Falcon (XK-XP)

1960-1966 / Sedan / Convertible / Estate / Australia

All Falcon (XK-XP) problems All workshop issues

Common Electrical

Generator Charging Issues

Symptoms

Battery goes flat, ammeter shows discharge while driving, dim lights at idle.

Cause

Early Falcons (XK, XL) use a generator rather than an alternator. Generators produce less output at low rpm, the brushes and commutator wear, and the external voltage regulator's points corrode. Combined with a 6V system, charging capacity is marginal.

Fix

Recondition the generator (new brushes, commutator cleanup) or convert to an alternator.

An alternator conversion is straightforward and provides dramatically better charging, particularly at idle.

Many owners combine the alternator conversion with a 6V-to-12V upgrade.

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Other known issues

Critical Electrical

6-Volt to 12-Volt Considerations

Dim headlights, slow cranking, inability to run modern accessories, difficulty finding replacement bulbs and components.

Critical Electrical

Corroded Wiring and Failed Earths

Intermittent electrical faults: lights flickering, instruments dropping out, indicators not cancelling, horn intermittent, starter motor sluggish.

Critical Rust (The Big One)

Floor Pan Corrosion

Visible rust perforation on the underside of the floor. Soft, spongy metal when prodded. In severe cases, daylight visible through the cabin floor.

Critical Rust (The Big One)

Sill (Rocker Panel) Rot

Bubbling paint along the lower body sides, soft metal when prodded, visible perforation.

Common Rust (The Big One)

Boot Floor and Spare Tyre Well

Rust in the boot floor, water pooling in the spare tyre well, perforation around the tail-light mounting points.

Common Rust (The Big One)

Lower Quarter Panels

Bubbling, blistering, or perforation on the lower rear quarter panels behind the rear wheels.

View all 18 Falcon (XK-XP) problems