Wires everywhere!!!
Discussion
As I may mentioned before, electricity is a mystery to me so today has been a challenge!
I have spent the day cutting into the standard GM LS7 engine loom to free up the throttle and ignition cable then adding in the power cable to the fuel pumps before reassembling.
Then sorting the engine bay section of the Ultima loom. I have fitted an SPA Dash so there is very little of the Ultima loom that is needed in the engine bay. Earth cable, aircon bits, alternator bobs, starter stuff and the rear lights and that's about it! So lots of connectors removed, cables sealed in shrink wrap then bundled up and covered in flexible trunking so it's there (labeled too) in case it's needed in the future.
I suspect I could have chopped out about 70% of the nice new Ultima loom if I had wanted to (before fitting it to the car) if I had decided what dash I was going to use before starting the rebuild.
However, it has been a fruitful day in the workshop and if my oil cooler water pipes arrive tomorrow (they were promised for Saturday but delivery companies never seem to make it out to us at the weekend!!!) the engine should go in for the final time on Tuesday.
Exhaust next.
Paul
I have spent the day cutting into the standard GM LS7 engine loom to free up the throttle and ignition cable then adding in the power cable to the fuel pumps before reassembling.
Then sorting the engine bay section of the Ultima loom. I have fitted an SPA Dash so there is very little of the Ultima loom that is needed in the engine bay. Earth cable, aircon bits, alternator bobs, starter stuff and the rear lights and that's about it! So lots of connectors removed, cables sealed in shrink wrap then bundled up and covered in flexible trunking so it's there (labeled too) in case it's needed in the future.
I suspect I could have chopped out about 70% of the nice new Ultima loom if I had wanted to (before fitting it to the car) if I had decided what dash I was going to use before starting the rebuild.
However, it has been a fruitful day in the workshop and if my oil cooler water pipes arrive tomorrow (they were promised for Saturday but delivery companies never seem to make it out to us at the weekend!!!) the engine should go in for the final time on Tuesday.
Exhaust next.
Paul
ARRRGGGGGH! What do you mean free up the ignition cable???
I thought i was electrically competent...but obviously not!
I've managed to squeeze my LS3 ECU and Fusebox into the right hand luggage compartment after cutting into the loom to extend the throttle conection....BUT i never knew (or thought) about the ignition lead.
Also is the power lead for the fuel pumps fed direct to the fusebox by any chance.
Paul, have i missed something important in the factory build manual, or did you find some info somewhere as to what cables to move or redirect around the car or were you just a bit brighter than me?
Otherwise can you or someone clarify what I also need to add or remove apart from the throttle cable for an LS3 with standard Ultima gauges.
Cheers
Pete.
I thought i was electrically competent...but obviously not!
I've managed to squeeze my LS3 ECU and Fusebox into the right hand luggage compartment after cutting into the loom to extend the throttle conection....BUT i never knew (or thought) about the ignition lead.
Also is the power lead for the fuel pumps fed direct to the fusebox by any chance.
Paul, have i missed something important in the factory build manual, or did you find some info somewhere as to what cables to move or redirect around the car or were you just a bit brighter than me?
Otherwise can you or someone clarify what I also need to add or remove apart from the throttle cable for an LS3 with standard Ultima gauges.
Cheers
Pete.
Paul - it sounds like you're a little further down the road on the same task I've been working on recently. I've recently finished tidying up the std Ultima wiring loom in the engine bay. As I've compeltely re-wrapped the whole loom with TwistWrap, where possibly I've labelled and tucked in the connections I don't need. I've only cut / heat shrinked very few connections that I really know won't be used.
This weekend I tidied up the dash wiring too. As I'll be running an LS3 with GM ECU and a Race Tech Dash2, there's a lot of wiring around the car that I don't need for the installation. Just by doing this, the remaining loose wires look a lot more manageable than they did a few weeks ago, LOL!
This weekend I tidied up the dash wiring too. As I'll be running an LS3 with GM ECU and a Race Tech Dash2, there's a lot of wiring around the car that I don't need for the installation. Just by doing this, the remaining loose wires look a lot more manageable than they did a few weeks ago, LOL!
chucknorris said:
ARRRGGGGGH! What do you mean free up the ignition cable???
I thought i was electrically competent...but obviously not!
I've managed to squeeze my LS3 ECU and Fusebox into the right hand luggage compartment after cutting into the loom to extend the throttle conection....BUT i never knew (or thought) about the ignition lead.
Also is the power lead for the fuel pumps fed direct to the fusebox by any chance.
Paul, have i missed something important in the factory build manual, or did you find some info somewhere as to what cables to move or redirect around the car or were you just a bit brighter than me?
Otherwise can you or someone clarify what I also need to add or remove apart from the throttle cable for an LS3 with standard Ultima gauges.
Cheers
Pete.
As Steve has said the GM ecu will need a substantial cable running to it to feed all the engine components. There is a grey wire from the engine fuse box that runs to the fuel pumps and a blue wire to feed the radiator fans both of which are fused by the engine fuse box.I thought i was electrically competent...but obviously not!
I've managed to squeeze my LS3 ECU and Fusebox into the right hand luggage compartment after cutting into the loom to extend the throttle conection....BUT i never knew (or thought) about the ignition lead.
Also is the power lead for the fuel pumps fed direct to the fusebox by any chance.
