Battery saver relay is behind the radio
But you need to test battery drain AFTER 40 minutes, to see if battery saver is working.
Battery drain should be 0.03(30mA) to 0.07(70mA)amps after relay opens.
test battery after it sits overnite, 12.3volts or higher is OK.
12.2 is getting pretty old, less is too old, find a battery sale
New battery will test 12.8volts = 100%
12.2volts = 60%
that 12.2volts will drop to 12.0v on a cold morning and click, click, click
Then leave voltmeter connected and disconnect coil wire, so no spark, have some one crank the starter for 15 seconds and watch the battery voltage, if it is dipping below 9.5volts it is time to change batteries