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Other makes do this as well. Modern cars have a 'battery management
system' or similar because so much is now run on
electricity--steering, for instance--that you have to have assured
power at all times. I learnt of all this when I asked a simple (I
thought) question on a Mustang forum about using a 12V source in
parallel so I wouldn't lose all my settings--drive mode, satellite,
etc.--when I needed to swap a leaker. F150s, for example, have a
pretty elaborate process to even charge a battery:<br>
<br>
<a class="moz-txt-link-freetext" href="https://www.youtube.com/watch?v=I_KmO-KaR4A">https://www.youtube.com/watch?v=I_KmO-KaR4A</a><br>
<br>
After a lengthy, er, discussion I said 'F-it' and just swapped
batteries like I always have; I lost my custom drive mode but was
none the worse off for wear. But, I recommend you read your owners'
manual before doing anything on the electrical system of a car built
in the last 10 years or so.<br>
<br>
Bob<br>
<br>
<br>
<div class="moz-cite-prefix">On 1/13/2024 1:54 AM, Moose wrote:<br>
</div>
<blockquote type="cite"
cite="mid:OFF255C646.F50E9F9A-ON85258AA3.0036348B-85258AA3.003669D0@mail.megageek.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<font size="2" face="sans-serif">One more note of stupidity on
this topic.
Modern Range Rover requires their computer to change a battery!</font>
<br>
<br>
<font size="2" face="sans-serif">That's right, you need to tell
their
computer there is a new battery.</font>
<br>
<br>
<font size="2" face="sans-serif">I'm not sure if other makes are
going
this way, but it is one item on the long list of reasons I'll
never own
another RR!</font>
<br>
<br>
<font size="2" face="sans-serif">Moose</font>
<br>
<br>
<br>
<br>
<font size="1" face="sans-serif" color="#5f5f5f">From:
</font><font size="1" face="sans-serif">Dwade Reinsch
<a class="moz-txt-link-rfc2396E" href="mailto:dreinsch@swbell.net"><dreinsch@swbell.net></a></font>
<br>
<font size="1" face="sans-serif" color="#5f5f5f">To:
</font><font size="1" face="sans-serif">David Scheidt
<a class="moz-txt-link-rfc2396E" href="mailto:dmscheidt@gmail.com"><dmscheidt@gmail.com></a>,
old dirtbeard <a class="moz-txt-link-rfc2396E" href="mailto:dirtbeard@gmail.com"><dirtbeard@gmail.com></a></font>
<br>
<font size="1" face="sans-serif" color="#5f5f5f">Cc:
</font><font size="1" face="sans-serif"><a class="moz-txt-link-rfc2396E" href="mailto:shop-talk@autox.team.net">"shop-talk@autox.team.net"</a>
<a class="moz-txt-link-rfc2396E" href="mailto:shop-talk@autox.team.net"><shop-talk@autox.team.net></a></font>
<br>
<font size="1" face="sans-serif" color="#5f5f5f">Date:
</font><font size="1" face="sans-serif">01/12/2024 23:12</font>
<br>
<font size="1" face="sans-serif" color="#5f5f5f">Subject:
</font><font size="1" face="sans-serif">Re: [Shop-talk]
Stranded by a bad car battery.</font>
<br>
<font size="1" face="sans-serif" color="#5f5f5f">Sent by:
</font><font size="1" face="sans-serif">"Shop-talk"
<a class="moz-txt-link-rfc2396E" href="mailto:shop-talk-bounces@autox.team.net"><shop-talk-bounces@autox.team.net></a></font>
<br>
<hr noshade="noshade">
<br>
<br>
<br>
<font size="2" face="Arial">Thanks to all who added to my
knowledge base
for modern cars and batteries.</font>
<br>
<br>
<font size="2" face="Arial">I replaced the old battery the next
morning,
started right up, and continues to run perfectly. I guess I'll
just
have to have battery tested after about three years of use.</font>
<br>
<br>
<font size="2" face="Arial">Thanks again!!</font>
<br>
<br>
<font size="2" face="Arial">Dwade</font>
<br>
<br>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">On Wednesday, January
10, 2024
at 04:10:50 PM CST, old dirtbeard <a class="moz-txt-link-rfc2396E" href="mailto:dirtbeard@gmail.com"><dirtbeard@gmail.com></a>
wrote: </font>
<br>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">Hi David, </font>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">Yes, I do understand
about
the lead acid chargers. I have accumulated many over the last 50
years.
