TM 5-3805-258-24-2ENGINETESTINGPositive Diode CheckConnect ohmmeter between each rectifier solderphase terminal (9) and the (B+) terminal (12).EXCITATION DIODE CHECK(Inside View)9. Bridge rectifier terminals. 13. To the (D+) terminal (14).POSITIVE DIODE CHECK(Inside View)9. Bridge rectifier terminals. 10. To the (B+) terminal (12).EXCITATION DIODE CHECK(Outside View)11. To the bridge rectifier terminals. 14. (D+) terminal.REGULATOR TESTPrecautionsPOSITIVE DIODE CHECK(Outside View)11. To the bridge rectifier terminals (9). 12. (B+) terminal.Excitation Diode CheckConnect ohmmeter between each rectifier solderphase terminal (9) and the D+ terminal (14).Do not recharge battery during tests. Generatormust not be in operation (rotating) when the regula-tor is connected and disconnected. Alternator andvoltmeter must each be connected in parallel(across) with the battery.Disconnect the battery from the generator only whenthe generator is not in rotation. Do not operate thealternator without the battery.Test Conditions and ConnectionsRegulator and generator cold [approximately 20° C(68° F)]. Carbon pile is connected in parallel withthe battery.5-12i
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