Jump Starting A Dead Car Battery: A Few Precautions
- Line both cars up so the batteries are as close as can be. Make sure the cars are in park, and both cars are turned off, and not touching each other before you connect the cables. Actually one of them is already off, or you wouldn't be in this predicament right? Make sure all headlights, blinkers, car radios and A/C's are off, radar detectors are unplugged, cell phones unplugged, everything off. Unplug all accessories from cigarette lighters and other power sockets from both cars. Jump starting a battery can crank 300+ volts through your system and the transients can destroy equipment. These voltage spikes are caused by inrush current, into the inductances in your electrical system. Also, pull the key from the dead car until jumper cables are hooked up.
- Familiarize yourself with the Positive (+) and Negative (-) terminals of both car batteries so you know exactly which one is which. All batteries are clearly marked so if you can't find it, it's probably under 1/8" of caked on corrosion around the terminals. Wipe off any battery acid that may have leaked.
- If the battery is cracked and liquid is leaking out, DO NOT go further! Bite the bullet and go buy another battery and swap it out. If you try to jump start a battery with a crack in it, it will explode, and battery acid will dissolve your eyes (on the positive side though, it does get the red out). It makes no sense to jump a cracked battery, it will die in a few minutes.
- Try to clean off any corrosion around the dead battery terminals, and if you have tools, loosen the wires from the terminals, clean them off, then retighten the wires to the shiny posts. Corroded posts prevent the power from getting through the cables and into your battery to revive it. If you have a file handy, try to file the metal battery posts until they are nice and shiny. In a pinch use pliers to clamp down and scrape off corrosion too as the metal is somewhat soft.
- Usually the positive battery cable is red or orange, and usually the Negative (-) or ground cable is black, but always check for yourself to be sure.
Connecting The Car Battery Jumper Cables
The cables must be connected in this order for safety:1. Connect one positive end of the jumper cable to the positive terminal of the dead battery.
2. Connect the other positive end of the jumper cable to the positive terminal of the good battery.
3. Connect the one negative end of the jumper cable to the negative terminal of the good battery.
4. Connect the other negative end of the jumper cable to a shiny nut or bolt on the dead vehicle. This will need to be a grounded piece on the engine or on the frame of the vehicle. You should only connect to the negative terminal on the dead battery as a last option to avoid an explosion by spark. This is a slight chance but should be avoided if at all possible.
Gentlemen, Start Your Engines!
Now, as we have the car batteries hooked together, let them run for a minute or two before you try to start the dead vehicle. Once the dead vehicle starts, remove the cables in the reverse order that you connected them. Then I recommend having the electrical system checked by a service technician. We at Black Motor Co. have the tools and knowledge to ensure your vehicles electrical system is in good running condition. The battery may just need to have corrosion removed from the battery terminals and it may need a new battery or have the charging system inspected. Don't wait until your vehicle will not start-take care of the problem before you get stranded.
Being the sports nut that I am, I was as happy as one person could get when Nebraska beat Texas in basketball. Helps with some of the pain from football. Let's hope the Huskers can win a few more games and make the NCAA tourney. That would be a blast.
Waiting for Spring
The BLACKMOTORWAY BLOGGER