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Farmall & IHC Tractors Discussion Forum
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Super c wiring/lights

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Need To Know

12-04-2007 02:51:22




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Bought a Super c,original 6v positive ground,not charging.Previous owner rewired.I had the generator rebuilt and put on a new voltage regulator.When the tractor is not running and you pull the on/off switch to on it shows a discharge of around 2.With the switch off and you turn on the lights it shows no dishcharge on the ammeter,but lights are on.With tractor running (with or without lights on)it shows a dishcharge of 2 or 3.Previous owner wired wrong? or did I get a bad voltage regulator?I had to plow snow last night and by the time I was done (running lights) dead battery!!thanks in advance.

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John T

12-04-2007 06:53:21




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 Re: Super c wiring/lights in reply to Need To Know, 12-04-2007 02:51:22  
I think Ima thinkin like Bob for now cuz what you describe makes me think (wired wrong) the following:

Sounds like the ignition switch is being fed voltage as it should cuz of that discharge when its turned on. (Id expect 3 amps or a lil more)

HOWEVER if the lights work but turning them on doesnt cause the ammeter to show discharge THE LIGHT SWITCH ISNT BEING FED FROM WHERE IT SHOULD BE ????? It may well be (if its miswired at ammeter like Bob mentioned) fed off the wrong side of the ammeter. The supply side of the ammeter should only have one wire to the battery or starter switch while its other load side wires to the BAT terminal on a 3 pole Voltage Regulator PLUS feeds hot batetry voltage to lights n ignitiion switches UNLESS its a 4 pole VR in which case they are fed from the extra 4th LOAD VR terminal

IFFFFF F the lights are fed from the same ammeter terminal that wires to the battery instead of over on the correct load side (that wires to BAT on VR) they will work but NOT register on the ammeter.

Sooooo ooo you gotta first get her wired per Bobs diagrams,,,,, ,,,then Polarize the genny just in case,,,,, ,,then see if she charges and if working through his flow chart dont disgnose the non chargign problem I have a long winded troubleshooting procedure to try next, heres a shortened version in the meantime to see if its a VR or a genny problem MAKE SURE THE GENNY N VR BOTH HAVE GOOD GROUNDS FIRST.

TO DETERMINE IF ITS A GEN OR VR OR CUTOUT RELAY PROBLEM

5. a) VOLTAGE REGULATOR SYSTEM: With the tractor running, temporarily ground the Gens Field post to case. If she charges then but NOT otherwise, the VR may be bad, or a wires missing from VR's Field post to the Field terminal on the VR, or the VR isn’t well grounded.

6. If she still don’t charge, leave the Field grounded and jump a wire across from the VR or Cutout Relays BAT terminal over to its GEN terminal (jump by passes the cutout relay) and see if she charges. If then but not otherwise, a VR's cutout relay isn’t working correct (maybe points burned/carboned) or a Cutout Relays NOT working or not wired correct.

7. With the 2 steps above, you have basically by passed the VR or Cutout relays functions, so if she still don’t charge, you're left with a bad battery or wiring or the Gen itself.

John T

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Bob M

12-04-2007 06:15:05




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 Re: Super c wiring/lights in reply to Need To Know, 12-04-2007 02:51:22  
First off there’s a wiring error somewhere - probably at the ammeter. If the wiring is correct, with the engine stopped and with the lights "on" the ammeter will indicate a bit over 10 amps discharge.

You'll need to find and correct the wiring error before proceeding. A wiring diagram for your Super C can be found as image #2 at the link below. (Note: The diagram titled for a Super H/M - however the Super C should be wired the same)

----

Once you have the wiring correct run the engine and see if the battery now charges. With luck you will have solved the problem.

However if the ammeter still shows no charge, work through the step-by-step troubleshooting flowchart at image #15 below to isolate the problem.


Hope this helps!

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glennster

12-04-2007 05:50:38




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 Re: Super c wiring/lights in reply to Need To Know, 12-04-2007 02:51:22  
search the archives for posts from john t. he has an excellent charging system analysis, easy to follow, and if you follow is test proceedures from start to finish, and your tractor still doesnt charge, its possessed by demons!!!



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ScottyHOMEy

12-04-2007 04:29:46




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 Re: Super c wiring/lights in reply to Need To Know, 12-04-2007 02:51:22  
Sounds like you might have another issue, but did you polarize your generator?

Get a good charge on your battery, then just quickly touch a jumper wire between the BAT and the GEN terminals on your regulator.

If doing that makes a difference (or not), you'll be a lot further on toward figuring out whether there's something else wrong.



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