The V8 Owners Forum -

From my prevous post below i have now worked out what i think each unknown wire i have actually does, but i would be greatfull if i could have second opinions before i wire them up !

Its on a 3.9 hotwire system but has had a new complete engine loom made.

i used these http://www.mediafire.com/?byznzniibq0 and http://www.v-8.org.uk/images/forumimages/hotwire3.jpg

to work out ....

Wire 39 on ecu plug goes to ... The -ve on the coil, via a resistor.. ( what kind i dont know ) !

Wire 19 on ecu plug goes to ... The 86 terminal on the fuel pump relay and Ignition swithched live ??

Wire 34 on ecu plug goes to ... a 510 ohm resistor and then to earth... as its a manual

Wire 6 on ecu plug should go to a road speed sensor, but as i dont have one should it go to switched live ???

Wire 15 on ecu plug goes to terminals 30 and 86 on Main relay and 30 on fuel pump relay and also a constant battery live ????

Ive spent hours trying to work this out, and im really worried i might kill something if ive got it wrong, also i have no idea on what resistor is needed.

Any help be gratefull

Thanks Slatter

Slatter wrote:From my prevous post below i have now worked out what i think each unknown wire i have actually does, but i would be greatfull if i could have second opinions before i wire them up !

Its on a 3.9 hotwire system but has had a new complete engine loom made.

i used these http://www.mediafire.com/?byznzniibq0 and http://www.v-8.org.uk/images/forumimages/hotwire3.jpg

to work out ....

Wire 39 on ecu plug goes to ... The -ve on the coil, via a resistor.. ( what kind i dont know ) !

Wire 19 on ecu plug goes to ... The 86 terminal on the fuel pump relay and Ignition swithched live ??

Wire 34 on ecu plug goes to ... a 510 ohm resistor and then to earth... as its a manual

Wire 6 on ecu plug should go to a road speed sensor, but as i dont have one should it go to switched live ???

Wire 16 on ecu plug goes to terminals 30 and 86 on Main relay and 30 on fuel pump relay and also a constant battery live ????

Ive spent hours trying to work this out, and im really worried i might kill something if ive got it wrong, also i have no idea on what resistor is needed.

Any help be gratefull

Thanks Slatter

Wire 6 from the speed sensor just leave disconnected as this has been discussed may times and does not seem to affect running.

Wire 16 is the ground from the fuel pump relay which switches the relay and is not connected to a live feed.

As to the resister it is a 510ohm one but if you are unsure just put a switch in the line to earth to make it think a auto switch is fitted thats what I fitted.

The rest seem all ok.

cheers George

Thanks but i just noticed i put 16 down and it should be 15 lol ,

Thanks for the above advice though.

slatter

On my 3.5EFi, I haven't fitted a resistor in the wire to the coil. Not given me any issues yet.

Chris.