Lights Warning Buzzer

A simple circuit to remind you when the lights are on.

Written by Skye Nott – 2006-04-02
How-To Library > Electrical and Instruments Section

Here's a simple schematic for a warning buzzer that will sound if you've left your lights on. I'm afraid I can't remember where I found it, but if you've got a few spare relays and are handy with a soldering iron you shouldn't have much trouble figuring it out.

Note that only later MGBs have door switches. See Joshua's comment below for more info.

Simple Schematic for Accessory Lights-On Warning Buzzer

Schematic for Door Open Lights On Warning Buzzer

— Lights Warning Buzzer —

Written by Skye Nott – Created 2006-04-02 Published 2006-04-02
Contents © Copyrighted and published under the following terms:
Copyright © the author and published by permission or fair use.

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Member Comments on Lights Warning Buzzer ↵

2008-11-14 15:23:10 # 1172

Comment by Joshua Saffren

Skye, thanks for the idea. I removed the seatbelt safety systems from my 1974 1/2 MGB so I was able to take advantage of the extra, blue, driver's side door switch to provide current to the buzzer when the marker-light relay is thrown. In fact, I was able to take advantage of the always-on-when-ignition-off slate colored wire off the ignition (for the anti run-on valve). I ran the market-light wire from the fuseblock red-wire terminal set, and spliced another jumper to the anti run-on valve wire. Now, the buzzer sounds if the lights are on, the door is open, and the ignition is off!

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