Does it matter which battery terminal I disconnect first?
When disconnecting the cables from the old battery, disconnect the negative first, then the positive. Connect the new battery in the reverse order, positive then negative.”
What terminal to remove first car battery?
negative terminal
Always remove the negative terminal first when changing a car battery. Use a socket wrench to loosen the nut on the black, or negative, terminal.
Do you disconnect red or black first?
First remove the negative (black) cable from the car, then remove the positive (red) cable from the battery terminal. Depending on the cause of your dead battery, you may want to have the car immediately looked at.
What’s the best way to replace a starter relay?
Make sure that it is not burned and make sure that the small wire from the ignition switch is not loose. Step 1: Put on safety glasses. Do not work on or around a battery without any eye protection. Step 2: Hook up a Sun Vat-40 or Ferret-40 to the battery. Turn the knob and load the battery up to 12.6 volts.
What happens to the armature of a starter relay?
When a current passes through the coil of a relay, the armature moves to increase the flux. When the current is switched off, the armature contracts. In a starter relay, when a key is turned in the car ignition, the movement of the armature closes the pair of heavy contacts that serve as the bridge between the battery and the starter motor.
What are the symptoms of a failing starter relay?
Symptoms of a failing starter relay include problems starting the vehicle, the starter staying on after the engine is cranked, and a clicking noise coming from the starter. Sometimes the starter relay will stay on causing the starter motor gear to stay engaged with the engine ring gear, even when the engine is propelled on its own.
Why does my stereo have an external starter relay?
In addition, external starter relays tend to have easy access for someone to tap in a fuseable link to a stereo amplifier. This is usually fine; however, when the amplifier is active and the starter motor becomes active, the relay can create too much heat, destroying the contact points inside and making the starter relay ineffective.