My Tractor Forum banner
  • Are you passionate about Tractors? Would you like to write about topics that interest you and get paid for it? Read all about it here!
1 - 8 of 8 Posts

·
Registered
Joined
·
7,939 Posts
Discussion Starter · #1 ·
Anybody ever add a charge warning light? :dunno:

I was reading about a charging issue on another brand of tractor.

Someone referred to the manual.

The manual makes it sound simple to add a charge warning light.

GENERATOR WARNING LAMP
Inspection
The generator warning lamp is connected between the
generator (G) terminal of the voltage regulator and the
light, (A) on ignition switches with 4 pins, and terminal (L)
terminal of the ignition switch with 5 pins. If the generator
output is at a higher voltage than the battery, no current
flows through the lamp and it remains extinguished. If the
generator output is at a lower voltage than the battery,
current flows through the lamp and causes it to
illuminate.
To check the generator warning lamp, disconnect the
wire from its terminal on the lamp. Then use a multimeter
to check the resistance across the lamp terminals. Begin
with the red (+) multimeter lead on the terminal where
the wire was connected and the black (-) lead of the
multimeter on the other lamp terminal. The resistance in
this direction should be high (500 ohms or higher). Then
reverse the multimeter leads on the lamp terminal. The
resistance in this direction should be much lower. If not,
the generator lamp is bad and should be replaced.

Sounds like a light bulb, holder, and probably a diode.

Seems like a good alternative to a ammeter when you should be keeping your eyes on what you are doing!!
 

·
Sears Fan
Joined
·
1,281 Posts
I burnt up my ammeter, and have yet to replace it. I would be perfectly satisfied with a charging light. I started a thread about this a while ago, but the answer didn't seem clear, so I never tried it. I think now I'll try it.

http://www.mytractorforum.com/showthread.php?t=214824
 

·
Registered
Joined
·
1,946 Posts
I've got to try to get mine properly wired up, thanks for posting the short paragraph. Seems simple enough, but it's kind of confounded me up to this point.
 

·
Registered
Joined
·
7,939 Posts
Discussion Starter · #4 ·
I've got to try to get mine properly wired up, thanks for posting the short paragraph. Seems simple enough, but it's kind of confounded me up to this point.
Gen terminal of regulator - light bulb - diode - batt terminal on switch

Apparently you can see the voltage drop / rise with the bulb.

The diode makes sure you only see discharge, it turns off the light during charging.

Reverse the diode if the light comes on during charging.

That is my guess . :dunno:
 

·
Sears Fan
Joined
·
1,281 Posts
I've never heard of using a diode - only an incandescent 12v bulb and socket - in fact, that's what my colt 2712 has. I wish it was here so I could see how they wired it in...
 

·
Registered
Joined
·
1,946 Posts
No diode on my old Suburban 12 either, just some wires and an incandescent as well.
 

·
Farm Show
Joined
·
5,382 Posts
On my '66 Chevy there was a small oval light that said GEN and the light was red when there was a charging issue. The light would even flicker/fade when something was going on. I dont see a problem if you wanted that on your tractor. Most notiably in my case was the 425hp engine I had in my '72 Chevy.
 

·
Sears Fan
Joined
·
1,281 Posts
No diode on my old Suburban 12 either, just some wires and an incandescent as well.
Can you post up how your light is wired? :thanku:
 
1 - 8 of 8 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top