Tests for Thunderbolt Ignition:
Tests for Thunderbolt Ignition:
W/ignition key on AND BILGE WELL VENTILATED OF GAS FUMES!!!
#1 - Connect your voltmeter neg. lead to the engine ground and pos. lead to the white/red wire terminal at the dist. It should read 12 volts.
#2 - If 12 volts is present remove the coil wire from the distributor cap and connect it to a spark gap tester to ground.
Remove the white/green lead from the dist. terminal. Turn the ign. key to on and strike the white/green lead to ground. If there is spark, replace the ignition sensor in the dist.
#3 - If there is no spark, substitute a new coil and repeat test
#2. Now if you get spark, install a new coil. NO SPARK, replace ign. amp.
#4 - In #2, if there is No voltage present, disconnect the white/red wire and check it again for 12 volts. If 12 volts is present, replace the ignition sensor inside the dist. cap. If no 12 volts present w/it disconnected--ignition timing module (amplifier) is shot and must be replaced.