1978 Johnson 55 HP Outboards Service Manual, Page 45Get this manual
IGNITION SYSTEM TESTS USING NEON TESTER CHARGE COIL OUTPUT TEST aInsert jumper wire to terminal "A" and terminal "D" in the armature plate end, of the four wire connectorSee Figure 4-21bConnect the neon tester leads to the jumper wires as shownSee Figure 4-21cSet neon tester switch to position number 2dWhile holding load button "B" depressed, crank the engine using the starter rope, and observe the light in the neon testerIf the neon light flashes, the charge coil is goodIf there is no light, replace the charge coil and repeat the charge coil output testeContinue the troubleshooting procedureTRIGGER INPUT TEST Check neon tester battery voltage as follows: aMOdel M-90Connect voltmeter as shown in Figure 4-22Set switch to position 4, and press load button "B Battery voltage should be minimum of 2-12 volts
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Battery adapter Black tester lead Blue tester lead Red meter lead Black meter lead Position No.3 Press button "B" Jumper wires
Figure 4-23M-80 or S-80 Neon Tester
cInsert jumper wire between the "AI! terminals of both four wire connectorsSee Figure 4-24dInsert jumper wire between the "D" terminals of both four wire connectorsSee Figure 4-24