2021 RAM 1500 wiring

440SERVICING AND MAINTENANCE
4. Reach behind the headlamp and disengage
the access cover by rotating counter -
clockwise.
5. Disconnect the internal lamp wiring harness connector from the high beam bulb.
6. Rotate the bulb counterclockwise a quarter turn to unlock the bulb from the lamp.
7. Pull the bulb straight out from the housing.
8. Reverse the procedure for installation of new bulb and cover. Front Park And Turn
See below steps to replace:

1. Open the hood.

2. Disconnect and isolate the negative battery
cable.
3. Locate the park and turn socket, which can be found on the back side of the
headlamps.

Park And Turn Socket

4. Reach behind the headlamp and unlock the park and turn socket from the lamp by
rotating counterclockwise a quarter turn.
5. Pull the bulb straight out from the housing. 6. Separate the bulb from the socket without
twisting.
7. Reverse the procedure for installation of new bulb and covers.
Side Marker Lamp
See below steps to replace:

1. Open the hood.

2. Disconnect and isolate the negative battery cable.
3. Locate the side marker lamp, which can be found on the back side of the headlamps.

Side Marker Lamp

CAUTION!
Do not contaminate the bulb glass by
touching it with your fingers or by allowing it
to contact other oily surfaces. Shortened
bulb life will result.
Always use the correct bulb size and type
for replacement. An incorrect bulb size or
type may overheat and cause damage to
the lamp, the bulb socket, or the lamp
wiring.

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SERVICING AND MAINTENANCE441
4. Disengage the side marker socket by
rotating counterclockwise a quarter turn.
5. Pull the socket and bulb straight out from the housing.
6. Separate the bulb from the socket without twisting.
7. Reverse the procedure for installation of new bulb and covers.
Fog Lamps — If Equipped
Please see an authorized dealer for service on
LED and Halogen front fog lamps.
Halogen
See below steps to replace:

1. Reach under and behind the front fascia/ bumper to access the back of the front fog
lamp housing.

2. Disconnect the fog lamp wiring harness connector from the fog lamp bulb.
Fog Lamp Bulb

3. Rotate the bulb counterclockwise a quarter turn to unlock the bulb from the housing.
4. Pull the bulb straight out from the housing.
5. Reverse the procedure to install the bulb and cover. Rear Tail/Stop, Turn Signal And Backup Lamps
See below steps to replace:

1. Remove the two screws and push pins
retainers that pass through the bed sheet
metal.

Tail Lamp Locations

CAUTION!
Do not contaminate the bulb glass by
touching it with your fingers or by allowing it
to contact other oily surfaces. Shortened bulb
life will result.
1 — Tail Lamp
2 — Fasteners
3 — Push - Pin Retainers
8

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442SERVICING AND MAINTENANCE
2. Pull the outboard side of the lamp rearward
far enough to unsnap the two receptacles
on the outboard side of the lamp housing
from the two plastic snap post retainers in
the outer box side panel.

Tail Lamp Removal

3. Disconnect the wiring harness connectors from the bulb socket.

Wiring Harness Connector
4. Rotate the bulb socket counterclockwise a
quarter turn to unlock it from the housing.
5. Pull the bulb straight out of the socket.
6. Reverse the procedure to install the bulb and housing.
Center High Mounted Stop Lamp (CHMSL)
With Cargo Lamp
See below steps to replace:

1. Remove the four screws holding the housing/lens to the body as shown.
CHMSL Mounting Screw Locations

2. Separate the connector holding the housing and wiring harness to the body.

CHMSL Bulb Location

CAUTION!
Do not contaminate the bulb glass by
touching it with your fingers or by allowing it
to contact other oily surfaces. Shortened bulb
life will result.

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491
Tires
................................... 371, 449, 455, 460Aging (Life Of Tires)................................... 452Air Pressure............................................... 449Chains....................................................... 458Compact Spare......................................... 455Dual........................................................... 467General Information........................ 449, 455High Speed................................................ 451Inflation Pressure...................................... 450Life Of Tires............................................... 452Load Capacity............................................ 447Pressure Monitoring System (TPMS)........................................ 131, 327Quality Grading.......................................... 460Radial........................................................ 451Replacement............................................. 453Rotation.................................................... 460Safety.............................................. 443, 449Sizes.......................................................... 444Snow Tires................................................. 454Spare Tires...................................... 455, 456Spinning.................................................... 452Trailer Towing............................................ 222Tread Wear Indicators............................... 452Wheel Nut Torque..................................... 467To Open Hood.................................................. 84Tongue Weight/Trailer Weight....................... 219Tonneau Cover....................................... 97, 462Tonneau Cover Cleaning................................ 462
Towing................................................. 214, 392Disabled Vehicle....................................... 392Guide........................................................ 218Recreational............................................. 230Weight...................................................... 218Towing Behind A Motorhome........................ 230Traction......................................................... 234Traction Control............................................ 318Trailer Reverse Steering Control................... 219Trailer Sway Control (TSC)............................. 318Trailer Towing............................................... 214Hitches..................................................... 218Minimum Requirements........................... 221Mirrors......................................................... 48Tips........................................................... 227Trailer And Tongue Weight........................ 219Wiring....................................................... 225Trailer Towing Guide..................................... 218Trailer Weight................................................ 218Transfer Case............................................... 427Electronically Shifted....................... 161, 163Fluid......................................................... 478Transmission................................................ 156Automatic........................................ 156, 426Fluid......................................................... 478Maintenance............................................ 426Shifting..................................................... 154Transporting Pets.......................................... 369Tread Wear Indicators.................................. 452Turn Signals......................... 55, 136, 439, 441
U
UconnectPhone Call Features
................................. 276Things You Should Know About Your Uconnect Phone................................... 279Uconnect App................................................ 284Uconnect Phone................................... 272, 273Answer Or Ignore An Incoming Call — Call Currently In Progress..................... 278Answer Or Ignore An Incoming Call — No Call Currently In Progress................ 277Bluetooth Communication Link................ 281Call Continuation...................................... 279Call Controls............................................. 277Call Termination....................................... 279Cancel Command..................................... 273Connecting To A Particular Mobile Phone Or Audio Device After Pairing................ 275Help Command......................................... 273Join Calls.................................................. 279Making A Phone Or Audio Device AFavorite................................................ 275Making A Second Call While Current Call Is In Progress........................................ 278Managing Your Favorites.......................... 276Natural Speech......................................... 272Operation.................................................. 272Overview................................................... 27111

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