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Not a new topic but update.

 
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jeeptj1
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Joined: Aug 20, 2010
Posts: 143
Location: Illinois

PostPosted: Sun Mar 17, 2019 9:13 am    Post subject: Not a new topic but update. Reply with quote

Ok first, nobody on here has offended me. . I appreciate the help. Plus the fact that Iíve been offended by professionals and you guys are easy. Ok so letís get to it. My batteries were 8/9 years old. They wouldnít hold a charge and I did the hydrometer test and even figured in the temperature correction and they were shot. So I got new batteries. Did the ohms check on the starter and it was good. Here are the voltages i got and some of them may be not needed but I wanted to check them all.

The batteryís had worked fine for nine years and they are wired in correctly according to all the diagrams.

Engine battery NOT RUNNING 12.77 volts
Starter to negative terminal on engine battery not running 25.39 volts
Starter to positive terminal on engine battery not running 12.61 volts

Engine battery RUNNING 13.44/13.55 volts
Starter to negative terminal on engine battery running 27.9/28.03 volts
Starter to positive terminal on battery engine running 13.60/14.11

Cowl engine battery NOT RUNNING 12.61 volts
Starter to negative terminal on cowl battery not running 12.61 volts
Starter to positive terminal on cowl battery 00.00 volts

Cowl battery RUNNING 13.50/13.55
Starter to negative terminal on cowl battery 13.70/14.10
Starter to positive terminal on cowl battery 00.00 volts

Wes, a question on you number 7 in the other thread. Am I reading it wrong or is it saying the positive terminal from the battery should read 28/32 volts when I got zero volts?

Dpcd67 thanks for your input on the manual. It basically for those two pages just showed the battery hook up and like I said, itís worked for nine years.

So I hope I didnít leave any thing out and didnít cross any of my numbers up.
And as always everybodyís help is appreciated. John jr
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wesk
Site Administrator
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Joined: Apr 04, 2005
Posts: 14981
Location: Wisconsin

PostPosted: Sun Mar 17, 2019 9:33 am    Post subject: Reply with quote

Quote:
7 - When any standard military 28 Volt System is operating properly no matter weather the battery is a single 24 Volt or Dual 12 Volt they will read at the + terminal connected to the starter 28 to 32 volts.


Exactly what it says. At the cowl battery's + terminal which is the cable going to the starter.

Quote:
Wes, a question on you number 7 in the other thread. Am I reading it wrong or is it saying the positive terminal from the battery should read 28/32 volts when I got zero volts?


If you are referring to the zero's you got in the last 2 measurements they are correct. You won't get the actual voltage at the engine bay battery unless you attach the black lead to a ground and when you do you get only the voltage of the engine bay battery.

You did an overall good job but your charging voltage is low or the engine was only idling. You should check charging voltage at the cowl battery + terminal with engine running at cruise RPM and then it should read between 28.5 and 32 volts.
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Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

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jeeptj1
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Joined: Aug 20, 2010
Posts: 143
Location: Illinois

PostPosted: Sun Mar 17, 2019 10:54 am    Post subject: Reply with quote

Wes, yes it was just idling and I need to check the belts as to how tight they should be. Will read the manual! Just checked manual. Says one inch deflection in belt! Thanks again john jr.
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