Thanks to David Ballantine for this information. It is for a US spec 1974 car, but should cover most MK3's.

Click here for the wiring diagram.

Fuse Locations

Fuse Block `A' (located in engine bay at front)

Fuse Pins 1-2 (25a) Fuel, Temp Gauges, Horn Relay, Flasher and Reversing

Lamps

Fuse Pins 3-4 (50a) Heated Rear Window

Fuse Pins 5-6 (50a) Headlamp Flasher Relay

Fuse Pins 7-8 (50a) Radiator Fans

Fuse Block `B' (located in engine bay at front)

Fuse Pins 1-2 (35a) Right Hand Headlamp Main Beam

Fuse Pins 3-4 (35a) Left  Hand Headlamp Main Beam

Fuse Pins 5-6 (10a) Right Hand Side lamp Front and Rear

Fuse Pins 7-8 (10a) Left Hand Side lamp Front and Rear

Fuse Block `C' (located in engine bay at front)

Fuse Pins 1-2 (35a) Right Hand Headlamp Dip Beam

Fuse Pins 3-4 (35a) Left Hand Headlamp Dip Beam

Fuse Pins 5-6 (35a) Brake Warning Light and Windshield Wiper

Fuse Pins 7-8 (35a) Horns and Interior Lights

Inline Fuses

Inside  Fuse box in engine bay.  1 only  (?a) interior Lights, Clock and

Cigar Lighter.

Underneath Gearshift Panel  1 only  (35a) Left Side Window

Underneath Gearshift Panel  1 only  (35a) Right Side Window

Behind Glove Box   1 only (35a)  Shaver Socket (or Battery Charger)

Behind Glove Box   1 only (35a)  Heater Motor *

Removable Panel by Steering Column 1 only (25a)  Hazard Warning Lights

and Fuel Flap **

Radio has an inline fuse near behind the Radio.

If fitted with Fog Lamps their is also an inline fuse but do not know

where it is located.

By my count that makes a total of 20 and 1 more if Fog Lamps are fitted