1971 Fury Ignition Problem

[runrmc]

My 1971 Fury 440 does not have any voltage at the coil and only ~4 volts at the ballast resister. Is it the ignition switch? The battery is new. Ideas?
Thanks

 

[Davea Lux]

My 1971 Fury 440 does not have any voltage at the coil and only ~4 volts at the ballast resister. Is it the ignition switch? The battery is new. Ideas?
Thanks

First check to see if the battery is dead, if the car cranks over, it is probably charged enough to start the car. Low voltage to the ballast resistor could be a corroded ignition switch, but it could also be corroded connections in the firewall plug. Check all the ignition wires from the ballast resistor to the firewall plug, if there are any crimp connectors, they are probably the source of the voltage drop. There are two wires going to the ballast resistor from the ignition switch, one goes to the input side of the resistor and is the run circuit for the ignition system. The second wire is hooked to the output side of the resistor, this wire provides battery voltage to the coil with the ignition switch in the start position. You should have battery voltage on the input side of the ballast resistor and about 6.8 volts coming out of the ballast resistor in the run position. Check these things and report back.

Dave

 

[runrmc]

Dave,
I pulled the wire from the ignition switch out of a piece of wire that must have been a extra connector from when it was police car and I now have 6.8 volts at the coil. Tomorrow I will have my son crank it over while I check for spark at
a one of the plugs with my spark checker. If I have spark, then it is must likely lack of fuel. The car has been sitting, so the carb is dry.
Thanks for your help,
Bob