When measuring the terminals with a meter I am getting 3 volts. I am getting 1.5 V from each battery bank, but I am not getting the 9V I should. When I connect the motor directly to a 9V battery everything works. l cleaned the corrosion on the terminals as well. See attached pictures.

MOD:Improved your images.E

 

hi op,
Welcome to AAC.
What voltage do you measure on the output terminals when only two batteries are in the holder [ say the two at one end].??
E

 

0.20 at one end and 0.9 at the other.

 

hi,
Reason for doing that test is that it maybe a battery holder that connects 3 pairs of 1.5V in parallel, giving 3V out with a higher current rating.
It is hard to tell in the photo how the batteries are linked in the holder.
E

 

I've attached more images.

 

There should be six batteries in series. 6 x 1,5 = 9V

 

There should be six batteries in series. 6 x 1,5 = 9V

Yes. And the output voltage is only 3 volts. See previous posts

 

When measuring the terminals with a meter I am getting 3 volts. I am getting 1.5 V from each battery bank, but I am not getting the 9V I should. When I connect the motor directly to a 9V battery everything works. l cleaned the corrosion on the terminals as well. See attached pictures.

MOD:Improved your images.E

Do a bit of simple troubleshooting. Using your first illustration as a guide, connect the positive probe of your voltmeter to the positive end of the top cell (on the right). Then in sequence, with the negative probe, measure the voltage on each end of each battery, starting with the negative end of the top battery, then the positive of the second battery down (which should indicate the same as the last measurement), then the negative end of the second battery. Continue down until you have measured on each end of every battery with respect to the positive end of the top battery..This will indicate if you have a continuity problem in the battery holder and where it is.

 

Do a bit of simple troubleshooting. Using your first illustration as a guide, connect the positive probe of your voltmeter to the positive end of the top cell (on the right). Then in sequence, with the negative probe, measure the voltage on each end of each battery, starting with the negative end of the top battery, then the negative of the second battery down (which should indicate the same as the last measurement), then the positive end of the second battery. Continue down until you have measured on each end of every battery with respect to the positive end of the top battery..This will indicate if you have a continuity problem in the battery holder and where it is.

I have done this already. Voltage measures the same for each bank. So my best bet is to replace the battery terminals or just use a 9V battery holder?

 

When measuring the terminals with a meter I am getting 3 volts. I am getting 1.5 V from each battery bank, but I am not getting the 9V I should. When I connect the motor directly to a 9V battery everything works. l cleaned the corrosion on the terminals as well. See attached pictures.

MOD:Improved your images.E

The connections behind the batteries inside your device may not be wired in series. You may want to look at the circuit board.... rather than just the individual batteries.

 

Perform a continuity check between each pair of springs on one side of the holder. No batteries should be in the holder. Just check continuity

• Between the bottom and middle springs
• Between the middle and top springs
• Between the top and bottom springs

And report your results.

 

I have done this already. Voltage measures the same for each bank. So my best bet is to replace the battery terminals or just use a 9V battery holder?

No, you have not done what I suggested. You have measured each battery separately. Read what I wrote again and try what I suggested, keeping the negative probe of the voltmeter in the same place all the time. The first two measurements should be the voltage across the top battery. The third and fourth measurements should be the sum of the voltages of the top two batteries, etc. This will tell you exactly where the problem is..