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How to Wire spotlights

DMAC wrote:

Thought this might help anyone wiring up spotties on a sierra so they only come on if high beam is on.

Schematic. Thanks to 89_tintop

The back of the headlight connector.

Strip the wires going to "GROUND" and "DRIVE"

Join wires. "DRIVE" to the relay and "GROUND" to the in cab switch.

You have to it this way as you can't run a positive from the highbeam and have the otherisde of the relay connected to the chasis (earth) as Sierria's runs 12 volts to all 3 terminals on the back of the connector.
The rest of the wiring is straight forward.

Hope this helps someone.

JrZook wrote:

Ok we will use the highbeam trigger on this to keep it legal. Suzuki head lights are ground switching. This means all the terminals at the back of the headlights will be at 12V when they are off. For instance when the high beams are turned on the GREEN wire from royces diagram of the headlight plug goes to ground.

So to wire up your spotties:

1. split the right wire going to your headlight ( looking at the back of the plug, just use the drivers side headlight if easiest).

2. From this junction take a wire to '86' of the relay.

3. Directly opposite '86' is is '85', connect this to 1 termainal of a switch.

4. Take a wire from the other terminal of the switch to '30' of relay

5. Also from '30' connect this to a 40amp fuse then to 12V, the positive terminal of the battery.

6. Now connect '87' to the positive wire of your spotlights.

7. Connect the other wire of the spotties to ground, or chassie.

So the spotlights should turn on when the highbeams are on and the switch is turned on.

Cheers Dan

Posted by royce on Thursday, December 10, 2009 (14:05:41) (979 reads) [ Administration ]