LUX666 wrote:Mate,
The Hilux is not exactly negative switching, it is all normal as per previous vehicles, the negative switching that everyone talks about is actually when you tap into the lights to pick up the High beam wire, this is where is all becomes confusing, had me stuffed for a few days, Toyota, and many others, use a polarity changing system, where a wire which is positive on high beam actually reverts back to negative on low beam and neutral when off. There is a great diagram on this site that points out which wire to hook into.
Everything else in the vehicle, I'm referring to added accessories here, wires the same as always, do not switch the negative it can be a very dangerous practice.
Hope this helps clarify
Cheers
John
aandy wrote:Interesting.. I just went and had another look,
Into the headlight plug there are 3 wires
white with black stripe
black with white stripe
red/yellow
All three wires are 0V to earth with headlights off, ignition in all positions.
with headlight on there is 12V between the black/white stripe and earth
with high beam on there is 12V between red/yellow and earth
there is always 0V and continuity between white/black stripe and earth (i.e. it is the earth)
This sure looks like positive switching, at least by the time it makes it to the headlight plug.
Although electrically savvy, I am not an auto electrician, I work in the world of insulated neutral 3 phase on ships.
this may be a terminology thing
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