Thread: FITTING DRIVING LIGHTS

What's not working?

Assuming 4 pin relay, wire:

Pin 30 to +ve battery via a fuse.
Pin 87 to the lights, and the other side of the lights to earth (or back to the battery -ve if you're worried about finding a good ground).
Pin 85 of the relay to earth (Easiest to do this via the mouting screw if the relay is on a metal wing or similar)
Pin 86 to the high beam feed on the lights or fusebox, via a dash switch if you don't want them on with high beam all the time.

What have you done different?

Right on a relay you have two seperate sections - the activation terminals and the switching terminals - blown if I can remember the numbers - but


Signal from high beam goes to coil (activation) terminal - the opposite goes to earth.

Live from the battery goes (via fuse) to the dead side of the switch terminals - and then from the live side of the switch terminals run to the driving lamps - then from the lamps to earth

I'll do a basic sketch and post it

very basic sketch

On a landcruiser you have to earth the relay through the headlight circuit rather than just to ground.

Has something to do with the grounding in the engine bay.

So basically say on an 80 series.....

85 to high beam positive feed
86 to headlight negative feed
87 to positive feed + Fuse + Relay(to protect switch contacts) + Switch
30 to Driving lights positive

Driving light negative goes to battery not to body.

Other cars such as Mitsubishi Tritons and Pajero's are the same.

This works Ive just recently done a set on an 80 series.

If you mount it all at the battery tray on the left side it is all easilly accessable to the left headlight wiring and you only have to run a wire feed to the switch.

Aah,Toyotas, don't they mostly switch earth on their lamps?? I had this problem when wiring driving lamps to a toyota coaster bus once. Toyotas idea was to reduce the contact wear in the switches by switching the earth side. This means that they are effectively wired in reverse to the LR. The switch etc has constant supply, and earth is the switching side.


Confusing isn't it, but when you see it / actually wire it it makes sense. I think.

JC

McRover has it!!!

thanks for the info, I had forgotten the wiring sequence, I'll actually write it down this time!!

JC

Originally Posted by justinc

Aah,Toyotas, don't they mostly switch earth on their lamps?? I had this problem when wiring driving lamps to a toyota coaster bus once. Toyotas idea was to reduce the contact wear in the switches by switching the earth side. This means that they are effectively wired in reverse to the LR. The switch etc has constant supply, and earth is the switching side.


Confusing isn't it, but when you see it / actually wire it it makes sense. I think.

JC

There you go, thats the reason, if you wire it how I posted you wont have a problem.

Originally Posted by justinc

Aah,Toyotas, don't they mostly switch earth on their lamps?? I had this problem when wiring driving lamps to a toyota coaster bus once. Toyotas idea was to reduce the contact wear in the switches by switching the earth side. This means that they are effectively wired in reverse to the LR. The switch etc has constant supply, and earth is the switching side.


Confusing isn't it, but when you see it / actually wire it it makes sense. I think.

JC

If that is the case then the attached would apply - well done Justin