What is This?

[Mitchka]

It appears to me as some sort of over-ride switch. It has 4 wires, two coming to it, two leaving it. When button is up (current state), it allows no power to pass through it. When the button is depressed, it allows power to pass through it.

When depressed, it does not appear to be limiting electrical flow, it just seems to be either fully on, or fully off. And I have no clue what it does.

The amazing Hynes manual says nothing about it either. If you know anything about the boxes on the firewall by the battery, please let me know!

[Mitchka]

Here's the Bauble

[sblake01]

Here's your answer posted by member St.stephen about 6 years ago (12/22/2002):

according to the NISSAN 1974 260Z Service manual (p/n 20041 1973) That button is part of the starter interlock system (except for Canada). ......"

From the manual

Description: The starting system of S30 models is provided with STARTER INTERLOCK DEVICE in accordance with MVSS 208.

The engine can be started and the warning buzzer and light will not activate only when every front seat occupant observes the following requirements for starting the engine.

(1) Seatbelt is fastened after occupant is seated

(2) When none of the seats are occupied

If the engine stops the starter interlock device will allow restarting of the engine any of the following conditions

(1) the ignition key remains turned to the "ON" position

(2) The driver remains seated

(3) It is within 3 minutes after turning the ignition key to the "OFF" or "ACC" position

In an emergency the engine can be started by observing the following

(1) Turn the ignition key to the "ON" postition

(2) Push the switch button inside the engine compartment

(3) Turn the ignition key to the "START" position

[Mitchka]

You are wonderful! Thank you!

[sblake01]

You need a 74 260Z FSM? Go to this site and download one. It's missing the 'Contents and Forward', 'GI General Information', and 'ET Engine Tune-up' sections but it has everything else. He's got a lot of useful info there and though the scan quality could be better on some of them, they're usable.

[280~Master]

That is a part that needs to be keeped n restored. Its a hard to find part.