Emergency Starting With Jumper Cables
When using jumper cables, follow the instructions below.
Warning: Batteries release explosive gas. Do not smoke when working around batteries. Put out all flames and remove all sources of sparks or intense heat in the vicinity of the battery. Do not allow the vehicles to touch each other. Do not lean over the batteries when making connections, and keep all other persons away from the batteries. Failure to follow these precautions could lead to severe personal injury as a result of an explosion or acid burns.
Notice: Make sure both electrical systems are the same voltage. Electronic devices on both vehicles can be damaged when connected to a vehicle with a different operating voltage.
- Apply the parking brakes and turn off all lights and other electrical devices. Ensure that the vehicles are not touching and both ignition switches are turned to the OFF position.
- Remove the battery box cover.
- Connect the positive (+) jumper cable to the positive terminal
or jump start post on the discharged battery. See Fig..
-
Frame Rail
-
Negative Jump Start Post
-
Positive Jump Start Post
Fig. 1, Possible Jump Start Post Location (passenger-side engine compartment)
Disconnect jumper cables in the REVERSE order that they were connected.
-
Discharged Battery
-
Negative Ground Stud
-
Positive Jumper Cable
-
Negative Jumper Cable
-
1st Connection
-
2nd Connection
-
3rd Connection
-
4th Connection
Fig. 2, Jumper Connections
-
- Connect the other end of the positive jumper cable to the positive terminal or jump start post on the booster battery providing the charge.
- Connect the negative (-) jumper cable to the negative terminal or jump start post on the booster battery.
- Connect the other end of the negative jumper cable to the negative ground stud on the vehicle requiring the jump start.
- Start the engine of the vehicle providing the jump start and let the engine run a few minutes to charge the batteries of the other vehicle.
- Attempt to start the engine of the vehicle receiving the jump. Do not operate the starter longer than 30 seconds, and wait at least two minutes between starting attempts to allow the starter to cool.
- When the engine starts, let it idle a few minutes.
- Disconnect the negative jumper cable from the negative cable stud on the jump started vehicle.
- Disconnect the negative jumper cable from the booster battery.
- Disconnect the positive cable from the booster battery.
- Disconnect the other end of the positive jumper cable from the jump started vehicle.
- Install the battery box cover; be sure it is positioned properly before fastening the latch.
Important: Do not attempt to jump start a damaged battery.
Important: On vehicles equipped with optional jump start posts, connect to these posts instead of the battery terminals. Jump start posts may be installed in various locations on the vehicle. See Fig..
Notice: Always connect the batteries and jumper cables correctly (positive-to-positive and negative-to-negative). Connecting a charging device backwards (positive-to-negative) can severely damage the vehicle electrical content and cause non-warrantable failures.
Note: The batteries on a Western Star vehicle may be located in a variety of locations, including under the passenger seat, under the cab, behind the cab, or under the sleeper bunk, if equipped. Some vehicles may have two batteries in the step compartments on both sides of the vehicle.
Warning: Do the next step exactly as instructed and do not allow the clamps of one cable to touch the clamps of the other cable. Otherwise, a spark could occur near a battery, possibly resulting in severe personal injury from explosion or acid burns.
Warning: Do the next step exactly as instructed and do not allow the clamps of one cable to touch the clamps of the other cable. Otherwise, a spark could occur near a battery, possibly resulting in severe personal injury from explosion or acid burns.