Sorry got wrong battery, Having problem with chassis battery.
On the you tube They are removing the wire going the the NEG post and hooking the amp meter to the battery post and battery wire, completing the circuit.
I don't have a wiring diagram, but I think the POS battery wire goes directly to the trombetta, so it should be the same. Disconnect wire, put amp meter in circuit between battery post wire and trombetta post. Like I said , may get some sparks.
I plan to check out the chassis alternator to day, and make sure it is charging, Chassis battery was replaced less than 6 months ago.
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