310-8paultjustice 0 #1 Posted October 22, 2015 (edited) I'm trying to upgrade my horse to have a amp gauge. Does any body know how or where to wire the neg pos off of. doubt anyone can answer......... Edited October 23, 2015 by 310-8paultjustice Share this post Link to post Share on other sites
gwest_ca-(File Mod) 10,679 #2 Posted October 23, 2015 What is the model number of your tractor? Would like to look at the correct wiring diagram.It would be much easier to add a voltmeter and they tell you a lot more.Garry 2 Share this post Link to post Share on other sites
pfrederi 17,233 #3 Posted October 23, 2015 Many 310-8 had unregulated 3 amp charging systems. The headlights ran on AC directly from the stator. Do your head lights work if the engine is not running? if they do not than you probably have the 3 amp system...not much point in adding an ammeter. As Garry said voltmeter might be more useful. 1 Share this post Link to post Share on other sites
305 380 #4 Posted October 24, 2015 actually , i do know how to wire an ammeterthe output of the charging system goes to the + side of the gauge , the - side of the gauge goes to the + side of the battery. then all power for the system is connected to the + side of the gauge. there are no other wires connected to the gauge. this way it shows current going in or out of the battery and not what the alternator is putting outas others have said...probably won't do you much good , i prefer a volt gauge Share this post Link to post Share on other sites
Racinbob 10,567 #5 Posted October 24, 2015 Are you adding one, replacing one or? Voltmeters and ammeters tell you two different things and both have their place with a voltmeter getting the nod here. But as pfrederi said, your 310 probably has the 3 amp unregulated system and an ammeter will be practically worthless. Not so with a voltmeter. Whatever you decide, ammeters are wired in series and voltmeters in parallel. Share this post Link to post Share on other sites
