Wednesday 4 May 2011

TESTING IGNITION COIL

Testing ignition coils

MethodBN    
1 Obtain two different ignition coil configurations.
2 List all coil part numbers, voltage, internal resistance specifications where shown.






Coil Specifications
Coil# 1 No ............................................ Coil #2 No .........................................
Coil# 1 Voltage .................................... Coil# 2 Voltage ..................................
Coil #1 Primary .................................... Coil #2 Primary ..................................
Coil# 1 Secondary ............................... Coil #2 Secondary .............................














Coil Test Results
Coil #1 Primary .................................... Serviceable?
Coil #1 Secondary ...............................
Coil #1 Earth leakage test ....................
Coil #2Primary ..................................... Serviceable?
Coil #2 Secondary ...............................
Coil #2 Earth leakage test ....................














Wasted Spark Coil Pack
Note: That if the coil you are testing is off a four cylinder engine you will only can check
two secondary windings, also if the ignition module is incorporated within the coil you will
not be able to test the primary windings
Coil #1 Secondary ............................... Serviceable?
Coil #2 Secondary ...............................
Coil #3 Secondary ...............................
Coil #1 Primary ....................................
Coil #2 Primary ....................................
Coil #3 Primary ....................................















Testing Ballast resistors
1 Obtain 2 ballast resistors with different part numbers
2. List part numbers and resistance specification(s)
3. Measure the resistance of the resistors
Specifications

Ballast resistor 1 No.......................... Ballast resistor 2 No .......................
Ballast resistor No 1 ohm spec ......... Ballast resistor No 2 ohm spec .......

Measured Resistance Values
Ballast resistor No1 measured ohms .............. Serviceable?
Ballast resistor No 2 measured ohms ............. Serviceable

Measuring Current Draw and Voltage Drop
Standard Single tower coil

1. Wire up a ballast resistor in series with your coil primary winding values as shown in
the following diagram.
2. Connect an ammeter in series and note the current draw.
3. Measure and note the voltage drop across the ballast resistor.
4. Measure and note the voltage drop across the coil primary
.

Current draw ...............................................................
Coil calculated Voltage Drop ........................................
Coil measured Voltage Drop ........................................

Ballast resistor calculated voltage drop........................
Ballast resistor measured voltage drop ........................

Did your calculated values equal your measured results explain why or why not?
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