Not sure what you do if yours is a manual, auto's have a reverse switch on the column. Holden manuals have the full wiring diagrams including accessories like reverse lights-I've got one i can scan if you need it
Jimmy
'The best engine in the world is a vagina. It can be started with only one finger. It is self-lubricating. It takes any size piston. And it changes it's own oil every four weeks. It is a pity that the management system is so f*$king temperamental.'
Hi Adrian,
your wiring loom may already have the light green leads needed.
These are positive leads and the supply to them is switched through a large actuating lever fitted to the steering column in the engine bay.
Supply is from the ignition switch in the "on" position.
I believe I used connectors from an EK rear indicator loom - these will fit the back of the back-up lamps.
If you don't want original, I would suggest you fit a relay to control power.
Depending on what box you have - if it is not original, find out how the original switching method operated and have this control the operation of the relay.
If it is earth "switched" - your supply can serve both serve as the power source for the lamps and relay. Earth will then close the relay and supply power to the lamps.
If it is positive switched, earth the relay and fit it between supply and the gearbox switch - supply to the lamps remains the same.
I'd fit a fuse in the supply to the box.
For both, I'd also suggest to fit a fuse early in the line from the relay back to the lamps......
Hi again Adrian,
I've just had a peek through my Toyota factory manuals....
I have 5 speed gearboxes in both my FJ and the little Corona - they are both W-50 transmissions.
You could have one of three Toyota 5 speeds - T-50, W-50 or P-51.
From what I can see, they all appear to use the same mode of switching - that is, positive in, positive out.....
The gearbox makes the connection internally when reverse is selected.
.
The Aus 4 speed switch is the same except that the Aus box switching is done externally by the shift mechanism reverse lever- I replaced that with a micro switch which then "earth switches" a relay.
If it were a case of using ground, there would most likely only be one lead....
You may, however - decide to use the switch for grounding purposes - this way you will only need one lead going to the box......
It also provides a bit of electrical protection should something come adrift.... earth will not short - going to earth.....
If you connect one side of the switch to a good earth point, the other lead becomes your relay earth as in my post above... pin 85.
Supply a **fused power lead from your ignition switch to the relay - pin 86
- this way, the relay will close when it receives the earth from your gearbox switch.
Connect the same positive lead to the 30 terminal - or make a link.
This is the supply for your reverse lights - input side of relay.
Pin 87 then becomes your connection to the reverse lights - output.
**I would also put an in line fuse on this lead - close to the relay.
Thanks Rosco, and No, it isn't wiring to ignition. YET .....
But I will change it.
I am aware of the potential risks, but I only ever put the car in First, and my son always leaves manuals in neutral.
It actually has the standard "back up lights" fuse, so if that runs off ignition, I'll use it.
It had the old Cigarette paper modification, so I replaced it with a working fuse.
IT's LIKE WATCHING DRUNK MONKEYS TRYING TO HUMP A FOOTBALL.
Phew! - happy to learn you are using fuses in fuse holders......
It sounds as if this vehicle has been through the electrical "mill" ...
Your backup supply at the fuse block should be sourced from a lead from the ignition switch.... I cannot guarantee that this is the case.... from your information, it may not be the case.....
I am certainly not in a position to question how people operate their vehicle - but I would seriously suggest that a vehicle is not left in neutral and rely on the handbrake alone..... relatively safe if wheels are against some obstruction or if on level ground......
If on an incline - the handbrake assembly relies on a number of small critical components - any one of them failing will result in a run away.... perhaps into the "roller" parked down the hill a bit.....
We have witnessed members of this forum who's vehicles have rolled down the driveway and across the road..... pretty unsavoury if damage results...... but to hit a child - I suppose I've over-emphasised this, Finny.....?