[DMAC]

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

Schematic.


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.

[want33s]

And for those who don't read wiring diagrams so well, try this:

Quote:

On the rear of the driver's side headlight locate the red wire with silver bands around it,

if you have a 12V electrical tester check that this wire is positive when the headlights are on and it then peculiarly goes

to negative when highbeam is on.

Solder onto this wire with a piece of wire long enough to reach back to where you are going to

locate the relay, and attach this wire to terminal number 85.

This will be the "trigger" for the relay, the relay will always have a positive feed to the normal trigger,

and live going to the "switch" of the relay for the auxiliary spots,

so the relay will click closed only when the earth terminal gets a negative feed

(as it will normally be positive...).


Take a wire off the battery's live terminal and with an inline fuse holder connect it to terminals 86 and 87,

these are the normal trigger and the input terminal of the relays switch.

Connect a wire from terminal 30 - the switched output of the relay - and connect this to the positive wire of your spotlights,

the spotlights should also be earthed to either the vehicles body or chassis, or an existing earth point

(probably the best idea I've found).

Hmm, and that's it... when you put your headlights on the wire coming from the soldered joint attached to the red wire

with silver bands will be positive, so the relay will not click closed.

However when you "flash" your headlights or switch to highbeam,

that red wire with the silver bands will drop from positive to negative, then, as the relay now has an earth it

will click closed and switch the positive feed to the spotlights on...

and your spots will come on so you can flash other roadusers, or when you're offroad in the dark, etc...

[atari4x4]

:goodtech:

[JrZook]

want33s wrote:

Scotchblock

[want33s]

JrZook wrote:

want33s wrote:

Scotchblock

I just copied and pasted that blurb from a UK suzi site...
Scotchlocks be gone...

[Dr_Snapid]

This should apply not only to sierras but Jimnys as well, no? Perhaps a thread rename to reflect more than just sierras?