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Subject:LVC. Stereo Wiring: switch to prohibit battery drain
From:Neil N
Date:Fri, 14 Jul 2017 22:08:07 -0700

Hi all.

So for those who want to connect their stereo so it can be turned on
without turning the key to "ignition on" (or use the key in Su
circuit) but also want to keep the stereo from draining the battery
when van is sitting unused for a while......

Do you install a switch at the "constant" positive wire (typically
yellow) or connect both the OEM switched wire (typically red) and
"constant" wire to that switch?

In the past, I've wired my stereo so that one switch controls power to
the constant and OEM switched wires. What I found was that with that
switch closed (on), but the stereo turned off, the stereo has quite
often turned itself on. My theory is that if the power switch on the
stereo, face plate contacts or some sensitive internal component had a
fault or abnormal sensitivity, the stereo could turn itself on. That
aside, if the stereo is switched at the "constant" power wire, that
goes against the manufactures design. Would switching at that wire
(circuit) cause long term wear and tear to internal components?

Neil.

--
Neil n

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