help with wiring issue

[5 Forward]

I am rewiring my Ford 600 early Ser # 7545. It had been converted to 12 volt alternator by the previous owners. The wiring was aged so I am replacing
it. I decided to go all out and replace the ammeter with a volt meter and put a light in instead of the diode using the terminals 1 and 2. The no. 1
terminal wire to the light and post on the terminal block. On that same post of the terminal block I have the ignition wire(power to the ignition coil) the volt
meter and power to the starter solenoid and one side of the key switch. The other terminal of the terminal block has 12 volt from the battery side of
the solenoid, the no.2 terminal from the alternator and one side of the key switch. The 12 volt terminal on the alternator to the battery side of the
solenoid. The tractor running I am getting 16 volts on the volt meter and I double check that with another meter and only 12.5 volts at the battery and
on the alternator. I also get 16 volts on the terminal block. I had the alternator checked and it checked good. Can any electrical wizard tell me where
I have gone wrong.

 

[JMOR]

(quoted from post at 19:15:38 08/01/20) I am rewiring my Ford 600 early Ser # 7545. It had been converted to 12 volt alternator by the previous owners. The wiring was aged so I am replacing
it. I decided to go all out and replace the ammeter with a volt meter and put a light in instead of the diode using the terminals 1 and 2. The no. 1
terminal wire to the light and post on the terminal block. On that same post of the terminal block I have the ignition wire(power to the ignition coil) the volt
meter and power to the starter solenoid and one side of the key switch. The other terminal of the terminal block has 12 volt from the battery side of
the solenoid, the no.2 terminal from the alternator and one side of the key switch. The 12 volt terminal on the alternator to the battery side of the
solenoid. The tractor running I am getting 16 volts on the volt meter and I double check that with another meter and only 12.5 volts at the battery and
on the alternator. I also get 16 volts on the terminal block. I had the alternator checked and it checked good. Can any electrical wizard tell me where
I have gone wrong.

ust sounds like your new voltmeter isn't very accurate. Measure across it's terminals with your hand held meter & compare.