How To Install A Car Battery Disconnect Switch

How To Install A Car Battery Disconnect Switch


so I’ve been having some electrical
trouble with my car, and I haven’t been able
to diagnose it or really work on it at
all at. I haven’t had the time, so as a stopgap I
decided I was going to install a battery
disconnect switch and I would you know
take care of the problem with voltage
drain so I’m going to show you how to do that
now and this is this is great if you
have a vehicle that you drive on
occasion this is a great way to save the
batteries in an RV or something like that
just a very quick easy way to take the
voltage load off so the battery doesn’t drain
so quickly I picked up this battery
disconnect switch from Harbor Freight
for about five dollars you don’t have to
get it from Harbor Freight of course I’ll
drop a link to something similar in the
doobly-doo for your reference
Jesus that’s a mess this is what living
in South Georgia for a few years can do
to a car I don’t recommend it also
you’ve probably noticed that I’m doing
this is a series of stills that’s because
there was no way that I was going to be
able to fit a camera on a tripod much
less enough light in the boot of my tiny
car to get video so I just shot stills at
least you can see what’s going on two by
two hands of blue actually sulfuric acid
is no joke and neither is lead exposure
you don’t really want to touch that
stuff if you can help it show some love
put on a glove so you’ll want to reach
in and disconnect the negative lead from
the battery that’s the black one do
this by loosening the bolt that holds
the lead clamp down on the terminal
don’t ask me what size wrench to use
because they’re all different
I used a 12 millimeter end wrench on my
car but yours may vary
all that dielectric grease makes it look
like Dexter Morgan was here but at least
there’s no corrosion now
just clamp the lead onto the shank end
of the disconnect switch the switch has
its own terminal clamp that you’ll need
to loosen a bit in order to fit you on
the battery terminal but a little finesse
will get it snug there then you just
focus you f**k that’s better then you just
take your end wrench and tighten the
clamp down that’s it
all finished righty-tighty engages the
electrical system lefty-loosey disengages
it that’s really all there is to it it’s
a very simple installation you follow
the directions all photos here in this
video so you know if you like this video
absolutely give it a like and a thumbs
up share it with your friends even for
more stuff you can subscribe I
appreciate that and thank you for
watching and until next time Tallyho
y’all
you

12 Replies to “How To Install A Car Battery Disconnect Switch”

  1. I was looking for how best to install this exact disconnect switch. Thanks.

    Also love the Firefly reference. Shiny!

  2. is this reliable ? i am planning to leave my car unattended with battery inside with this switch for 1 -2 years will this switch still preserve charge in battery

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