Posted by John T on November 14, 2008 at 14:12:14 from (66.244.97.31):
In Reply to: #@$%*##$ charging system posted by Gerritt in michigan on November 14, 2008 at 10:27:34:
I think you have a cutout relay (sure wish I had a pic) and if theres ONLY ONE coil/relay inside it, then Im fer sure thats all you have. However, if it has 2 or 3 coil/relays inside then its a full fledged Voltage Regulator and yes it wires different then the cutout relay systems.
Where is the gennys FLD post wired now??? Up to the dash to a LHBD switch ORRRRRRR to a F terminal on that relay?? REGARDLESS when shes running use a jumper to dead ground the Gennys FLD post n see if she charges then??? If so BUT NOT OTHERWISE its either the LHBD switch isnt wired right or dont have a good ground,,,,,,,,,or the wires bad/open from FLD on genny up to the switch....
As a precaution insure that BOTH the Genny and the Relay/VR have a good to frame ground (use a jumper wire to give BOTH a good ground n see what happens) ALSO did you POLARIZE the genny?? if not do it
Heres a part of my Troubleshooting Procedure to get you started and I will post the URL Link to the whole thing. You need EITHER the gennsy FLD post wired to a good working and grounded LHBD switch or to the FLD terminal on a good working and grounded VR OR ELSE NO CHARGE
1) For a good working Gen to get to and charge the battery, it has to have a path usually from the Gens ARM post,,,,,,,,,,to and through the Cutout Relay (between its GEN and BAT terminals, regardless if on a VR or Relay),,,,,,,,,up to the Load (NOT to battery) side of the Ammeter,,,,,,,,,to and through the Ammeter,,,,,,,,,,from BAT side of Ammeter to ungrounded battery terminal, often via the starter lug post. Is yours wired that way or equivalent ??? The ammeter should read hot battery voltage on BOTH terminals, does yours??? Even if an ammeter were stuck (but still continuous) as RPM increases the battery voltage should rise from 12.6 to near 14 volts and/or the lights glow brighter (half that on 6 volt systems). Have you tried that in case the ammeter isn’t working right?????
2) If the above is so, the BAT terminal on the VR or Cutout Relay MUST ALWAYS READ HOT BATTERY VOLTAGE. Does yours??? If not, the Gen cant get to and charge the battery.
3) The Gen to VR (if it has one) wiring is as follows:
BAT on VR to ammeters load (NOT battery) side
ARM (or GEN) on VR to Gens Armature post.
FLD on VR to Gens Field post.
(L) Load (if you have a 4 wire VR) up to BAT supply input terminal on switch to feed loads like lights and ignition.
WIRING ON CUTOUT RELAYS: They wire BAT side to ammeters Load terminal,,,,,,GEN side to gens Armature post. On cutout relay systems, the Gens Field post is wired to the light switch where it gets a dead ground for high charge or a resistive ground for low charge. Therefore, there must be a good connection from the Gens Field post up to the switch PLUS the switch is good and it’s well grounded !!!!!!!!
4. THE GEN AND VR OR CUTOUT RELAY MUST BE WELL GROUNDED AND THE BELT GOOD N TIGHT. If any doubt, run a ground wire from the grounded battery post or clean solid frame member direct to the Gen and see what happens????????????????????????????
NOW, if the Gen and VR are grounded,,,,,all is wired correct,,,,,,,,BAT terminal on VR or Cutout Relay is HOT,,,,,,,,Belt is tight,,,,,,,,,Ammeter is good n continuous n works but she wont charge, have you had the batteries tested lately????? Is there electrolyte above all the plates and no cells have a gray or milky appearance?????? A bad battery may not accept a charge you know!!!!!!!! If the battery checks okay, proceed below to see if its a Gen or VR problem (AFTER you have insured the wiring per the above)
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.
b) IF IT’S A CUTOUT RELAY SYSTEM and she charges only if you dead ground the Field but NOT otherwise, its either a bad switch or the switch isn’t well grounded or else the wires bad or open from the Gens Field post up to the switch. INSURE THAT GOOD SWITCH GROUND AND WIRING
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.
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