| Diagram | Fig. 36 — HEADLAMP AND FLASHER LAMPS · ref 20 |
| Listed in parts books | Not catalogued by year yet |
| Also fits (as replacement) | 1966–1970, 1973–1974, 1976–1977 · for 31899, 99-0558 |
IGNITION SWITCH LUCAS 2 POSITION (Replaces 99-0558 54531899) Use lock tumbler 54315070
Lucas two-position ignition switch, the factory replacement for the earlier 99-0558/31899 switch.
This is the Lucas two-position ignition switch, PN 30608. It's the electrical key switch, straightforward on/off duty for the ignition circuit, and it's the part the factory later substituted in when the older 99-0558 (also seen stamped 54531899) went out of production.
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If you're chasing a lock tumbler to go with it, the catalog calls out tumbler 54315070 as the one to use with this switch body.
We don't have a lot more detail on file for this one beyond the basics above. If you've got an older parts book listing 99-0558 or a number ending in 31899, that's this same switch under its earlier factory number — give us a call and we'll confirm it's the right one before you order.
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