Spot lights

Submitted: Tuesday, Jun 28, 2005 at 18:20
ThreadID: 24263 Views:1848 Replies:6 FollowUps:0
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Hi all,
Was wondering if someone can fill me in on the best way to install a set of spot lights on a toyota that is switching to ground for the headlights. Was rewiring for a friend that had someone botch the job up. I have some on my truck and they have been fitted professionally, it picks up 2 cores behind the headlight and it has a diode on the relay.

Any help appreciated

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Reply By: Member - DOZER- Tuesday, Jun 28, 2005 at 18:34

Tuesday, Jun 28, 2005 at 18:34
Mate, a curlie one..but do-able
Attatch wire to low beam negitive wire...use this wire to supply power to the relay control,(85) earth the other side of the coil (86)....whats this you say???
Imagine, power is now running the high beam, and positive makes its way accross the low fillament to that wire you installed, and controls the relay, allowing spotties on high beam only.
When low is on, relay gets two earths and doesnt pick up.
b4 you bag me out, walk a mile in my shoes, then your a mile away and have my shoes :)

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AnswerID: 117940

Reply By: Boxheadc - Tuesday, Jun 28, 2005 at 19:33

Tuesday, Jun 28, 2005 at 19:33
Thank-you mate, appreciate it.


AnswerID: 117950

Reply By: Member - Matt Mu (Perth-WA) - Tuesday, Jun 28, 2005 at 20:46

Tuesday, Jun 28, 2005 at 20:46
If was already wired up in the conventional way ie wire pulled off the high beam at the lights for the 85 then instead of grounding the 86 wire, you supply ign power there. That way you effectively have power on both sides of the relay until the high beam comes on (path to ground) and now you hhave a potential difference ocross the relay and it energises.

Easy way to wire up if someone has done most off the work and cant work out why the lights are on all the time!!


AnswerID: 117962

Reply By: Stew53 - Tuesday, Jun 28, 2005 at 21:22

Tuesday, Jun 28, 2005 at 21:22
Toyota supply power to the headlight bulbs and earth out either the high beam or low beam through the column mounted switch. To activate a relay for driving lights obtain power from the power wire at the rear of the light ( to determine which wire this is, using a multi meter find out which wire has power on it when high and or low beam is switched on) take the wire to the dash and run it through a switch ( to turn the driving lights on and off) then return the wire to the 85 terminal on your relay. From the 86 terminal on your relay run a wire to the high beam earth wire at the rear of the headlight ( to identify the correct one of the remaining two wires, it is the wire which has volts on it only when high beam is on, its actually earthing out the light through the column mounted switch). Use 6mm wire from the battery to a 30 amp fuse then to the 30 terminal on your relay and use 4mm wire from the 87 terminal to your lights and earth to obtain max volts at your driving lights.
Hope this helps
AnswerID: 117968

Reply By: drivesafe - Wednesday, Jun 29, 2005 at 10:43

Wednesday, Jun 29, 2005 at 10:43
Hi Boxheadc this might help you

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AnswerID: 118024

Reply By: drivesafe - Wednesday, Jun 29, 2005 at 21:23

Wednesday, Jun 29, 2005 at 21:23
If you are still not sure about the polarity of the headlights on any vehicle, there is a safe and simple way around the problem.

Simply workout which wire at the back of one of the headlights is a constant voltage ( the voltage, either positive or negative, does not change ) when the headlights are turned on and off on both low and high beam and connect this wire to terminal 85 on the driving light relay.

Next, workout which wire changes to the opposite polarity of the above wire, only when the high beam is turned on and connect this wire to terminal 86 on the driving light relay.

You won’t need to get the polarity correct as it will be the same as is needed to turn the high beam on and off plus the relay will be protected by the high beam’s fuse.

AnswerID: 118135

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