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Land Rover Series II/IIA hazard lights

Posted in Land Rover on 30 Mar 2010 at 18:19 UTC

This guide explains how to add hazard lights to a series II/IIA land rover, the wiring should also work for a series III, but the locations of some electrical components will be different.

I assume you have a basic knowledge of working with electronics and are capable of noticing if somthing is wrong, or changing these instructions to suit your vehicle. I will not take any responsibility if your Land Rover catches fire, explodes or turns into a civilized, reliable or economical car.

You should disconnect the battery before playing around with things, Land Rovers are very sparse with fuses to begin with and anything could be wired up if a PO has been at it. If the wiring doesn't match what you expect, a multimeter will help you find out what's been done.

This wiring diagram shows how my hazard lights and indicators are wired up, it may be helpful as a reference while you are working.

You will need the following parts:

All of these parts can be bought from Halfords, Maplin, etc

First thing to do is find your indicator flasher, this is normally behind the dash panel, there are several variants. Mine is a metal cylinder screwed to the bulkhead. Once you have located the flasher, connect a new wire to the supply (battery) wire using a piggyback connector, you could also splice the wires together if you don't mind altering the original electrics. Connect the other end of the new wire to the battery terminal of the hazard flasher.

Find somewhere to fit the switch and connect one side of each pole to the output terminal on the hazard flasher, this can be done by connecting the flasher to one pole and the second pole using a piggyback connector or by crimping a wire for the second pole in the same connector as the first one. Connect the other side of each pole to either the left or right indicator circuit, there are a pair of 4-way bullet connectors behind the dash where the indicator bulbs and switch are connected that can be used for this.

Assuming all is well, you should now have working indicators and hazard lights. The indicator supply is normally connected to the top fuse in the fuse box, this is only powered while the ignition is turned on. So you may wish to find the indicator wire and connect it to the bottom fuse so the hazards work while the ignition is turned off.

TEST THAT THE INDICATORS/HAZARDS WORK CORRECTLY BEFORE YOU DRIVE ANYWHERE! It may also a good idea to test them after the first few drives, I first fitted my hazard switch so that the terminals were wedged against the demister pipe, which caused the hazard lights to work intermittently.


From Nina on 25 Feb 2014 at 21:31 UTC
How do i know what Relay I should get, looking at universal ones on sale in the UK, there are 2, 3 and 4 pin versions? Sorry maybe I am a bit too novice to be having a go! But given how often we break down a set of Hazards would be great to have.

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