12V Universal Electronic Flasher/Hazard Relay 21Wx2 + 5W

  (3 Reviews)
Price:  £15.88   (£13.23 Exc. VAT)

Product code:  P00971



3 in stock

Universal 12V electronic flasher and hazard relay that can be used to operate incandescent indicator bulbs in most vehicles. Operation is as follows:

  • Operating as a flasher - 2x21W + 5W (front and rear 21W indicators, plus an optional 5W side repeater)
  • Operating as a hazard unit - 4x21W + 2x5W (2x front and 2x rear 21W indicators + optional 2x5W side repeaters)

Maximum capacity is 98W total.

Supplied with loose metal bracket for fixing. 


Terminal No.



To earth / ground


From +12V supply


To indicator switch (selecting left/right or off)


To dash panel warning lamp






Please note: not for use with LED bulbs.

  • Voltage rating: 12V DC
  • No terminals: 4
  • Terminal size: 6.3mm blade
  • Bracket type: Loose metal bracket supplied or use relay holder P00708
  • Overall dims (inc. terminals, exc. bracket): 30 (L) x 30 (W) x 51 (H) mm

Part Number:  GFL5

Average Rating (3 Reviews):  
Write a Review and share your opinions!

Indicator flasher
Thursday, 6 May 2021  | 

Just what I needed for a trike i am building.

Brilliant product
Tuesday, 16 February 2021  | 

5 star service

Perfect for cars with questionable Earths
Monday, 10 February 2020  | 

I used this on a 1978 Spitfire where the original Lucas units use the body of the flasher unit as Earth, usually unsuccessfully. The additional connections on this unit allowed me to fit a dedicated earth lead and a warning buzzer to show that the indicators were in use (not easily noticeable in a convertible). Very pleased with the product.

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