car COP ignition system detector ADD750 independent automotive ignition coil test detector

The quick tester works by receiving a signal from the secondary ignition coil. Once the signal is received, the tester determines if the COP is producing the correct amount of voltage and the duration of the arc. If the voltage is correct, the tester beeps and the red LED light flashes; and if the duration of the arc is correct, the green LED will also flash

Test Results

Red LED Light
Consistent, steady flashing and beeping indicates the COP is producing the correct amount of voltage.No response or an inconsistent response indicates the COP is NOT producing the correct amount of voltage. This may be caused by one of the following:
1.Fouled spark plug, or incorrect gap
2.Damaged/corroded wires or connectors
3.Faulty coil or PCM

Green LED light
Consistent and steady flashing indicates the duration of the arc is correct.
No response or an inconsistent response indicates the duration of the arc is NOT correct. This may be caused by one of the following:
1.Shorted windings inside the coil
2. Resistance or bad connections in the
3. primary / secondary connections
4. Faulty coil