Paul, have i missed something important in the factory build manual, or did you find some info somewhere as to what cables to move or redirect around the car or were you just a bit brighter than me?
Otherwise can you or someone clarify what I also need to add or remove apart from the throttle cable for an LS3 with standard Ultima gauges.
Cheers
Pete.
There is a small red wire to connect to the ignition switch to fire everything up.
It is not a case of being brighter but my fuel system is different to standard and the SPA dash carries all the functions for the Ultima dials so I had to think about how to run my system. I am not following the build manual other than for wire identification.
BTW. My wire sizing range from teeny weeny to unbendable so substantial is toward the higher end of that scale.
Paul
Phew! Thanks Paul, It's not too bad after all. I had allowed for a heavy ( almost unbendable) cable anyway to give power to the fusebox and the grey and blue cables came marked, it's just the small ignition lead I'll need to add, but because the ECU is in the right hand luggage pod, it's next to the ignition switch and so should be easy enough to install and hide away.
Cheers for that
Pete
Cheers for that
Pete
Pete
I have no luggage pods so my ecu is mounted on the firewall at the back of the side pods, so not far from yours. Not sure how you will extricate the ignition switch wire or will you just route one back from the engine bay?
I need to use the power wire that will feed the engine ecu to feed the twin fans on my aircon condenser, via a relay, switched by the Ultima loom so I hope they don't create interference (I don't think they will).
Paul
I have no luggage pods so my ecu is mounted on the firewall at the back of the side pods, so not far from yours. Not sure how you will extricate the ignition switch wire or will you just route one back from the engine bay?
I need to use the power wire that will feed the engine ecu to feed the twin fans on my aircon condenser, via a relay, switched by the Ultima loom so I hope they don't create interference (I don't think they will).
Paul
Hey Fella's
Wiring is pretty much my bag.
I am willing to help where I can foc. :-)
I used an LS3 stock loom and ECU as the basis template of my custom loom. Now I have a very small and neat loom and the wiring cannot be easily seen. Also major components can just be unplugged via a single Deutsch Autosport connector and the front / mid and read are also separate plug in components. On the drivers side whatsit (the little access pod to the door dampers) is where I put my custom fuse and relay box. Simply remove the aluminium access hole cover and the fuse box etc is right there in front of you :-)
I never purchased a factory loom, just built my own.
Gareth
Wiring is pretty much my bag.
I am willing to help where I can foc. :-)
I used an LS3 stock loom and ECU as the basis template of my custom loom. Now I have a very small and neat loom and the wiring cannot be easily seen. Also major components can just be unplugged via a single Deutsch Autosport connector and the front / mid and read are also separate plug in components. On the drivers side whatsit (the little access pod to the door dampers) is where I put my custom fuse and relay box. Simply remove the aluminium access hole cover and the fuse box etc is right there in front of you :-)
I never purchased a factory loom, just built my own.
Gareth
GarethGTR said:
Hey Fella's
Wiring is pretty much my bag.
I am willing to help where I can foc. :-)
I used an LS3 stock loom and ECU as the basis template of my custom loom. Now I have a very small and neat loom and the wiring cannot be easily seen. Also major components can just be unplugged via a single Deutsch Autosport connector and the front / mid and read are also separate plug in components. On the drivers side whatsit (the little access pod to the door dampers) is where I put my custom fuse and relay box. Simply remove the aluminium access hole cover and the fuse box etc is right there in front of you :-)
Some pictures would be very helpfull if you have them Gareth.
Paul
I never purchased a factory loom, just built my own.
Gareth
Wiring is pretty much my bag.
I am willing to help where I can foc. :-)
I used an LS3 stock loom and ECU as the basis template of my custom loom. Now I have a very small and neat loom and the wiring cannot be easily seen. Also major components can just be unplugged via a single Deutsch Autosport connector and the front / mid and read are also separate plug in components. On the drivers side whatsit (the little access pod to the door dampers) is where I put my custom fuse and relay box. Simply remove the aluminium access hole cover and the fuse box etc is right there in front of you :-)
Some pictures would be very helpfull if you have them Gareth.
Paul
I never purchased a factory loom, just built my own.
Gareth
Since we're talking wiring loom here can I get a bit more specific and ask about the starter button... I have bought an alloy starter button that only handles low current switching. I'm guessing I'll need a relay of some sort to handle the higher current required, so can anyone recommend one or let me know if it comes with the factory fuse and relay kit which I've yet to open. I could go and look at the wiring diagram and try and figure out all the relays and stuff in the bag, but I'm hoping someone can give me a quick and easy answer to save me an hours work.
chucknorris said:
Since we're talking wiring loom here can I get a bit more specific and ask about the starter button... I have bought an alloy starter button that only handles low current switching. I'm guessing I'll need a relay of some sort to handle the higher current required, so can anyone recommend one or let me know if it comes with the factory fuse and relay kit which I've yet to open. I could go and look at the wiring diagram and try and figure out all the relays and stuff in the bag, but I'm hoping someone can give me a quick and easy answer to save me an hours work.
The Factory loom already has a starter relay so your button will be fine.Steve
No I'm looking for a single crank to run 24 cylinders and I'm going to stick the engines end to end just like these twin hyabusa powered cars... Only difference is I'm building a real mans car! ;-)
Back on topic however, can anyone enlighten me about this starter button relay please?
Cheers
Pete
Back on topic however, can anyone enlighten me about this starter button relay please?
Cheers
Pete
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