Generator light

   / Generator light #1  

japody

Platinum Member
Joined
Oct 19, 2013
Messages
827
Location
Richmond & Boydton VA
Tractor
Ford 4000 & 5000, New Holland TN65, Mahindrda 2516
This is a weird one. Replaced the battery on my '69 5000 yesterday. Now the gen light gets brighter the more I rev the engine. Shouldn't it be the other way around. Any thoughts, ideas on how to fix? Thanks in advance.
 
   / Generator light #2  
I like to never found this up in the NH section. ;)

Ok, where I left off from private mail.

Have you repolarized the generator?

Bat to field and armature. ( pull arm and field wire off he, from reg, when you do this )

If that doesn't help,

When you turn key on, do you get oil and charge lamp on?
( check fuse at harness behind cluster )

If still no, motor test Gen.

Same as polarizing, almost.

Loose Gen, slip belt off, retighten brackets, need good ground. Apply bat hot to armature..might spin weekly. Apply bat hot to arm and field, should spin real good, like an electric motor. If not, it needs a trip to the doctor.

If yes, try one more thing.

Get belt back on, start her up, get rpms mid throttle. Still red lamp? Yes, put meter across battery. 12.6 is nominal, 13.2-14.x is charging.. Lower rpms charge lower on a dc generator.

Now.. Is it showing 13+?

If not remove field wire and jump Gen field to bat hot. Meter should show good charge. If not, and he passed motor test, next jump arm to bat hot, if this shows charge, your prince of darkness vreg needs looking at. Sometimes you can pull the cover and clean them up, other times.. Replace as needed.
 
   / Generator light
  • Thread Starter
#3  
I won't be able to get to the tractor for a few days. Will test as you have outlined and report back with findings. Thanks for the directions.
 
   / Generator light
  • Thread Starter
#4  
It was the generator. Will be replacing with an alternator. Thanks for the help.
 
   / Generator light #5  
good deal... it will work.
 
   / Generator light
  • Thread Starter
#6  
Thanks for the guidance. It was spot on.
 

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