To know if your Cobalt starting problems are from dirty battery terminals, you need to investigate them. If there isnвЂ™t enough current flow to crank the engine, you may only hear clicking noise from the starter solenoid when you try to start the engine. Corrosion occurs when the battery acid reacts with the metal terminals which can lead to loss of contact and reduced current flow. Corrosion on battery terminalsД«attery corrosion is a fairy common problem, especially if the installed battery is more than 2 years old. It is possible the battery in your Chevy Cobalt is in good health, but the current flow is interrupted due to loose electrical connection, a broken wire, or corrosion on the battery terminals. Therefore it is recommended to keep the engine of the donor vehicle off when jump starting your Cobalt. Warning: There is always a risk of burning up the alternator or other electrical components if the engine of the donor battery vehicle is running during jump start. Remove the cables in the reverse order.Safety warning: Connecting black cable directly to the negative terminal of Cobalt battery can ignite flammable gases from the battery due to sparks. Finally connect the other end of the black cable to any bare unpainted metal part of the body or engine of your Cobalt.Connect the black cable to the negative terminal of donor battery.Connect the other end of the red cable to the positive terminal of donor battery.Connect the red cable to the positive terminal of the dead battery in Cobalt.Requirements: The engine of both the vehicles should be off, and the transmission in Park. To rule out dead battery, your best course of action is to jump start your Cobalt using jumper cables and a healthy battery from another vehicle, or using a battery booster if available. This can happen due to internal degradation of the battery, if the vehicle has been sitting for a long time, or if the alternator in your Cobalt has malfunctioned and not charging the battery properly. If the voltage drops too much, below 10 volts, your battery doesnвЂ™t have enough charge to start the engine. Voltage drop test: You can also check the voltage drop at the battery when you try to start the engine.

Sometimes a battery showing over 12.4 volts may not be able to supply enough current to crank the engine. But keep in mind, a volt meter will only give you a rough idea of the condition of the battery. A healthy battery should have 12.6 volts or more when fully charged. The easiest method to check the 12v battery in Cobalt is by measuring the voltage with a multimeter. Symptom: Rapid clicking sound This is what rapid clicking noise normally sounds like due to a weak battery, or due to a poor battery connection (for example due to corrosion on battery terminals). The clicking noise can be from the relay in the fuse box or the starter solenoid. If there isnвЂ™t enough charge in the battery to power the starter motor, and you try to crank the engine, the battery voltage will get so low that it canвЂ™t properly power the lights, accessories and of-course the starter. Flickering dashboard lights, rapid clicking noiseДЄnother symptom of weak battery in Cobalt is flickering dashboard lights and/or rapid clicking noise when you try to start the engine. The starter motor requires high electric current to turn over the engine, whereas lights and wipers take very little current to operate вЂ“ so donвЂ™t rule out weak battery even if electrical accessories work normally in your Cobalt. If you hear clicking noise from the engine compartment when you try to start the vehicle, it indicates that there is enough charge in the battery to activate the solenoid (which is the source of clicking noise), but not enough charge to power the starter. The leading cause of clicking noise and no start in Chevy Cobalt is weak battery.

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