Position the working car nose-to-nose with the dead one, engines off. Red clamp on dead positive (+), other red on live positive. Black on live negative, last black clamp on a clean unpainted metal point on the dead car's engine block — not the dead battery's negative terminal. The order matters.
Start the working car, let it run 2–3 minutes. Then start the dead car. If it cranks slowly or not at all after 5–10 seconds, stop — you have a deeper problem than a low charge. Don't keep grinding the starter; you'll burn it out.
Disconnect in reverse order: dead-side black first, then live-side black, live-side red, dead-side red. If you're unsure or the car still won't start, call us — same $249 / hour rate as every roadside service, $224 first hour when you book online.