2021 RAM 1500 Classic Fuses

The 2021 RAM 1500 Classic is powered by a complex network of electrical systems. Fuses stand guard over these systems, making sure nothing goes wrong with the electricity. These simple parts are very important to the vehicle’s operation because they stop the flow of electricity when there is an overload or short circuit. The RAM 1500 Classic has two main fuse boxes. One is in the engine area, and the other is in the cabin. The fuse box in the engine compartment holds fuses for important engine parts, while the fuse box in the cabin holds fuses for interior features and accessories. A blown fuse can be seen by looking at the indicator window, which often shows a broken wire or a change in color. The door of the fuse box has a clear diagram that helps drivers figure out which fuse goes with which electrical part. This makes troubleshooting easier.

FUSES

General Information

WARNING

• When replacing a blown fuse, always use an appropriate replacement fuse with the same amp rating as the original fuse. Never replace a fuse with another fuse of higher amp rating. Never replace a blown fuse with metal wires or any other material. Do not place a fuse inside a circuit breaker cavity or vice versa. Failure to use proper fuses may result in serious personal injury, fire and/or property damage.
• Before replacing a fuse, make sure that the ignition is off and that all the other services are switched off and/or disengaged.
• If the replaced fuse blows again, contact an authorized dealer.
• If a general protection fuse for safety systems (air bag system, braking system), power unit systems (engine system, transmission system) or steering system blows, contact an authorized dealer.

CAUTION: If it is necessary to wash the engine compartment, take care not to directly hit the fuse box, and the windshield wiper motors with water.

The fuses protect electrical systems against excessive current. When a device does not work, you must check the fuse element inside the blade fuse for a break/melt. Also, please be aware that using power outlets for extended periods of time with the engine off may result in vehicle battery discharge.

1. Fuse Element
2. Blade Fuse with a good/functional fuse element
3. Blade fuse with a bad/not functional fuse element (blown fuse)

Power Distribution Center

The Power Distribution Center is located in the engine compartment near the battery. This center contains cartridge fuses, micro fuses, relays, and circuit breakers. A description of each fuse and component may be stamped on the inside cover, otherwise the cavity number of each fuse is stamped on the inside cover that corresponds to the following chart.

Cavity	Cartridge Fuse	Micro Fuse	Description
* If Equipped
F01	80 Amp Black	–	Rad Fan PWM *
F02	–	–	Spare
F03	60 Amp Yellow	–	Rad Fan HI/LO *
F04	–	–	Spare
F05	40 Amp Green	–	Air Suspension Comp
F06	40 Amp Green	–	ABS Pump Mtr
F07	40 Amp Green	–	Starter Solenoid
F08	20 Amp Blue	–	NOX Sensor *
F09	40 Amp Green	–	Diesel Fuel Heater *
F10	40 Amp Green	–	CBC #2/EXT Light *
F10	50 Amp Red	–	With Start/Stop *
F11	30 Amp Pink	–	ITBM/TRLR Tow Brake *
F12	40 Amp Green	–	CBC #3/PWR Locks *
F13	40 Amp Green	–	HVAC BLWR MTR
F14	40 Amp Green	–	CBC #4/EXT Light *
F15	–	–	Spare
F16	30 Amp Pink	–	Smartbar *
F17	–	–	Spare
F18	–	–	Spare

F19	20 Amp Blue 30 Amp Pink	–	Diesel SCR Feed * HD Diesel *
F20	30 Amp Pink	–	Pass Door Mod
F21	30 Amp Pink	–	DTCM
F22	20 Amp Blue 30 Amp Pink	–	ECM HD Diesel *
F23	30 Amp Pink	–	CBC #1/INT Light
F24	30 Amp Pink	–	Driver Door Mod
F25	30 Amp Pink	–	FT Wiper
F26	30 Amp Pink	–	ABS/BSM ECU/ Valves
F27	–	–	Spare
F28	20 Amp Blue	–	TRLR Tow B/U *
F29	20 Amp Blue	–	TRLR Tow Park *
F30	30 Amp Pink	–	TRLR Tow*
F31	30 Amp Pink	–	DSL HTR Control *
F32	–	–	Spare
F33	20 Amp Blue	–	Trans *
F34	30 Amp Pink	–	VSIM #2 *
F35	30 Amp Pink	–	Sunroof *
F36	30 Amp Pink	–	EBL *

