 2016 Ram ProMaster City?
2015 and 2017. iDatalink puts 2015 to 2017 on one install type, and Directed matches it for 2015 and 2016.
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