[TR] what is going on?????

Sun Jun 14 10:38:17 MDT 2020

For those of you who like tools, this is a great one for testing a battery.

https://www.amazon.com/BA7-100-1200-Electronic-Battery-System/dp/B0015PI7A4/ref=asc_df_B0015PI7A4/?tag=hyprod-20&linkCode=df0&hvadid=312280085431&hvpos=&hvnetw=g&hvrand=14838984143453092033&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1013964&hvtargid=pla-499796143917&psc=1

I don't know why it's brand is SOLAR, there is nothing solar about it.  The battery doesn't need to be fully charged either, or disconnected from the car.  You enter the type of battery and the CCA it's rated for, it runs a test and along with OK, Charge and Fail, it will show you how many CCAs are left.  I recently checked a 5 year old Optima Red Top battery I run in my TR3 rated at 800 CCA.  It tested good, and still has 720 CCAs.

Rye
PH: 530-FIND-RYE

On June 14, 2020 at 8:56 AM, dave <dave at ranteer.com> wrote:

No, we attempted to put the battery in the car after it had been connected to a charger for some period.  The negative terminal sparked so we did not.  We put it back on the floor where we checked it with the multi meter.   

We also double checked that we had the ground cable to the engine and the positive cable to the electrical system. 

From: DAVID MASSEY <dave1massey at cs.com> 
Sent: Sunday, June 14, 2020 10:31 AM
To: dave at ranteer.com; triumphs at autox.team.net
Subject: Re: [TR] what is going on?????

Double checked that we had the ground to the engine and the positive to the electrical system.

The multimeter, with the red on the positive terminal and the black on the negative, read -9.97

This battery was apparently in the car.  Did you check this battery right at the terminals?

Dave

-----Original Message-----
From: dave <dave at ranteer.com>
To: triumphs at autox.team.net
Sent: Sun, Jun 14, 2020 10:18 am
Subject: Re: [TR] what is going on?????

Tested the battery out of the car

From: DAVID MASSEY <dave1massey at cs.com> 
Sent: Sunday, June 14, 2020 9:25 AM
To: dave at ranteer.com; triumphs at autox.team.net
Subject: Re: [TR] what is going on?????

Did you test directly at the battery terminals?

It is possible to charge a dead battery in the wrong polarity.  If the battery was complete dead and someone hooked up the charger with the polarity reversed (ie: positive charger lead to the NEG battery terminal and vice-versa) it will charge up in the wrong polarity.  I've seen it done.

Many of the smart chargers will not do this.  Many will not charge a dead battery, but some will and the old style chargers don't care.

Connecting a battery to a car in the reverse polarity will cause all manner of problems.  It is not recommended.

Dave

-----Original Message-----
From: dave <dave at ranteer.com>
To: triumphs at autox.team.net
Sent: Sun, Jun 14, 2020 8:51 am
Subject: Re: [TR] what is going on?????
Yes.  I tested the good battery and it showed 12.7 volts.  positive

From: Geo Hahn <ahwahneetr at gmail.com> 
Sent: Sunday, June 14, 2020 7:40 AM
To: dave <dave at ranteer.com>
Cc: triumphs at autox.team.net
Subject: Re: [TR] what is going on?????

Have you confirmed that the leads are correctly connected at the multimeter?

On many modes they can be reversed.

Geo

On Sat, Jun 13, 2020, 7:57 PM dave <dave at ranteer.com> wrote:
We bought a car a few months ago (an 88 jeep actually).  Wasn’t running or driving, needed some work, battery was dead.

Today we finally got it running and driving using a known good battery from another car.

Set the jeep’s battery up on a charger a day or two ago and decided to try it in the jeep after all we succeeded in getting it running and driving.

Hooked up the positive first, then touching the negative caused a spark!!!!

Double checked that we had the ground to the engine and the positive to the electrical system.

The multimeter, with the red on the positive terminal and the black on the negative, read -9.97

Reversed it and got 9.97.

Checked the good battery – no, the multimeter is not broken.

Checked the jeep’s old battery again, same results.  Good battery – same results (about 12.97)

What is going on????  how is this possible?  Yes, we are replacing the battery but if someone had told me this story I would have told him he must have mixed up the terminals, that its not possible.

Can anyone explain this to me?

And yes, we are replacing the battery
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