Help with MK3 Ignition Switch

jaydee75 · Apr 1, 2019

I finally decided to tackle my hit/miss key switch. I took it apart and cleaned it good and on reassembly I have a memory problem: The slotted nut on top that holds the switch into the console has a wavy washer under it. I can't remember if the washer goes below (inside) the console or on top of the console. I don't see any detail in any of the pictures. It seems the screwed neck doesn't protrude up as well as it did, but I can't
believe the washer would seat above on the plastic. Any thoughts?
Thanks,
Jaydee

Dellis · Apr 2, 2019

jaydee75 said:
I finally decided to tackle my hit/miss key switch. I took it apart and cleaned it good and on reassembly I have a memory problem: The slotted nut on top that holds the switch into the console has a wavy washer under it. I can't remember if the washer goes below (inside) the console or on top of the console. I don't see any detail in any of the pictures. It seems the screwed neck doesn't protrude up as well as it did, but I can't
believe the washer would seat above on the plastic. Any thoughts?
Thanks,
Jaydee

I don’t have a mk 3 but suspect the wavy washer is supposed to go behind the the slotted nut as a locking washer. I may be wrong but that would seem the logical answer.

Dave

Danno · Apr 2, 2019

I have a plastic pretzel jug full of failed Lucas (and knockoff) ignition switches and have never had any success trying to make one work by disassembly/cleaning.

The Lucas ignition switches are not very sturdy from new and seem to wear out or malfunction frequently. Replacement is the only (temporary) fix I've found.

HoveToo · Apr 2, 2019

If the contacts were pitted you might consider putting a relay into the headlamp circuit to reduce the current in the switch. All my switches failed for that reason. The relay has fixed that problem.

tomspro · Apr 2, 2019

OR solve permanently by separating the ignition circuit from other electrics using a separate toggle type switch.
I just did it after couple of ignition failure incidents.
Not difficult.

Saber13 · Apr 4, 2019

This worked great on mine.
http://www.nocnsw.org.au/technical/rebuild-lucas-ignition-switchtobetterthannew

Help with MK3 Ignition Switch

jaydee75

Dellis

Danno

HoveToo

tomspro

Saber13

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