Yes, assuming you have access to a volt meter. Set the meter to read DC Voltage and connect it to the battery (you should measure between 12.6 and 12.8 VDC). Have a helper start the engine and allow it to reach operating temperature. Then, have your helper turn on all of the accessories – A/C or heater, headlights (brights), electric water pump, electric fan(s), etc. If you measure below 13.4 VDC, the alternator does not make enough current at idle to support the accessories and keep a surface charge on the battery. This process is outlined fully in Chapters 2 and 5 of Automotive Wiring and Electrical Systems, Volume 2: Projects.
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