Facelift Ignition wiring

[SimonB]

I'm fitting my turbo timer, so I took my dash apart to have a look at the ignition wiring today. I've got a facelift car, which naturally has a completely different plug and wiring for the ignition switch than the older cars, so I'm going to have to wire it in without the aid of a loom. Anyway, after poking around with a multimeter for ages this is what I think the wires are:

 

*White - +12v no 1

*Green - ACC

*Black+Yellow - IG1

*Black + Red - starter

White + Red - +12v no.2

Black + White - IG2

 

The ones with a * are heavier gauge wire than the others.

 

Does anyone know if this is correct ? I'm not too sure about the starter wire, because I would have expected it to be connected to the +12V when you turn the key to start but it didn't seem to be. My alarm seems to be teed into this wire though, and it's heavier gauge, so it must be the starter right ?

 

Don't want to get it wrong and find the timer trying to fire the starter motor instead of keeping the engine running...

[MONKEYmark]

i thought it was weird too

i bought a blitz turbo timer and wiring harnes and thought i would install mine and its a different plug

 

i rang racelogic up and told them and they said they only sell 1 wiring harness

 

its about as much use as a chocolate fireguard

 

 

still sat here with a turbo timer not installed

 

it has 0-60 and 0-100 and other bits on too

 

 

let us know how you get on

[Digsy]

Not that I have a facelift car, or claim to know much about them or anything, but this excerpt from the pre-facelift wiring diagram might be helpful, as some of the wiring colours seem to be the same as you describe...

[SimonB]

Right, done it. The colours I posted earlier are correct. I saw the wiring diagram on MKIV.com, so I knew how it was wired up, but not which colour was what. Anyway, here's the differences:

function           pre-facelift colour               facelift colour
----------------------------------------------------------------------
+12V               White                             White
+12V no. 2         White+Red                         White+Red
ACC                Pink+Blue                         Green
IGN1               Black + Yellow                    Black +Yellow
IGN2               Black + Orange                    Black + White
STARTER            Black + White                     Black + Red

So, the timer should be wired to white (+12v), black + yellow (IGN1) and black + white (IGN2). It has to be wired to IGN1 and IGN2 (not ACC) otherwise it will run the engine on but not the radiator fan, which could be bad

 

Just cut a bit of insulation off each cable with a knife, tin it and then wrap the timer wire round and solder it on. I chopped the plug off the timer wire and soldered some extension wires on because I mounted the timer under the stereo in one of those Halfords cubby-hole things.

 

Mine is the one with a boost gauge built in. Still haven't quite plumbed the tube in yet though.

 

I'll post some pics later...

[SimonB]

Hmmmm... Looks like Toyota might have done a sneaky one and moved the heater/fan/radiator fan etc to the ACC circuit rather than the IGN2 which is shown on the MKIV.com website. Tested the timer out this evening and it didn't keep the heater running. Don't know about the radiator fan though because the engine wasn't hot enough for it to be running. I'll have to test it out properly to make sure.

 

Here's a piccy though...

 

http://www.simons-house.freeserve.co.uk/TT.jpg

 

[SimonB]

Just in case anyone is interested, I tested it out and the radiator fan does work OK with this wiring, so if anyone else wants to wire one in, these are the wires to use...