What are these parts & how do I test them?

mickey_bigdaddy said
Trying to get my 318 to fire for first time since I bought this Duster. I turn the ignition key and nothing happens. So I'm tracing the ignition, one part at a time, to see where the problem is located. All I know for sure is that the battery is fully charged. I do know that the first picture is the voltage regulator but how would I test it?

Motor is a '70 318 with 3 speed manual. I know the motor is not original and the floor mount shifter is also not original.

First pic is the starter relay. Take a screw driver and touch the large stud to the small screw on the other wire. When you jump the volts across it, with the key in the run position, it should crank the engine and run, unless the starter is bad.

Second pic is the voltage regulator. Once the engine is running, check with a voltmeter to see if you are getting above 12.5 volts or better.

Third pic is the ballast resister. Check it with a voltmeter for continuity.