Guage is showing Yellow

[prattcobra]

My 813 batterys are good.

Guage is showing yellow now.

Cant seem to get the generator to move on the voltage. What is the best way to test and adjust?

Where is the regulator located?

 

[Westech]

Have you checked the voltage with a multi meater?

 

[doghead]

meter, meeter, meater, meet her, meat her....

 

[prattcobra]

I checked both batteries and I am showing 25.08 volts on each

 

[doghead]

Measure each battery individually to see if one may be bad.

Then,

Measure voltage with truck off, then running. it should be higher when running.

If there is no increase while running, you probably have an alternator issue.

If it increases but not high enough(28 volts), remove the 1/4' Allen plug on the alternator, and use a small flat blade screwdriver to adjust the max output voltage(to 28.

This procedure should be in the -20 or -34 Tm also.

 

[SCSG-G4]

Sounds like a generator problem. Time to get out the TM 9-2920-225- series and look at the troubleshooting section

 

[prattcobra]

Sounds like a generator problem. Time to get out the TM 9-2920-225- series and look at the troubleshooting section

where do I find this?

 

[prattcobra]

Will the control box control voltage?

 

[doghead]

Nope

 

[Westech]

where do I find this?

you should own one if you own a MV.... You can down load them from many different sites or buy then on CD in PDF and even the paper books are out there.

 

[doghead]

Here's the correct TM number.

 

[gimpyrobb]

So according to that, we should be able to find 100amp alts for our trucks that are simple bolt in units? COOL!

 

[prattcobra]

wHO SELLS NEW ONES?

 

[armytruck63]

Try adjusting your alternator before buying a new one.

 

[prattcobra]

I've tried adjusting and the guage does not move at all ..

 

[armytruck63]

Try monitoring with a digital multimeter when adjusting. First of all, you can see it while you are making adjustments, and it is more accurate than the gage in the dash.

If making adjustments really doesn't change anything, then it is time to either get your alternator rebuilt, or time for a new one.

 

[prattcobra]

ok. I put another generator on the truck and now I am showing in the green when I first put it on it did not show voltage gaining right away. Then after a few minutes it showed a gain. Does the control box have anything to do with this?

 

[doghead]

No.

 

[prattcobra]

No.

thanks

would you worry if it did not show a charge for the first few minutes?

I wonder what causes it?

 

[doghead]

I have had a couple trucks that have done that. I have never had them not work. Just takes a few seconds to see the gauge change. I just lived with it.