Ammeter wiring on 12v system

[Cutty]

I have a 51 with a 12v alternator, the ammeter is not hooked up. which wire do I cut to hook it up in series? Thanks

 

[JMOR]

I'm a little lazy today, so I direct you to post I put up for an earlier model, but other than a solenoid vs start switch & 3 terminal terminal block with resistor vs 2 terminal w/o resistor , they are similar & ought to get you there.
However, in those 12v conversions, there is no telling how you are currently wired.
I can't really do much better unless you can post a diagram of your current connections.
http://ytforums.ytmag.com/viewtopic.php?t=577675

The GENERAL answer is that the ammeter belongs in the wire connecting to the battery (generally picked up at start switch of solenoid on the terminal connected to battery cable.
Feel free to come back with questions.

 

[440roadrunner]

An ammeter wants to have ONLY the battery on one terminal, and the charging system and all loads--except the starter, on the other post.

If it reads bassackwards, just reverse the leads.

You may have to do some rewiring/ rerouting to achieve this. This can occur, for example, when the starter/ switch / solenoid terminal is used as a "junction" to take off to the loads (lights, ign) and also brings in the charging line from the alternator or from BAT terminal of the regulator on a gen. system

A basic block:

http://holdenpaedia.oldholden.com/images/a/a5/AmmeterWiring.jpg