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Auxiliary Lights

g4lights

Adding lights to your Land Rover is really a simple exercise. Below is a wiring diagram and simple instructions to help you complete the task. I mounted the lights on the cross rails of the roof rack. They could also be mounted on the brush guard, or bumper using Land Rover part number VUB500470.
installed switch pannel

The switch can be mounted in dash surround or as I did, removing the ash tray and replacing it with a switch panel from a Discovery I.
Disco 1 switch fog light switch

SWITCH:
Land Rover Part # AMR4138 , Fog light switch for series I Discovery.

Pin #1 Three basic options: Use 14 gage wire and 10 amp fuse to protect the switch circuit.
A- Fused 12 volt from cigarette lighter. This will allow the lights to work independent of other lights
B- Fused connection to the high beam circuit . This will allow the lights to work only when the high beams are active. In some state only legal hook up for high mounted driving lights.
C- For fog lights, that only work with low beams. connect to low beam circuit.

Pin #4 Connects to pin 86 on the relay.Use 14 gage wire. When pin 85 on the relay is properly grounded this completes the circuit for the magnet that activates the switch between pins 87 and 30 on the relay.

pin #2 Connect to a dimmed / switched circuit such as tapped into pin two on the cruise control switch. This allows the back light to act in conjunction with other dash lights.

pin #5 Ground for back lights circuit in switch.

pin #3 is not used.

relay for lights

Relay

#30 30 amp fused from battery use 14 gage wire.
#87 To lights, use 14 gage wire
#85 To ground, use 12 gage wire.
#86 To pin 4 on switch, use 12 gage wire.

Auxiliary Lamp Wire Diagram

12 Responses to “Auxiliary Lights”

  • Michael Neal:

    hey, found the parts number for bumper mounting brackets for land rover discovery. its an OEM part #VUB500470

  • Greg love:

    What kind of brackets did you use to mount the lights on the cross rails.

  • Jim:

    I actually used an “L” bracket and a flat brace from Ace hardware . Cut off about 3/4 inch from on side of the el bracket so it would not rub the roof.
    Jim Edson
    http://www.Greenrovers.com
    Jim@greenrovers.com

  • Gavin:

    Pardon my ignorance but could you please explain what is meant by dimmed/switched power that is attached to pin 2. Eg?

  • Jim:

    That would be any power source that is controlled by the knob that
    dims/brightens the dash lights.

  • Gavin:

    Thank you for that. Unless I have totally missed it my D1 doesn’t have a dimmer switch. Would attaching pin 2 to the wire that supplies the light to the cigar lighter have the desired effect?

  • Jim:

    Yes, attach to any dash light.

  • Primussucks:

    Hey Jim.
    I’m loving this setup. I’m going to try and get it done before Moab. Quick question. Do you have the part number for the Ashtray holder? I’m thinking 4 light switches.
    1. Lights on the ARB, 2. Center Roof, 3. Outer Roof, 4. Work Light (rear).

    Where did you mount the relays? Are you going to be at the Tech Day next weekend? I was going to try and get things wired up there (and service the Tranny and Xfer case).

    Thanks.

  • Jim:

    sent you an e-mail. the relays are mounted in the battery box by the jack.

  • Jovan:

    Hi,
    Could you tell me where did you enter the cabin with the wire harness from your aux lights?
    Thanks.

  • Jim:

    through an existing grommet on the drivers side near the fuse box.

  • Abran:

    Great article! Can the yellow relay with the same pin diagram(Siemens part# YWB10012/YWB10027) be used for this set up?

    Thank you.

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