🙂</font>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">Best,</font>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">Doug</font>
<br>
<font size="2" face="Arial" color="#2f2f2f">mobile</font>
<br>
<hr>
<br>
<font size="2" face="Calibri"><b>From:</b> Shop-talk
<a class="moz-txt-link-rfc2396E" href="mailto:shop-talk-bounces@autox.team.net"><shop-talk-bounces@autox.team.net></a>
on behalf of David Scheidt <a class="moz-txt-link-rfc2396E" href="mailto:dmscheidt@gmail.com"><dmscheidt@gmail.com></a><b><br>
Sent:</b> Wednesday, January 10, 2024 9:17:13 AM<b><br>
To:</b> Dwade Reinsch <a class="moz-txt-link-rfc2396E" href="mailto:dreinsch@swbell.net"><dreinsch@swbell.net></a><b><br>
Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:shop-talk@autox.team.net">shop-talk@autox.team.net</a>
<a class="moz-txt-link-rfc2396E" href="mailto:shop-talk@autox.team.net"><shop-talk@autox.team.net></a><b><br>
Subject:</b> Re: [Shop-talk] Stranded by a bad car battery.</font><font
size="2" face="Arial" color="#2f2f2f">
</font>
<br>
<font size="2" face="Arial" color="#2f2f2f"> </font>
<br>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">On Jan 10, 2024, at
00:48,
Dwade Reinsch <a class="moz-txt-link-rfc2396E" href="mailto:dreinsch@swbell.net"><dreinsch@swbell.net></a> wrote:<br>
</font>
<br>
<font size="2" face="Arial" color="#2f2f2f"> </font>
<br>
<font size="2" face="Arial" color="#2f2f2f">This afternoon I was
sitting
in the 2016 Honda Odyssey van waiting for granddaughter to
finish a theater
activity and I went to sleep in the front seat. Had the radio
and
inside lights on. When she finished and came out, car would not
start.
Completely dead. Electric seat would not come back to driving
position, etc.</font>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">Here's the question:
In
the old days a weak battery would give notice by cranking
slowly, etc.,
before failing. This is the car I drive regularly and it gave
NO
warning. Luckily, I could call son-in-law and he came to help.
Would
not start with good set of booster cables. Would not start with
15
minutes of charging on cables before attempting to start. So in
the
morning I'll take pickup and tools and pull battery, get a
replacement,
and move the van home.</font>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">Does anyone have a
suggestion
for identifying a failing battery before being stranded?
(Battery
is about 4 years old.)</font>
<br>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">If used properly, the
conductance
testers work well. Not cheap, but every auto parts store will
test
for you, assuming your battery is accessible. Many cars,
starting
just a bit later than your ofdesy, have state of charge and
battery performance
information tracked by the computer. (OnStar sent me email
telling
me the battery is low when I left my car on to listen to the
ballgame at
a campsite. I also get a monthly email, which told me to replace
the battery
for a couple months before I actually had it replaced.)</font>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">Modern cars have much
higher
loads at start time, and lots of them require a reasonably good
voltage
to turn the computer on. Without that, the car won’t do
anything
(the computer controls the starter solenoid on most cars). The
various
computers also control all the other parts, which is why the
seat couldn’t
move. </font>
<br>
<br>
<font size="2" face="Arial" color="#2f2f2f">This fall, I drove my
wife’s
fusion to the garage to do the brakes. I turned off and on a
couple times
to get it spotted in the right spot. The third time I tried to
start it,
battery was dead. 20 seconds earlier, it fired on instantly,
with no slow
cranking. Since I was in the garage, I had a battery charger
handy.
10.2 volts or something like that. Putting the charger on lowest
setting
let it start. Plenty of joules in the battery, just not enough
voltage
to turn the ecm on. (I replaced the battery before pulling it
out of the
garage, it was 4 or 5 years old.)</font>
<br>
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