rewiring ta23 with h4 globes

[Cob604]

hey.

just upgraging to h4 globes with 4 low and 4 high.
the lights are ground switched, so i cant replace the normal headlight relay to two 5 pins relays.

ive found a wiring diagram on toymods, but it uses the plug off the old light to switch the relay. so it it requires to run new wires from the relay to the lights. is it possible to switch it another way?

also what are the 3 green wires for that go into the headlight relay as all my lights work fine when i disconect them?

i just realised that all the lights have constant power but the indicator switch determines which light is on and grounds it accordingly, therfore it goes:

power- relay- light- switch- earth.

i take it the headlight relay switches on, when high or low beam are on.
therefore stopping the power to the lights until switched.

cheers

[td42gq]

I have a ra28 and it doesn't use a relay for the headlights, I'm guessing that yours is the same as mine as yours would be older. The way the 28 works is it just uses the multifunction switch to switch the headlights, no relays required. I think the relay you are refering to with the 3 wires is the flasher can, when disconnected the indicators won't work??

As for the headlights the easiest way to do it is to remove the wires from the headlights and put the relays in the engine bay to switch when the signal from inside the car is sent. Then use the outputs of the relay to switch the headlights and high beam on (2 relays required). If you want to make it neater than you will have to run the wires from inside the car somewhere.

The relay if you are unsure will be pin30 to ground pin87 to headlight, pin 85 for signal in and power to pin86.

In answer to your question removal of the headlight plug to wire it to a relay unfortunately will be required no matter how you do it, unless of course you cut the wiring somewhere between inside and the headlight plug.

Just a little thing for you to note in QLD you can only have one set of low beams so you might want to check if you can have 2 sets in NSW. As for High beam you can have 2 sets if you want to. No transport law against that in QLD (that I'm aware of anyway).

I hope that helps
Aaron

[oldcorollas]

you would be better having the two outer as Hi/Lo, and the two inner as just Hi..

having 4 lights on for low beam will be illegal cos then you have double the light power you are supposed to.....

if it was me, i'd wire it with 3 relays (since each light will pull around 5 amps)

fused battery power to each relay, then
1 relay to both low beams
1 relay to each pair of hi beams (ie, 2 relays)

you could bridge the power to the relays coil from those power wires as well, since they are permanent power.

then, connect the other side of the relays coil to the old wire that goes to the switch for the respective lights.
you could out in diodes for the 2 high beam relay switching things, but maybe not needed..

[Cob604]

hey. what size wiring do you think will be needed.
i read 12 guage for power to relays,
18 guage for the earths,
14 or 16 guage to each light from relay.

thinking ill split the 12v wire going into the headlight relay to power the 2 relays i have as to switch the relay.
into 2 40amp 5 pin relays, then ground other side of switch.
run new 12v from battery fused to relays (x2)
then from 87 pin run it to one side of the car and split to the 2 lights (eg 2 low beam- or 2 high beam depending on according relay)
then run 87a pin to the other side of the car.
then ground the other pin from the globe.

How do I incorporate the switching from the indicator stalk?

I am considering cutting the wires from the headlight relay, pulling all headlight wiring out of the car, laying them out and wiring the wires from that as it will have the lengths. Is there an easier way?

Thanks.

so id have a relay for low beam and a relay for high beam.

[Hack]

The Witzl has this covered

http://www.toymods.org.au/forums/sho...ht=sealed+beam

Hack

[river]

Hi,

having 4 lights on for low beam will be illegal cos then you have double the light power you are supposed to.......

I thought that also until Pretty Boy did his Crown with 4 low beam lights. When it was going for rego there was nothing in the rules saying that 4 low beams were illegal.

If you are going to massively upgrade your old Celica lights, you should invest in getting them rewired with thicker gauge wire to handle the extra ampage. And, if it was me, I'd also be getting relays fitted and upgrade the alternator.

seeyuzz
river