2012 Ram 4500 Electrical Parts

This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator. Read more

26 Alternator / Generator parts for the 2012 Ram 4500 come from 11 brands — REMY, TERREPOWER, PURE ENERGY and 8 other brands. The "Popular" part is MOPAR 4801313AD. Grades run from New through Remanufactured; Remanufactured is the most populated section, led by REMY, TERREPOWER, ACDELCO and 5 other brands.

This table covers the pulleys on the alternator shaft. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

2 Alternator / Generator Pulley parts are listed for the 2012 Ram 4500, from DORMAN and INA.

Part numbers include DORMAN 300435 and INA EA0262.

This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery. Read more

7 Battery parts are listed for the 2012 Ram 4500, from DEKA, ACDELCO, BOSCH and 3 other brands. DEKA 9A48 carries the "Popular" badge.

The AGM (Extended Life) section lists 6 options from DEKA, ACDELCO, BOSCH and 2 other brands — grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. DEKA 9A48 is listed in this group.

The Performance AGM (Extended Life + Increased Power) section lists 1 option from FULLRIVER — grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. FULLRIVER FT85094R is listed in this group.

This group includes DEKA 9A48, DEKA 9A94R and ACDELCO 94RAGM and the remaining parts above.

This table covers the positive and ground cables that run from the battery. Typical signs include a stretched or frayed cable, or a control that no longer reaches the end of its travel. Route the new cable through the same clips. A kinked cable binds and fails early. Read more

4 Battery Cable parts for the 2012 Ram 4500 come from MOPAR.

Listed part numbers: MOPAR 5148506AC, MOPAR 5148507AB and MOPAR 56043290AA, plus the other parts above.

This table covers the Battery Heat shields. Typical signs include a bent shield rubbing a rotor, or rust-through that leaves the backing open. A rubbing shield will eat a new rotor. Straighten or replace it before the wheel goes back on. Read more

This group shows a single part: MOPAR 5033395AC.

This table covers the trays the battery sits in. Read more

One part is listed for the 2012 Ram 4500 — MOPAR 55372563AB.

This table covers the resettable circuit breakers in this vehicle's electrical system. Read more

One part is listed for the 2012 Ram 4500 — MOPAR 4692143AA.

This table covers the Door control modules. Read more

MOPAR supplies both parts for the 2012 Ram 4500.

Part numbers include MOPAR 4602911AK and MOPAR 4602910AK.

This table covers the replacement fuses for this vehicle's fuse boxes. Typical signs include one circuit dead while its neighbor still works, or a fuse that blows again as soon as you replace it. Match amperage and fuse type. A repeat blow means a short — find it before the next fuse. Read more

MOPAR supplies the 4 Fuse parts for the 2012 Ram 4500.

The 10 Amp section lists 1 option from MOPAR — grouped under the catalog's "10 Amp" designation — the notes column spells out what sets them apart. MOPAR 6101486 is listed in this group.

In the 15 Amp grade, MOPAR supplies 1 part: grouped under the catalog's "15 Amp" designation — the notes column spells out what sets them apart. A representative part number is MOPAR 6101487.

In the 20 Amp grade, MOPAR supplies 1 part: grouped under the catalog's "20 Amp" designation — the notes column spells out what sets them apart. A representative part number is MOPAR 6101488.

The 25 Amp section lists 1 option from MOPAR — grouped under the catalog's "25 Amp" designation — the notes column spells out what sets them apart. MOPAR 4687835 is listed in this group.

This group includes MOPAR 6101486, MOPAR 6101487 and MOPAR 6101488 and the remaining parts above.

This table covers the holders that carry a fuse. Read more

One part is listed for the 2012 Ram 4500 — MOPAR 68083377AA.

This table covers the horns mounted in the front of the vehicle. Read more

FIAMM supplies the 13 Horn parts for the 2012 Ram 4500. FIAMM 7210223 carries the "Popular" badge.

In the Accessory Replacement grade, FIAMM supplies 7 parts: grouped under the catalog's "Accessory Replacement" designation — the notes column spells out what sets them apart. A representative part number is FIAMM 7210223.

The Standard Replacement section lists 6 options from FIAMM — built to original-equipment specification. FIAMM 7201223 is listed in this group.

This table covers the receivers that pick up the key-fob unlock signal. Read more

2 Keyless Entry Module / Receiver parts for the 2012 Ram 4500 come from MOPAR.

This group includes MOPAR 68105738AF and MOPAR 68105738AD.

This table covers the key fobs that lock, unlock and start the vehicle. Read more

4 Keyless Entry Remote parts for the 2012 Ram 4500 come from 2 brands — MOPAR and DORMAN.

Part numbers include DORMAN 99360, MOPAR 56046639AG and MOPAR 56046638AF, among others listed above.

This table covers the ultrasonic park-aid sensors in the bumper. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

5 Parking Aid Sensor parts for the 2012 Ram 4500 come from 5 brands — BOSCH, AUTOTECNICA, SKP and 2 other brands. The "Popular" part is BOSCH 0263043552.

Part numbers include BOSCH 0263043552, AUTOTECNICA CY1317815 and SKP SK684007, among others listed above.

This table covers the Power inverters. Read more

This group shows a single part: MOPAR 5082095AB.

This table covers the totally-integrated power modules that distribute body electrical power. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

One part is listed for the 2012 Ram 4500 — MOPAR R8089322AG.

This table covers the speed sensors on the transmission, transfer case or ABS ring. Typical signs include a dead speedometer, harsh transmission shifts, or a code for vehicle speed. Inspect the tone wheel and the connector before replacing the sensor. Read more

7 Speed Sensor parts are listed for the 2012 Ram 4500, from ULTRA-POWER, STANDARD MOTOR PRODUCTS, BECK/ARNLEY and 2 other brands. ULTRA-POWER 5S6546 carries the "Popular" badge.

In the Economy grade, ULTRA-POWER and BECK/ARNLEY supply 3 parts: the catalog's value-priced group. A representative part number is ULTRA-POWER 5S6546.

The Standard Replacement section: 4 options from STANDARD MOTOR PRODUCTS, WELLS and MOPAR. WELLS 5S6546 is listed in this group.

Listed part numbers: ULTRA-POWER 5S6546, BECK/ARNLEY 0900013 and ULTRA-POWER SC658, plus the other parts above.

This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

11 Starter Motor parts for the 2012 Ram 4500 come from 9 brands — WAI GLOBAL, TERREPOWER, ACDELCO and 6 other brands. The "Popular" part is WAI GLOBAL 19029N.

The New section lists 2 options from WAI GLOBAL and TERREPOWER — brand-new units rather than rebuilt ones. WAI GLOBAL 19029N is listed in this group.

The Remanufactured section lists 9 options from ACDELCO, PURE ENERGY, BOSCH and 6 other brands — factory-rebuilt units with new wear components. ACDELCO 3362181 is listed in this group.