Electrically exhausted (1 Viewer)

jblueridge

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I am working on a friend's 94 FZJ80.
It seemed like the battery was weak so I charged it with a Noco "smart" charger.
Charger gave no errors and charger says battery is at 100%.
Activating headlights just makes a relay buzz and the horn barely honks.
Voltmeter says battery is at 11.67 volts but I have no way to measure amps.

Fusible links right off the battery look good and have continuity.
Ground from battery to fender is good.
The larger ground wire (to starter?) has continuity to the body.

I am charging a different battery that I know is good and will swap that in tomorrow as a check.

Is there something else pertaining to 80 series that I should be checking?
Thanks.
 

jblueridge

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I dunno.
At first I set it on REPAIR and it got through that so fast I thought no repair was needed.
On just CHARGE, it got up to 100% in 2 hours.
I guess it means 100% of all this battery is capable of.
 

flintknapper

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I dunno.
At first I set it on REPAIR and it got through that so fast I thought no repair was needed.
On just CHARGE, it got up to 100% in 2 hours.
I guess it means 100% of all this battery is capable of.

Stop screwing with it. Pull the battery, take it to AutoZone/Other....have it LOAD TESTED.

Odds are....its shot.
 

flintknapper

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Yeah.
We are miles from anywhere here so when I get a spare 90 minutes that's what will happen.

OK.

Alternately, remove battery from vehicle.

Install a 'known to be good battery in it' (not another dead battery that is laying around and needs charging) and test.

IF you don't have a multi-meter, get one. Then take old battery, test voltage. If low, charge, then let it 'rest' 8-10 hours. Retest and see if the battery:

A. Took the charge
B. Held the charge

Or MAKE time to take it in and have it load tested (the best solution). But I wouldn't spend any more time trying to diagnose it without the proper tools.

But before you do any of the above check ALL connections, grounds and cables.
 

thatcabledude

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This is your friend.

360E72CC-467B-4054-A56F-82D5EFF33340.jpeg
 

flintknapper

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Like EVERYONE has one of those in their truck!!!! ;) :flipoff2:

True. Not reasonable to expect that.


But....everyone should have an inexpensive Multi-Meter in their primary vehicle.

You can't 'load test' a battery with it....but it can give you a much better idea of the voltage present than a gauge on the dash or a battery charger will.

Useful for so many other things as well. IMO....there is no excuse for a DIYer to be without one.

Doesn't have to be expensive, only needs to have the basic functions.

Multi_Meter.jpg
 

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