Pulaski Towing · Pulaski, TN · Updated August 2026

How to Jump Start a Car Safely — A Step-by-Step Guide

Jump starting a car is not hard, but the order matters and a couple of the steps are genuinely about safety rather than fussiness. This is the version we would give a friend standing in a parking lot in Pulaski with a set of cables and a helpful stranger. Read it once now and you will not have to read it later in the rain.

Before You Connect Anything

• Park the vehicles nose to nose, close enough for the cables to reach comfortably, but not touching. Both in park or neutral, both with the parking brake set.
• Turn everything off on both cars — ignition, headlights, radio, climate control.
• Look at the dead battery. If the case is cracked, bulging, leaking, or frozen solid, stop. Do not jump it. A damaged battery can rupture.
• Find the terminals. Red or a plus sign is positive; black or a minus sign is negative. On many newer vehicles the battery is buried and there are marked remote jump posts under the hood instead. Use those.
• Check your cables. Frayed insulation or corroded clamps make a bad connection and a hot cable.

The Order: Red, Red, Black, Metal

1. Red clamp to the dead battery's positive terminal.
2. Other red clamp to the donor battery's positive terminal.
3. Black clamp to the donor battery's negative terminal.
4. Last black clamp to bare, unpainted metal on the dead car's engine block or an engine bracket — not the negative battery post. A strut tower bolt or an engine lifting bracket works well.

That last step is the one people skip, and it is the one that exists for a reason. Batteries vent hydrogen while charging, and the final connection is the one most likely to spark. Making it several inches away from the battery keeps the spark away from the gas.

Starting It Up

Start the donor vehicle and let it run for two or three minutes. Some drivers hold a fast idle; a normal idle is fine on modern cars. Then try the dead vehicle.

If it starts, leave the cables connected for another minute or two, then remove them in reverse order — black off the engine block, black off the donor, red off the donor, red off the dead car. Keep the clamps from touching each other or any metal while the other end is still attached.

If it does not start after two attempts of roughly ten seconds each, stop cranking. Let it charge for another five minutes and try once more. Beyond that you are cooking the starter, and the problem is probably not the battery.

Mistakes That Cost Real Money

• Reversing the polarity. Red to negative will blow fuses and can take out the alternator or an engine control module on either vehicle. This is the expensive mistake.
• Letting the clamps touch. A dead short across a car battery throws serious sparks and can damage both cars.
• Cranking and cranking. Ten seconds at a time, with rests. Starters overheat quickly.
• Jumping a frozen or damaged battery. Genuinely dangerous. Walk away and call someone.
• Driving straight home and shutting it off. You will be right back where you were tomorrow morning.

When to Stop and Call Instead

Some situations are simply not worth improvising through. If you are on the shoulder of I-65 or on a narrow stretch of US-31 with no room to park a second car safely, do not stand between two vehicles in traffic to fiddle with cables — the NHTSA ranks roadside exposure among the more serious risks drivers take without thinking about it. If the car takes a jump and dies again within a few miles, that is an alternator, not a battery. And if you get one heavy clunk instead of a crank, no amount of cable technique will fix a starter.

In any of those cases a mobile jump start or a tow across Giles County is the faster, cheaper answer. It is a short call and an honest quote before anyone rolls.