F37	30 Amp Pink	–	Diesel Frame/Fuel HTR *
F38	30 Amp Pink	–	Power Inverter *
F39	–	–	Spare
F40	–	–	Spare
F41	–	10 Amp Red	Act Grille Shutter *
F42	–	20 Amp Yellow	Horn
F43	–	–	Spare
F44	–	10 Amp Red	Diagnostic Port
F45	–	–	Spare
F46	–	10 Amp Red	Upfitters *
F47	–	–	Spare
F48	–	–	Spare
F49	–	10 Amp Red	ICS/HVAC
F50	–	20 Amp Yellow	Air Suspension Control Mod
F51	–	10 Amp Red	Ign Mod
F52	–	5 Amp Tan	Batt Snsr
F53	–	20 Amp Yellow	TRLR Tow– Lt Turn/Stop *
F54	–	20 Amp Yellow	Adj Pedals *
F55	–	–	Spare
F56	–	15 Amp Blue	Add Diesel Content *

F57	–	20 Amp Yellow	Transmission
F58	–	–	Spare
F59	–	10 Amp Red	SCR RLY*
F60	–	15 Amp Blue	UNDRHD Lamp/TCM
F61	–	10 Amp Red	PM/NH3 Sensor*
F62	–	10 Amp Red	A/C Clutch
F63	–	20 Amp Yellow	Ignition Coils
F64	–	25 Amp Clear	Fuel Injectors / PCM
F65	–	–	Spare
F66	–	10 Amp Red	Sunroof / LRSM
F67	–	10 Amp Red	Bluetooth®/CDM *
F69	–	15 Amp Blue	Mod SCR 12V *
F70	–	30 Amp Green	Fuel Pump MTR
F71	–	25 Amp Clear	Amplifier *
F72	–	10 Amp Red	PCM*
F73	–	20 Amp Yellow	Fuel Transfer Pump *
F74	–	20 Amp Yellow	Vac Pump *
F75	–	10 Amp Red	Cool Temp */ SCR RLY *
F76	–	10 Amp Red	BSM/STP LP SW/EPM/ESC*
F77	–	10 Amp Red	DTCM/ELSD/PTU/RDM

F78	–	10 Amp Red	ECM/PCM/EPS
F79	–	15 Amp Blue	ID/Clearance LT
F80	–	10 Amp Red	UGDO/COMP/ITM
F81	–	20 Amp Yellow	Trlr Tow RT Turn / Stop *
F82	–	10 Amp Red	SCCM/Cruise Control
F83	–	–	Spare
F84	–	15 Amp Blue	ICS
F85	–	10 Amp Red	ORC (AIRBAG)
F86	–	10 Amp Red	ORC (AIRBAG)
F87	–	10 Amp Red	Air Susp/ TT/ SCCM
F88	–	15 Amp Blue	IPC
F89	–	–	Spare
F90	–	20 Amp Yellow	Power Outlet RR-BATT
F91	–	–	Power Outlet RR-ACC
F92	–	–	Spare
F93	–	20 Amp Yellow	Cigar Lighter *
F94	–	10 Amp Red	SBW/TCASE SW
F95	–	10 Amp Red	RR Cam/ Park Assist *
F96	–	10 Amp Red	RR Seat Heater SW *
F97	–	25 Amp Clear	Rear HTD STS & HTD STR Wheel *

F98	–	25 Amp Clear	Front HTD STS*
F99	–	10 Amp Red	HVAC/DASM
F100	–	10 Amp Red	Upfitters *
F101	–	–	Spare
F102	–	–	Spare
F103	–	–	Spare
F104	–	20 Amp Yellow	Power Outlets (IP /Console

CAUTION

• When installing the power distribution center cover, it is important to ensure the cover is properly positioned and fully latched. Failure to do so may allow water to get into the power distribution center and possibly result in an electrical system failure.
• When replacing a blown fuse, it is important to use only a fuse having the correct amperage rating. The use of a fuse with a rating other than indicated may result in a dangerous electrical system overload. If a properly rated fuse continues to blow, it indicates a problem in the circuit that must be corrected.

