Where is the Ram 1500 battery?

The manual says the battery is located in the front of the engine compartment, behind the driver side headlight assembly. If equipped, the positive (+) battery post may be covered with a protective cap; lift up on the cap to reach it.

Trucks with the Stop/Start system are equipped with two batteries. The manual warns that both the main and the supplemental batteries must be disconnected to completely de-energize the 12 volt electrical system, that serious injury or death could result if you do not disconnect both, and to see an authorized dealer to learn how to disconnect them properly.

Trucks equipped with eTorque also have a heavy-duty motor generator and an additional hybrid electric battery that stores energy from deceleration, used for engine startup after a stop and for torque assist.

From the 2026 Ram 1500 owner's manual (Preparations For Jump Start; Stop/Start System), read November 8, 2026.

How to jump start a Ram 1500

Before you jump start, the manual warns: do not attempt it if the battery is frozen, because it could rupture or explode; do not use a booster battery, portable booster pack or other source with a system voltage greater than 12 volts; keep flames and sparks away from the battery; and do not let the vehicles touch each other.

The manual adds: do not jump off fuses; only jump directly off the positive post, which has a positive (+) symbol on or around it. To prepare:

1. Shift the automatic transmission into PARK, apply the parking brake and turn the ignition OFF.
2. Turn off the heater, radio and all electrical accessories.
3. If you are using another vehicle, park it within the jumper cables' reach, apply its parking brake and make sure its ignition is OFF.
4. Pull upward and remove the protective cover over the positive (+) battery post.

To connect the cables: connect the positive (+) cable to the positive (+) post of the discharged truck, then to the positive (+) post of the booster battery; connect the negative (-) cable to the negative (-) post of the booster battery, then to a good engine ground on the truck, an exposed unpainted metal part of the engine, frame or chassis, such as an accessory bracket or large bolt, away from the battery and the fuel injection system. The manual warns not to connect the jumper cable to the negative (-) post of the discharged battery, because the resulting spark could cause the battery to explode. Do not connect a jumper cable to any of the fuses on the positive battery terminal; the current will blow the fuse. Start the booster vehicle, let it idle a few minutes, then start the Ram. Once the engine is started, disconnect the cables in the reverse order and reinstall the protective cap. If you need frequent jump starts, the manual says to have the battery and charging system inspected at an authorized dealer.

From the 2026 Ram 1500 owner's manual (Jump Starting: Preparations For Jump Start; Jump Starting Procedure), read November 8, 2026.

Battery warning light and Battery Saver message

The Battery Charge Warning Light comes on when the battery is not charging properly. If it stays on while the engine is running, there may be a malfunction with the charging system; the manual says to contact an authorized dealer as soon as possible, because it indicates a possible problem with the electrical system or a related component.

Equipped trucks have an Intelligent Battery Sensor (IBS). If it detects a charging system failure or deteriorating battery conditions while the engine is running, it reduces power to or turns off non-essential electrical loads, such as heated or vented seats, the rear defroster and heated mirrors, the HVAC system, the 115 volt power inverter and the audio and telematics system. The message Battery Saver On Some Systems May Have Reduced Power then appears in the instrument cluster.

The manual lists possible causes of lost battery charge, including electrical loads larger than the charging system can supply, turning on every possible load during city driving, towing or frequent stopping, added aftermarket lights or accessories, short trips separated by long parking periods, a truck parked for weeks or months, or a battery that was recently replaced and not fully charged.

From the 2026 Ram 1500 owner's manual (Battery Charge Warning Light; Battery Saver On/Battery Saver Mode Message), read November 8, 2026.

Ram 1500 battery care

The manual's once-a-month or before-a-long-trip checklist includes checking the 12V battery terminals, cables and connections.

To protect the battery, interior and exterior lights run on timers: after 10 minutes with the vehicle OFF and a door left open or the dimmer control rotated all the way up, the interior lights turn off, and the headlights turn off automatically after eight minutes with the vehicle in the OFF position.

Accessories plugged into the power outlets draw power from the battery even when not in use. If they stay plugged in long enough without the engine running, the battery can discharge enough to degrade battery life or prevent the engine from starting.

The owner's manual sections used for this guide do not list a replacement battery size or rating, so check the battery on your vehicle or ask our service department.

From the 2026 Ram 1500 owner's manual (Scheduled Servicing; Battery Saver; Jump Starting), read November 8, 2026.

Ram 1500 battery service at Elgin CDJR

Battery tests are among the services listed on our service center pages. Our service department is open Monday to Friday 7 a.m. to 7 p.m. and Saturday 7:30 a.m. to 4 p.m., and is closed Sunday. Elgin CDJR is at 1500 W. Lake St. in Streamwood. Get directions.