Wiring diagram for new holland TD 80 - 1994 Chevrolet C1500

$40 for a Service Manual? Tractor manufacturers make you pay.

https://www.google.com/search?q=New+Holland+T2410+T2420+Specs+Tractor+alternator+wiring

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I am sending you a link from where you will get the Wiring Diagram http://toolsnyou.com/

The best solution you'll get from books at www.reliable-store.com

These are books containing info on repair, service, troubleshooting, parts info, assembling dissemble, removal, error/fault codes, wiring diagrams and everything on any vehicles cars, atv, trucks. forklifts, boats, excavators etc.

New Holland Tt55 Tt55 Tt65 Tier3 2wd Tractor Service Manual New Holland Tt55 Tier3 2wd, Tt55 Tier3 4wd, Tt65 Tier3 2wd, Tt65 Tier3, 4wd, Tt75 Tier3, 4wd Tractors Service Repair Workshop Manual Download Pdf Illustrated. New Holland Tt55 Tt55 Tt65 Tier3 2wd Tractor Service Manual

I really think you should go to www.reliable-store.com they have got books on every
vehicle and also how to service/repair it, parts info, wiring diagrams, electrical diagrams, fuse diagrams, error codes, etc everything

check for bad , broken or loose ground wire --battery- gauges etc

comes up as a holland ford 6600
$ 22 for this one
Ford New Holland 5000 5600 5610 6600 6610 6700 6710 7000 7600 7610 7700...

$49 for the whole book just for wiring diagrams
http://store.payloadz.com/details/928988-ebooks-technical-new-holland-ford-6600-6610-tractor-service-repair-manual.html

images for new Holland l230 skid loader wiring

It seems a bit obvious but contact New Holland. I've just searched "wiring diagram new holland" and got a whole load of images. You'll need a magnifier though! Also try parspring.com and tractorbynet.com. either of these could be helpful.