Clock

Clock – Electrical (1937-1972 Passenger, 1939-1970 Mercury)

This category supports the Electrical system for 1937-1972 Passenger, 1939-1970 Mercury applications by covering the dedicated wiring that supplies and illuminates the dash clock assembly. The clock circuit is a low-amperage branch that relies on stable power feed and clean ground continuity to maintain consistent timekeeping and dash illumination.

Unlike ignition or lighting circuits, the clock feed power is typically constant battery power. Any resistance in the feed wire, socket connection, or ground path affects operation. In many restorations, a non-functioning clock is traced to degraded wiring or poor terminal contact rather than internal clock failure.

This subsystem includes the wiring that delivers power and lighting to the clock and, in some configurations, shared illumination circuits with the lighter. Correct routing behind the dash is critical to prevent abrasion against metal bracing and instrument cluster edges. Clock wiring is often overlooked during harness inspection, but voltage drop and loose sockets are common service issues.

Technical & Fitment

Clock circuits use a dedicated feed wire to provide continuous power to the clock mechanism. The Electric Clock Power Wire and Clock Feed Wire maintain that supply from the fuse panel or battery source. Any corrosion at the terminal ends can interrupt current flow and cause intermittent time loss.

Dash illumination is handled through the Clock & Lighter Dash Light Socket Wire and Clock Wire & Socket Assemblies. These components secure the bulb socket in the clock  housing and provide grounding through the cluster structure. If the socket loses tension or the mounting surface corrodes, the dash light may flicker or fail.

Fitment will vary by model year. Within the confirmed 1937-1972 Passenger, 1939-1970 Mercury range, connector style and routing differ by instrument panel design. Always match terminal configuration and harness length to the specific dash layout.

Verify power and ground continuity before servicing the clock assembly.