1988 "CC" Colt / Junior thru 8 Models Service Manual, P/N 507659, Page 157Get this manual
Running Tests Using C.DVoltmeter and AdapterDeluxe thru 8 The C.Dadapter permits tests on the charge coil, sensor coil, and power pack while the engine is runningThe connectors are plugged into the adapter ONE PAIR AT TIME and the jacks permit tapping the voltmeter into that particular circuitWhen the adapter switches are in the ON position, the circuit is complete through the adapter In the OFF position, the signal goes from the input side to the meter jack only, eliminating any influence from the output side of the adapterThe engine will not run with switches in OFF position