Ke70 Relay/fusible Link Help

[ATOYOTA]

I'm rewiring a large chunk of the loom and consolidating all the fuse/relay panels into this:

http://www.cooperind...elaymodule.html

 

But I'm at a bit of a loss as to what's going on with the relays.

 

So there's 4 relays in a KE70. The 2 in the engine bay I know are main/headlights but I'm not entirely sure what the kick panel ones are for. Maybe one is tail lights and the other is heater? I'm not sure.

 

The other question I have is about 3 pin relays. The headlight and both kick panel relays are 3 pin but I don't understand how that works. I thought 4 would be the minimum because you need a power source and switch to run on their own separate circuits.

 

Also my fusible links blew so I've decided to go blade type but I don't know what amperage they were rated for and which ones are which. There were 2 greens and 1 yellow from memory?

 

Here's a couple of pics for reference. Thanks guys!

[rian]

This is the diagram for 3 pin relays:

 

 

1 is power in, the switch and whatever you want to turn on with the relay share the same power supply.

2 goes to your switch, then from the switch to earth.

3 goes to whatever you want to turn on with the relay.

 

As for the fusible links, I'm pretty sure only the greens wires are fusible (AM1 and AM2 is what the links are called), the yellow wire is for your headlights/hazards/brake lights/dome light/anything that works without the key in the ignition and all of these things have their own fuse I think.

The greens fusible links are probably around 60-100amps.

 

And here is a wiring diagram that should have some handy info in it:

 

KE70_Chassis_Electrical_System.pdf

Edited January 8, 2014 by rian

[ATOYOTA]

Ok so the fusible links are rated quite high. I've just got 30A fuses running through all 3 and I thought that was overkill until now. Figured there's nothing in there over 20A so it shouldn't give me much trouble. I'll probably whack some circuit breakers in there anyway.

 

Would it be worth rewiring to 4 pin or do 3 pin relays do the trick?

[B.L.Z.BUB]

If you are upgrading the main switchable power wires then changing to a 4 pin might be a good idea. I replaced nearly everything with 4 pins as the wire gauges for everything was upgraded.

 

As for the kick panel relays I'm pretty sure one is the heater and one is the main engine relay (EDIT: The main should be in the engine box actually, might be heater and rear demister?). The two in the engine bay are headlights and starter motor.

 

I also changed my fusible links to actual fuses. I used the inline old school glass fuses. Mainly because fusible links can burn out but still look OK.

Edited January 8, 2014 by B.L.Z.BUB

[rian]

Actually, I might be wrong about the size of those AM1 and AM2 fuses. They could be 30-40amp.

[B.L.Z.BUB]

Isnt there a couple of 30A and an 80A?