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> Key-in-ignition, Wired to the buzzer ?
jim_hoyland
post Nov 5 2015, 09:20 PM
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Was the ignition switch wired such that the warning buzzer would sound if the key was left in the ignition switch. The 911 ignition switches do for sure, how about a 914 ?
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zambezi
post Nov 5 2015, 10:05 PM
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Yes, mine does....'73.
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sb914
post Nov 5 2015, 10:07 PM
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QUOTE(jim_hoyland @ Nov 5 2015, 07:20 PM) *

Was the ignition switch wired such that the warning buzzer would sound if the key was left in the ignition switch. The 911 ignition switches do for sure, how about a 914 ?

My blue car does Jim 73
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toolguy
post Nov 6 2015, 12:17 AM
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Yes. . the 'buzzer' is what looks like a relay on the fuse tray under the dash. . except that this relay is red. . what makes the buzzing is the fact the relay is wired internally so it has a contact in the operate circuit so that as soon as it operated, the contact opens the path and the relay releases. . does this as fast as it can and causes a buzzing chatter.

If you don't like the buzzing, simply remove the relay. .
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rgalla9146
post Nov 6 2015, 06:22 AM
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QUOTE(toolguy @ Nov 6 2015, 01:17 AM) *

Yes. . the 'buzzer' is what looks like a relay on the fuse tray under the dash. . except that this relay is red. . what makes the buzzing is the fact the relay is wired internally so it has a contact in the operate circuit so that as soon as it operated, the contact opens the path and the relay releases. . does this as fast as it can and causes a buzzing chatter.

If you don't like the buzzing, simply remove the relay. .


Isn't the buzzer a rectangular black one ?
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jim_hoyland
post Nov 6 2015, 06:39 AM
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OK; Now, what wire goes from the ignition switch to the buzzer ? I'm trying to re-establish the connection(s)

I assume that the connection is a ground type: key-in maintains the ground to the buzzer; key-out breaks the ground connection and ends buzzing. So, I need the wire color code and or connector on the ignition switch it goes to.


Attached image(s)
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CooltimesJr
post Nov 6 2015, 06:24 PM
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got an ohm meter? i'm wondering if the two smaller male connectors are completed when the key is inserted into the cylinder. If I still had all of dad's old FSM's I could tell you right away. (IMG:style_emoticons/default/headbang.gif)
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jim_hoyland
post Nov 6 2015, 06:45 PM
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QUOTE(CooltimesJr @ Nov 6 2015, 04:24 PM) *

got an ohm meter? i'm wondering if the two smaller male connectors are completed when the key is inserted into the cylinder. If I still had all of dad's old FSM's I could tell you right away. (IMG:style_emoticons/default/headbang.gif)



I'll give those a try
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jim_hoyland
post Nov 8 2015, 06:42 PM
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I had a change to do some testing on a switch that is out of the car. There are 3 large spade tetminals: 30, 50, 15, X; and there are two small spade connectors: P and S

P has continuity with 30 a disused for the parking light function when the TS lever is left on and ignition is off.

S would have continuity with 30 whenever the tip of the key is inserted, continuity was observed in all key positions including off; pull the key ou and it breaks continuity..

I'm still trying to figure out how this circuit might trigger key-in-ignition warning buzzer

Any ideas ? I thinking relay, but not sure how.....
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jim_hoyland
post Jun 24 2025, 08:26 PM
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Still trying to figure this out….
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Superhawk996
post Jun 24 2025, 08:38 PM
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Wiring is different early vs late.

What year?
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JeffBowlsby
post Jun 24 2025, 08:42 PM
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The buzzer on a 74-76 car is internal to the seatbelt relay interlock box. Have you bypassed this interlock box?

Edit: SH beat me to it!
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Superhawk996
post Jun 24 2025, 08:51 PM
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QUOTE(JeffBowlsby @ Jun 24 2025, 10:42 PM) *

The buzzer on a 74-76 car is internal to the seatbelt relay interlock box. Have you bypassed this interlock box?

Edit: SH beat me to it!

Would be awfully funny if we can help him get er’ operational based on the schematic and the write up on the interlock relay.

FWIW - I’ve been highly distracted. Was on a massive road trip and now having a septic system installed for the garage. When that’s done I’ll get back to finishing the write up on the relay box and hopefully fixing that in-op one. @JeffBowlsby @Bdstone914 @montreal914
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JeffBowlsby
post Jun 24 2025, 09:11 PM
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Thx for the update, I figgurd you may have been distracted. No worries. We appreciate your efforts on this mystery black box.
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JeffBowlsby
post Jun 24 2025, 09:12 PM
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Thx for the update, I figgurd you may have been distracted. No worries. We appreciate your efforts on this mystery black box.

I think it would be cool if it could be easily achieved, if the door buzzer and dash light could be preserved, but the troublesome ignition interlock function could be disabled.
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jim_hoyland
post Jun 25 2025, 09:28 AM
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QUOTE(Superhawk996 @ Jun 24 2025, 07:38 PM) *

Wiring is different early vs late.

What year?


‘75
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jim_hoyland
post Jun 25 2025, 09:28 AM
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QUOTE(JeffBowlsby @ Jun 24 2025, 07:42 PM) *

The buzzer on a 74-76 car is internal to the seatbelt relay interlock box. Have you bypassed this interlock box?

Edit: SH beat me to it!


Yes
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Root_Werks
post Jun 25 2025, 09:39 AM
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I used this wire to power the "on" for my radio. Radio is on whenever the key is on. On my 75' 914, thought the wire was solid grey? Maybe I can have a look and report back.
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JeffBowlsby
post Jun 25 2025, 10:42 AM
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Chassis harness schematic says its the grey/brown wire. Please verify.
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Steve
post Jun 25 2025, 10:49 AM
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Mine is also a 75. I bought a VW buzzer and was going to hook it up, but never got around to it. Future project with all my other future projects.
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