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GTI 8v digi wiring

Posted: 24 Oct 2012, 19:54
by Lagger
Hey everyone, just thought i'd say hello as this is my first post and im looking for some help with the digifant wiring on the 8v pb gti transplant that i'll be starting this weekend. I have all the diesel parts needed plus the engine,complete harness and ecu, I'll be able to bolt everything in as im not shy in throwing spanners about however im a little lacking in the electrics dept and even though this wiring is supposed to be as easy as it gets due to the engine harness being stand alone i need to find out what i need to connect up to get the ecu live to be able to start the engine, thanks in advance for any help with this.

Re: GTI 8v digi wiring

Posted: 26 Oct 2012, 17:57
by ELVIS
Where abouts are you?

If you're in sw can maybe give a few pointers.

It's been a while but from memory it is 3 or 4 wires from loom to t3.

Green red goes to starter for cranking signal

Rest is easy, ecu live and fuel pump are wired thr two basic relays.

Pretty sure fuel pump is switched earth which is possibly red yellow? :ok

Re: GTI 8v digi wiring

Posted: 26 Oct 2012, 20:52
by Lagger
Cheers Elvis that's a big help, what you say about 3/4 wires being all thats needed rings true with what people tell me but hey just didn't know what wires went where so thanks for the info mate,

Re: GTI 8v digi wiring

Posted: 28 Oct 2012, 01:01
by ELVIS
Get youself a mk2 haynes , wiring digrams are in there.

from what i can remember, when you end up with *just* the ecu loom there is one obvious connector that doesnt go anywhere - ie it wont have plug on the end going to the sensors/senders.

99% sure it is a 4 or 5 way multiplug with one of the terminals/wires blanked/missing.

This is just bad memory guesswrk but onw will be red/yellow , one is red/green and possibly a third is black/white.

Re: GTI 8v digi wiring

Posted: 28 Oct 2012, 01:12
by ELVIS
Its the photo and text on this page

http://www.clubgti.com/showthread.php?1 ... -of-an-era" onclick="window.open(this.href);return false;!

Its post number 11 you want and the pic near the bottom of the post just above the schematic for the megasquirt pinout.

Its the pic that goes with this text

"On the 5 pin connector
T5/1 Red/White Heated Oxygen sensor + 12v supply ( not used in UK)
T5/2 Red/Yellow Fuel Pump Relay signal to ECU
T5/3 Red/Green Starter cranking signal ( this was removed for MS)
T5/4 Black/Yellow +12v from digifant relay
T5/5 Red/Black Fuel pump and Injector +12v supply."

When i say 'only' wiring , will have to sort out earth for ecu, and wiring for coil IIRC :ok

Re: GTI 8v digi wiring

Posted: 28 Oct 2012, 15:37
by Lagger
Elvis you're a ledgend mate i can get everything i need from what you've sent me in those last 2 replys mate, i did get a haynes manual but couldn't make head nor tale of it but thanks again for the info.