Jeep Wrangler: ENGINE COMPARTMENT / Maintenance-Free Battery

Your vehicle is equipped with a maintenance-free battery. You will never have to add water, and periodic maintenance is not required.

WARNING!

  • Battery fluid is a corrosive acid solution and can burn or even blind you. Do not allow battery fluid to contact your eyes, skin, or clothing. Do not lean over a battery when attaching clamps. If acid splashes in eyes or on skin, flush the area immediately with large amounts of water.
  • Battery gas is flammable and explosive. Keep flame or sparks away from the battery. Do not use a booster battery or any other booster source with an output greater than 12 Volts. Do not allow cable clamps to touch each other.
  • Battery posts, terminals, and related accessories contain lead and lead compounds. Wash hands after handling.
  • Vehicles with the Stop/Start system will be equipped with two batteries. Both the main and the supplemental batteries must be disconnected to completely de-energize the 12 Volt electrical system.
  • Serious injury or death could result if you do not disconnect both batteries. To learn how to properly disconnect, see an authorized dealer.

CAUTION!

  • It is essential when replacing the cables on the battery that the positive cable is attached to the positive post and the negative cable is attached to the negative post. Battery posts are marked positive (+) and negative (-) and are identified on the battery case. Cable clamps should be tight on the terminal posts and free of corrosion.
  • If a “fast charger” is used while the battery is in the vehicle, disconnect both vehicle battery cables before connecting the charger to the battery. Do not use a “fast charger” to provide starting voltage.
  • Vehicles with the Stop/Start system will be equipped with two batteries. Both the main and the supplemental batteries must be disconnected to completely de-energize the 12 Volt electrical system.
  • If the negative battery cables are not isolated properly it can cause a potential power spike or surge in the system, resulting in damage to essential electrical components.

    Adding Washer Fluid

    The fluid reservoir for the windshield washers and the rear window washer (if equipped) is shared. The fluid reservoir is located in the engine compartment...

    Pressure Washing

    Cleaning the engine compartment with a high pressure washer is not recommended. CAUTION! Precautions have been taken to safeguard all parts and connections however, the pressures generated by these machines is such that complete protection against water ingress cannot be guaranteed...

    Other information:

    Jeep Wrangler 2018-2024 Owners Manual: System Overview


    This vehicle is equipped with a Diesel Exhaust Fluid (DEF) injection system and a Selective Catalytic Reduction (SCR) catalyst to meet the emission requirements. The DEF injection system consists of the following components: DEF tank DEF pump DEF injector Electronically-heated DEF Lines NOx sensors Temperature sensors SCR catalyst The DEF injection system and SCR catalyst enable the achievement of diesel emissions requirements; while maintaining outstanding fuel economy, drivability, torque and power ratings...

    Jeep Wrangler 2018-2024 Owners Manual: NORMAL OPERATION — DIESEL ENGINE


    Observe the following when the diesel engine is operating: All message center lights are off. Malfunction Indicator Light (MIL) is off. Engine Oil Pressure telltale is not illuminated. Voltmeter operation. The voltmeter may show a gauge fluctuation at various engine temperatures...

    Categories

    Automatic Headlights — If Equipped, Lights-On Reminder

    Automatic Headlights

    This system automatically turns the headlights on or off according to ambient light levels. To turn the system on, rotate the headlight switch clockwise to the last detent for automatic headlight operation. When the system is on, the headlight time delay feature is also on. This means the headlights will stay on for up to 90 seconds after you place the ignition into the OFF position. To turn the automatic system off, move the headlight switch out of the AUTO position.

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