BULB REPLACEMENT

Replacement Bulbs

All of the inside bulbs are brass or glass-wedge base. Aluminum base bulbs are not approved.

Interior Bulbs

Interior Bulbs
Bulb Name	Bulb Number
Overhead Console Lamps	TS 212–9
Dome Lamp	7679
NOTE: For lighted switches, see an authorized dealer for replacement instructions.

Exterior Bulbs

Exterior Bulbs
Bulb Name	Bulb Number
Base Quad Headlamp – Low Beam	H11LL
Base Quad Headlamp – High Beam	9005LL
Front Turn Signal Lamp (Base Quad Headlamp)	3157NA
Premium Bi Halogen Projector Headlamp – Low Beam	9005Sl+
Premium Bi Halogen Projector Headlamp – High Beam	9005LL
Front Turn Signal Lamp (Premium Headlamp)	LED (Serviced at an authorized dealer)
Fog Lamp (Horizontal shape)	9145
Fog Lamp (Vertical shape)	9006
Center High Mounted Stop Lamp (CHMSL)	921K
Rear Cargo Lamp	921

LED Center High Mounted Stop Lamp (CHMSL)/Cargo Lamp	LED (Serviced at an authorized dealer)
Base Rear Tail/Turn and Stop Lamp	3157K
Premium Rear Tail/Turn and Stop Lamp	LED (Serviced at an authorized dealer)
Premium Backup Lamp	7440/W21W
Backup Lamp	921
Rear License Plate Lamp	194

Replacing Exterior Bulbs

BASE QUAD / PREMIUM BI-HALOGEN: LOW BEAM HEADLAMP, HIGH BEAM HEADLAMP, FRONT PARK AND TURN — IF EQUIPPED

See the following steps to replace.

1. Open the hood.
2. Disconnect and isolate the negative battery cable.
3. Remove the six plastic push-in fasteners that secure the upper radiator seal to the grille support and both fender ledges.
4. Remove the two plastic push-in rivets that secure the upper radiator seal to the radiator.
5. Remove the upper radiator seal from the vehicle.
6. Remove the two headlamp assembly attachment screws.
7. Reach into the front wheel house ahead of the front wheel, remove the fastener, and lift the cover over the access hole in the front of the wheel house splash shield. Access to the rear of the lamp can be gained through this access hole.
8. Reach through the access hole of the wheel house splash shield and lift the slide lock upward far enough to disengage it from the lock post on the back of the front lamp unit housing.
9. Remove the headlamp assembly. Grab the outboard edge of the lamp and pull it straight forward to disengage the ball stud from the plastic grommet.
10. Disconnect the wiring harness connectors from the bulb socket.
11. Replace bulb(s) as necessary.

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.

NOTE: There are access covers over both headlamp bulb access holes in the quad front lamp unit housing (if equipped). These covers MUST be reinstalled after the bulb has been replaced.

FOG LAMPS — IF EQUIPPED

See the followingsteps 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.
3. Rotate the bulb counterclockwise a quarter turn to unlock the bulb from the housing.
4. Pull the bulb straight out from the housing.

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.

REAR TAIL / STOP, TURN SIGNAL AND BACKUP LAMPS

See the following steps to replace.

1. Remove the two screws that pass through the bed sheet metal.
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.
3. Disconnect the wiring harness connectors from the bulb socket.
4. Rotate the bulb socket counterclockwise a quarter turn to unlock it from the housing.
5. Pull the bulb straight out of the socket.
   • 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.
6. Reverse the procedure to install the bulb and housing.

CENTER HIGH MOUNTED STOP LAMP (CHMSL) WITH CARGO LAMP

See the following steps to replace.

1. Remove the two screws holding the housing/ lens to the body as shown.
2. Separate the connector holding the housing and wiring harness to the body.
3. Turn the desired bulb socket a quarter turn and remove the socket and bulb from housing.
4. Pull the desired bulb straight from the socket.
   • 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.
   • Outside Bulbs: Cargo Lamps
   • Inside Bulb: Center High Mounted Stop Lamp
5. Reverse the procedure for installation of bulbs and housing.

FAQ