12V Universal 'Lights On' Warning Relay/Buzzer - 72 db

  (8 Reviews)
Price:  £15.18   (£12.65 Exc. VAT)

Product code:  P00970



6 in stock

Universal 12V warning relay for use where an indication that the lights have been left on is required when you open the vehicle door. Features a piezoelectric buzzer operating at 72db volume and is powered from a +12V input from the headlight switch. The buzzer is triggered by a connection to the door switch that becomes earthed when the door is opened. Terminal C can be connected to an ignition switched live so that the buzzer can be cancelled with the door open by turning the key to the ignition accessory (ACC) position.

Listen to the buzzer sound here  


Terminal No.



+12V from sidelight/headlight switch

1I (or L)

Not used


Ignition switched live (ACC) to cancel buzzer

 I (or 1)

Earth/ground from -ve switched door switch
  • Voltage rating: 12V DC
  • No terminals: 4
  • Terminal size: 6.3mm blade
  • Bracket type: Fixed moulded or use relay holder P00708
  • Overall dims (inc. terminals): 30 (L) x 30 (W) x 56 (H) mm

Part Number:  GLR3

Average Rating (8 Reviews):  
Write a Review and share your opinions!

Buzzer relay
28 May 2024  | 

Fab.. works well.

Good little buzzer
09 August 2021  | 

Wired this into our 1997 Hiace van as a lights on buzzer. Hopefully no more flat battery in winter when lights get left on. Easy to follow wiring diagram. Initially placed under bonnet but moved under dash to make louder. Used the ignition connection to disable when ignition on.

lights on buzzer /iluminated toggle switch
18 December 2020  | 

nice littel tool other buzzers i bought were not as loud as this one... mind you i am a little deaf......maybe i should fit a car horn ......but cant fault the service very prompt and knowledge centre is very very helpful and i like the iluminated toggle switchs used one to replace the demister switch on my jimny it is not a direct replacement but a lot cheaper . will br ordering more as needed

Good Quick Service
11 November 2020  | 

Ordered parts from this company and the part turned up quickly and good on price.

Perfect for an old Land Rover
13 February 2020  | 

One connection to ‘ignition on’ 12V, one to the side light switch and a wire to ground, I have a very useful little alarm to let me know I’ve left my lights on. Works a treat.

Quality seems good
05 October 2017  | 

I've not had a chance to fit this yet. But the build quality seems very good and delivery etc was on time.

A g

Good product
04 April 2016  | 

Fast service. Good product.

Does what it says
19 October 2015  | 

Good customer service , quick delivery and on time.
The warning buzzer was really easy to fit and works Very well.
Cheers guys

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