39 volt meter

[adileo]

It's probably pretty obvious by now, I'm trying to learn as much as I can about my new ride.

What feeds the volt meter? I still want my gauge to work - I'm told when I replace my 6 volt generator with the new look alike 6 volt alternator I tape off existing wires.

Curious what feeds the volt meter.

Thanks

[19Fordy]

Here's a 39 Ford wiring diagram
You have top click on the link in one of the threads. It will show the Van Pelt diagram. Notice the 39 uses an AMP METER.
https://www.fordbarn.com/forum/showth...wiring+diagram

Posting # 2 in the thread below has the link for the 1940 Ford wiring diagram. It is a volt meter.
https://www.fordbarn.com/forum/showth...wiring+diagram

[adileo]

Maybe Standard uses amp - I have 39 deluxe with two wires on gauge so pretty sure its a volt meter

[19Fordy]

Originally Posted by adileo

Maybe Standard uses amp - I have 39 deluxe with two wires on gauge so pretty sure its a volt meter

You are correct. I recall this was discussed in earlier discussions a while ago.

[G.M.]

The 39 volt meter measures the average battery voltage and does not show rapid changes like a regular volt meter. The connection from the alternator to the battery will provide the voltage to the gauge. I left the voltage regulator on my 39 after I put the alternator on. If I recall I moved the arm wire over with the battery connection on the regulator and taped the field wire off at the generator end. The arm wire provides voltage to the alternator. I have a single wire alternator. My 6 volt alternator is in a Ford generator shell so it still looks stock. G.M.

[adileo]

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GM that sounds like exactly what I'm doing - currently I have two wires to my geni - one on back and one on side - Are you saying the one on the side is ARM and I need to run it w the 8 gauge wire to the battery from the new Alt?

[19Fordy]

When I converted to 12V I did the same thing as GM on my 40 as shown below.
On my 40 DeLuxe I also ran a jumper wire between the 2 terminals of the circuit breaker that is under the dash. It's the wire with the blue connectors shown below.
Then I ran an 8 gage wire with a fusible link from the terminal of the one wire alternator to the negative side of the solinoid where the battery is also attached. My car is 12 volts, negative ground.

[Clem Clement]

My gauge quit working. I have an ammeter as well at it works Ok. Now what?

[G.M.]

Originally Posted by adileo

GM that sounds like exactly what I'm doing - currently I have two wires to my geni - one on back and one on side - Are you saying the one on the side is ARM and I need to run it w the 8 gauge wire to the battery from the new Alt?

The large wire is the arm and the small the field. G.M.

[G.M.]

Originally Posted by Clem Clement

My gauge quit working. I have an ammeter as well at it works Ok. Now what?

Check and see if you have voltage to the gauge. G.M.