Wiring Diagrams

In the early 1990s, MAFCA member Jim Parcelluzzi included wiring diagrams on the MAFCA Clip Art disk. You can find copies of these diagrams on the MAFCA website. Here are some specific diagrams available: 1928 Wiring Chart - 1929-1931 Wiring without Cowl Lights - 1929-1931 Wiring with Cowl Lights

2024-01-15T19:15:21-06:00

Discharging When the Ignition Is Off

We own a 1930 Sport Coupe and a 1931 Pickup. Recently, the Coupe developed an issue with discharging when the ignition was off due to a hung cutout, which we replaced. However, we encountered a short circuit problem that caused the wiring harness to melt down from the starter to the ignition switch and amp gauge, almost resulting in a fire.

2024-01-15T19:09:39-06:00

Shorts

I recently acquired a 1929 coupe, and I'm facing an electrical issue. Initially, the horn and lights weren't working, but now I'm encountering a problem where I keep blowing fuses as soon as I insert a new one into the fuse protector circuit on top of the starter.

2024-01-15T19:01:20-06:00

Routing Wires

I'm preparing to install the wiring on my 1931 Victoria, and I'm looking for reference material that illustrates or describes how and where the wiring should be routed along the frame, including the placement of wire clips. Specifically, I want to know if the clips should be attached to the upper or lower edge of the frame rail, whether they go over or under the frame, and so on.

2024-01-15T18:56:27-06:00

Alternator Wiring Issue

If you have an alternator installed, and getting a current drain through the alternator, it indicates there is a bad diode in the alternator. If you have a generator with a cutout installed, the cutout relay may be bad and not opening, allowing the battery to drain through the generator.

2024-01-15T17:37:15-06:00

Can you Convert to a 12-Volt System

The car starts easily and spins over fast, but I suspect the wiring is still set up for a 6-volt system. Can you convert to a 12-volt system without changing the wiring? If so, do the bulbs need to be 12-volt as well? I'm not confident with electrical work.

2024-01-15T17:29:33-06:00
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