( Image by David Farrar on the MGOC Forum)
#Laycock overdrive p type manual
This picture shows the yellow wire from the manual switch coming out of the main harness, joined to a yellow/red going into the gearbox harness. But a fault in the OD or TCSA wiring will also cut off the fuel pump, so it is better to use two fuses - one in each of the wires coming from the 4-way bullet connector at B.
However there is also position B: In the wire from the inertia switch a single fuse will protect the OD, TCSA and fuel pump. LH type with ignition relay - North America (77-on):Ī fuse inserted at A will protect both the OD and the TCSA circuits, this is probably where the gearbox harness joins the main harness. On cars with the gear-lever mounted switch to protect the most wiring a fuse can only be inserted at A where the gearbox harness joins the main harness. LH type with ignition relay - UK (77-on):
On cars with the column switch - to avoid cutting wires - insert it at B where the gearbox harness joins the main harness below the pedal box. On cars with the dash-mounted manual switch to protect the most wiring insert the fuse in the white wire at A where it connects to the back of the switch. LH type without ignition relay (68-76 and V8):
Overdrive - LH-Type LH type without ignition relay LH type with ignition relay - UK LH type with ignition relay - North America Location of gearbox switch