john deere 4110 not charging

[collin1450]

i have a john deere lv4110. serial number lv4110g112091. its not charging the battery. just had the alternator rebuilt. its the 55amp alternator not the skinny smaller alternator. the battery light is not coming on, bulb is good. iv swapped relays and made sure all fuses are good. im down to it being the voltage regulator but wanted to ask first, am i missing anything. thank you guys

 

[beenthere]

Welcome to TBN
Do you have the service tech manual for the 4110?

 

[al3]

Have you check outputs of alternator and voltage regulator with a meter? Like below has schematics, a few select test voltages. Click on the "Electrical Diag and Ops" illustration.

4110 charging issue

www.greentractortalk.com

 

[collin1450]

Have you check outputs of alternator and voltage regulator with a meter? Like below has schematics, a few select test voltages. Click on the "Electrical Diag and Ops" illustration.

4110 charging issue

www.greentractortalk.com

i read that post this morning. my diodes are there and plugged in. i ohmed out the diodes with my meter and they seem fine. both beep. battery connections are good. no power to the battery bulb in the dash. i believe thats connected to the voltage regulator

 

[LittleBill21]

am i missing something? the main lug on the alternator doesn't look connected to anything

 

[collin1450]

that

am i missing something? the main lug on the alternator doesn't look connected to anything

thats how it was when i got it. power probe says its ground not voltage

 

[LittleBill21]

that

thats how it was when i got it. power probe says its ground not voltage

look at this. interesting design

4110 charging issue

www.greentractortalk.com

 

[collin1450]

am i missing something? the main lug on the alternator doesn't look connected to anything

i work on alot of tractors its not uncommon for the lug not to be used.

 

[collin1450]

looks to me like this is the European design with the 55amp alternator not the 20 amp skinny alternator

 

[LittleBill21]

i work on alot of tractors its not uncommon for the lug not to be used.

so they are pushing 55 amps through the voltage regular wiring? that looks to be 10-12 guage at most. I have not worked with external regulator's very often.