Chris Mares wrote in news:7sXGg.6579$Tl4.3557
@dukeread06:

Is there a quick fix for this besides installing a second batery?
Do I need to install a diode in the accessory circuit to prevent the
started from sucking power back from the locator and stereo?


No, what you need to do is to turn off ALL ELECTRONICS while cranking the
engine to protect the electronics from the inductive kick and low voltage
the starter drawing 300 amps from the poor little battery creates.

Go out to your car and turn on the switch. Turn on the radio. Now, notice
how your radio turns OFF while the car is cranking to protect it from the
awful surges cranking produces? Do you think car manufacturers do that to
spend more money building the car....or to keep owners with warranties from
getting free radios?

All electronics hooked to the same battery the starter is hooked to need to
be OFF WHILE CRANKING!

The reason for the shutdowns you're seeing is the battery voltage drops to
10V or less from the awful current drain, especially if you hold it and the
battery runs low on electronics as its chemistry is under such a shock....

--
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You can tell because none of them ever called Earth.