wiring basics!!

[Pube]

Looks like im back to basics to solve my charge light issues for my 1ggte rt142. I think I have come unstuck when I have trimmed the engine bay wiring, in particular, the large gauge white wire that travells around the engine bay, to the alternator and battery.

Im after a very basic drawing of where this wire runs and connects to. I think I have come unstuck around the fuse box area where the wire splices into 2 wires and joins itself if that makes any sense. So im after a connect the dot to dot help here as im useless when it comes to wiring.

Large gauge white wire connects to:

1. Battery
2. Fues box
3. Alternator
4. Runs to drivers side engine bay
5. Runs to passenger side engine bay.

So what connects to what?

If this isnt any good I think ill just go to pic and payless and cut a whole engine bay wiring out of a corona!

[worldwalker]

best thing you could do if unsure is spend a day in a wreckers with your multimeter, I forgot mine last time I went and wasted near 3 hours hunting wires down for my new aircon. I missed 3, had to get them a week later.

[oldcorollas]

Large gauge white wire connects to:

1. Battery
2. Fues box
3. Alternator
4. Runs to drivers side engine bay
5. Runs to passenger side engine bay.

So what connects to what?

umm... that large white wire would be the wire used for the alternator to charge the battery...
so.. number 1, it should connect between alternator and battery (thru fuse if you have one for the alt?)

it may also be used as the power wire to supply the fuse box power, since it's a big wire (but this can be seperate to the alternator wire, adn i prefer to keep alternator wire dedicated)

as for going to sides of engine bay... what does it do? permanent power for the headlight relays??

[thechuckster]

alt ->battery ->fusebox ->runs to interior relay/fuse panel.

white distributes battery (e.g. unswitched) power to eveything except starter power (but does supply power to any starter switch or startr relay).

In older cars, this circuit is usually unfused tho sometimes connected to the battery via fusable link), in more modern vehiclesm, it goes via the largest fuse in the engine bay fusebox.

[Negative Boost]

In my car that wire gauge runs:

Alt >> Fuse box (where it splices into 2 different wires) >> then to the battery and interior via different wires of course.

[eire_kp61]

Im doing a 4age swap into a kp61 and noticed a similar large white wire,

I think it went to a seperate small fuse box inside the footwell for air con

[The Witzl]

Pube.... like i said i have an RT142 body manual, this includes wiring diagrams.


Come and get it.

[o_man_ra23]

That white wire connects all the mentioned items, as already described. Went through that when I installed a 22RE into my mate's RA60.

I would suggest adding some fuses around the place. If you have an 80 amp alternator, put a 100 amp fuse/circuit breaker right next to the alternator. the other places mentioned should be fused already.

Cheers, Owen

[Pube]

its all good now, problem solved!