'78 BJ40 lighting wiring

[bj40green]

Yeah it starts and glows fine. The lights work too but is wired very bad.

But then remains the main question... Why the hell are the glow relay, and fuel control relay connected to the light switch?????

I still don't get it. Help me out on this:

It glows and starts so that part of the wiring is OK. Right?
For this to function you need all the wire colors you described at the light switch.

The lights work too.. But for one or some reason the wires from the light switch are the wrong colors (IGN KEY colors) and go to all the IGN KEY functions.

How the heck can your headlights work? What am I missing?

Rudi

 

[NielsC]

I'm sorry I wasn't clear on this:

The white /blue is the power supply 24volt.

Black/yellow is the output of the switch.
It goes to the fusebox ,and from the fuse to the dimmer switch.
From there on it goes to either high beam or low beam.
The rear lights are simply connected to the low and high beam wiring.

But it then left me with the other question, why are the 3 other wires for.

The white/green from glow relais/G terminal at ign switch,
blue/red wich comes from fusebox but isn't connected as there is nothing at the other side of the fuse,
and black/white wich goes to EDIC relay, but my 40 is not equiped with edic anymore.

I think those wire aren't used in the switch, what the hell could they even be used for in a LIGHTSWITCH ?
So I think PO used an old plug and piece of wiring harness wich is the same type as the light switch . Very strange tough...

The wiring of the ignition switch is all there and proper colours so it glows and starts and does everything.

Hope this clears up everything.

 

[bj40green]

I'm sorry I wasn't clear on this:

The white /blue is the power supply 24volt.

Black/yellow is the output of the switch.
It goes to the fusebox ,and from the fuse to the dimmer switch.
From there on it goes to either high beam or low beam.
The rear lights are simply connected to the low and high beam wiring.

But it then left me with the other question, why are the 3 other wires for.

The white/green from glow relais/G terminal at ign switch,
blue/red wich comes from fusebox but isn't connected as there is nothing at the other side of the fuse,
and black/white wich goes to EDIC relay, but my 40 is not equiped with edic anymore.

I think those wire aren't used in the switch, what the hell could they even be used for in a LIGHTSWITCH ?
So I think PO used an old plug and piece of wiring harness wich is the same type as the light switch . Very strange tough...

The wiring of the ignition switch is all there and proper colours so it glows and starts and does everything.

Hope this clears up everything.

Now I get the picture. Your light switch works, but not as it should work.
Off - running lights - head lights.
It's works now as an on/off switch.
One day there was a problem and the PO fabricated (with a piece of harness) a solution. Probably couldn't figure out the tail lights and hooked them up until it worked. That also explains the loose wires.

So you're up for a rewire job. Keep in mind that it is possible that the headlight switch is defective and the PO had no clue about it.

Wish you luck,

Rudi

 

[NielsC]

Actually it switches low beam and rear lights in both No1 and No2 position.
I'm going to rewire it completly as it should and use relays for it and descent fuses.

Thanks !

 

[cuencanolenny]

Now I get the picture. Your light switch works, but not as it should work.
Off - running lights - head lights.
It's works now as an on/off switch.
One day there was a problem and the PO fabricated (with a piece of harness) a solution. Probably couldn't figure out the tail lights and hooked them up until it worked. That also explains the loose wires.

So you're up for a rewire job. Keep in mind that it is possible that the headlight switch is defective and the PO had no clue about it.

Wish you luck,

Rudi

Rudi, new question on the hazard switch wiring.
Per the 2nd page of the wiring diagram (4-147) the Hazard Switch gets fused power from two sources. The Grn/Red at "Tail" and Grn/White at "Stop/Horn."
The Stop Light switch gets fused power via the Grn/White wire.
The Direction Switch gets power from, presumably, the Grn/Lt Blue wire from the Hazard Switch.
The Flasher gets power from the Grn/Lt Blue from either the Hazard or Direction Switches.

So when no turn signal or hazard switch is "on" the Brake Switch gets power from the Hazard Switch.

When Hazard or Direction Switches are on the Flasher interrupts the signal to the turn signal lights making them flash.

Am I understanding this correctly so far? I always think of electricity like plumbing, controlling how the water flows. Not very technical.

So my "new" wiring harness (I am switching from the '70 Cruiser to the '79 Cruiser) never had a hazard switch to deal with, but now I do. My fuse panel incorporates an integrated Hazard/Turn Flasher. Where the flasher plugs into the panel there are of course two female spade terminals. One has two brown wires. One brown wire feeds from the power bus bar to the "Turn Relay", to the Flasher. The wire then goes from the Flasher to the "Hazard" screw connection. The second terminal has orange wires. The first wire runs from the power bus bar to the "Flasher" Fuse and then to the Flasher. From the Flasher then to the "Turn Switch" screw connection.

Does this mean the Hazard is Fused via the Flasher?

I'm thinking I could unplug the Flasher, exposing the two female spade connections, run a wire from the "Brown/Turn Relay" connection to the Hazard Switch at Grn/Red. This connection would be two wires, the second wire returns to the "Brown" Flasher. I would then run a short wire from the Orange female terminal on the Fuse panel to the "Orange" Flasher. It seems this would give me power to the Hazard Switch first, as does the Toyota wiring diagram. Or am I all wet because I have water running everywhere?