CUCV m1009 no alt lights on when key on

[Bobbycole927]

I’m at a loss I bought this 85 CUCV blazer and when the key is on neither alt lights come on when testing both batteries together I’m getting 24 volts how ever the batteries are dieing I’m not sure what the guy before me did but if anyone has any help it would be appreciated

 

[Curtisje]

I’m at a loss I bought this 85 CUCV blazer and when the key is on neither alt lights come on when testing both batteries together I’m getting 24 volts how ever the batteries are dieing I’m not sure what the guy before me did but if anyone has any help it would be appreciated

I would begin with testing each battery individually while the truck is off and then again while it is running. What voltage do you get? Let's first confirm weather or not your alternators are charging. Good luck. Report back when able.

 

[Bobbycole927]

I would begin with testing each battery individually while the truck is off and then again while it is running. What voltage do you get? Let's first confirm weather or not your alternators are charging. Good luck. Report back when able.

I got 11 volts both batteries pulled both they both charged fine then put them back in the truck started fine then tested voltage at alternators neither were reading anything I ordered a new alt for driver side and I am looking for a replacement for the passenger side alt now

 

[MarcusOReallyus]

From the rules you agreed to when you joined:

• Do not post in all CAPS or in giant run-on sentences without punctuation. Do not post as if texting and do avoid the use of texting abbreviations. We are not the grammar police but we want everyone to easily read your post in at least 8th grade English. It is extra work to post proper sentences from a smartphone but the result will be greatly appreciated. Please do your best to use capitalization, proper spelling and punctuation. It makes it easier for everyone to read! Note: this is a RULE, and is enforceable.

 

[Curtisje]

Download the TMs if you haven't already. They will be a big help in diagnosing and repairing the truck. Good luck.

 

[Bobbycole927]

I have downloaded the manual and read thru it. I have purchased new alternators. However on the passenger side alt there is a compensator on the back. What does this do and is it needed? Side note the alt I bought does have the bolt for the compensator.

 

[Curtisje]

I think your referring to the suppressor and it is there to reduce electrical interference with the military radios. You don't need it.

Check this post out to be sure

Capacitor question on alternator

Ok so Im rebuilding my Passenger side alternator on my 84 M1008. (NOT GROUNDED UNIT) Is the INTERNAL capacitor the same as the one on the outside connected to the ground? I hope this question makes since. I would like to get this back together tonight. Only one came with my kit. Do I have to...

www.steelsoldiers.com

 

[Bobbycole927]

I think your referring to the suppressor and it is there to reduce electrical interference with the military radios. You don't need it.

Check this post out to be sure

Capacitor question on alternator

Ok so Im rebuilding my Passenger side alternator on my 84 M1008. (NOT GROUNDED UNIT) Is the INTERNAL capacitor the same as the one on the outside connected to the ground? I hope this question makes since. I would like to get this back together tonight. Only one came with my kit. Do I have to...

www.steelsoldiers.com

I now have all of the correct voltage. Everything is charging properly however my voltage gauge or alt lights arent working.

 

[Curtisje]

I now have all of the correct voltage. Everything is charging properly however my voltage gauge or alt lights arent working.

The voltage gauge works through a relay under the dash. Maybe it needs replacing?

Are you sure the lights work? Are the bulbs good? Are the contacts in the light sockets good? You have a few things to check yet. Good luck. Hopefully someone with more experience chimes in soon.

 

[Bobbycole927]

The voltage gauge works through a relay under the dash. Maybe it needs replacing?

Are you sure the lights work? Are the bulbs good? Are the contacts in the light sockets good? You have a few things to check yet. Good luck. Hopefully someone with more experience chimes in soon.

Thank you I will start with the relay and pull the dash back apart. Hopefully I will find something.