When I used to do daft things to Vauxhall’s they always had a separate engine loom, even if you had to separate it from the main loom, about 5 wires to be connected to the new car and that was it
This one is not too bad. The engine and ecu are on one loom with a 30 pin connection. The battery/alt/starter are on another with the main fuse box. Then unfortunately there are a few ecu inputs that come through the general loom with everything else.
Must resist the urge to start cutting!
I wish the honda had had a loom like that, the bloody thing tee-d off in about 96 places into loads of little ring-main type setups. I ended up just giving up and chopping off the connectors I couldn't buy and binning the rest
Gave up trying to remove the circuits I don't need and just looked at the wiring loom/ECU plug and the main fuse plug and identified what I needed. Removed everything else in one go! -
Unfortunately the 03 US wiring diagram I had was not completely the same and a lot of stuff changed 02-03. Resulting in a stressed few hours trying to figure out why the ECU was not turning on the main relay - only to discover with a slightly different diagram that I had removed the earth for the main relay coil thinking it was for the headlight adjuster - which it was as well
What's left over
Now it runs but idle is low and slightly erratic so off on a sensor hunt - though I have not actually removed any except the speed sensor so that might be it.
Removed a few, but that was the only one between running properly with full loom and running badly with the cut down loom.
It's an odd one as it is a gearbox driven VR type that goes to the odometer computer to have its nasty signal cleaned up, then output as a nice square wave to the ECU and speedo.
As I don't have the gearbox to drive it from I will need to see if I can get away with feeding a square wave in from a wheel sensor of some description, probably through an Arduino - if not I will need to hack the instrument panel tracks...
Found a neat solution for the Neutral switch. Unfortunately the thread on the switch is M14 very coarse thread that I could not find a bolt or tap for anywhere - so I cut out the bit of Ali gearbox it went into to hold it onto a bracket. Ground a groove in the shaft. Fine adjustment with shims... OK.. a washer and a flap disc
Then to my absolute amazement I switched it on, and so far it ALL works, lights, horn indicators, back lights, engine, fuel gauge. Fingers crossed for the clutch and shaft/bearings when I get that all spun up!
- Though it does have an odd mix of coloured bulbs for back lighting..
Then I "carefully" removed the handbrake as it was original - That's next to fix!
And in other news.. It's Official ! The DVLA sent me a new V5 with the new engine noted on it
Done. Goes forwards, backwards and stops - but it's raining so no proper test yet. Awaiting split conduit for wiring tidy and need a better throttle cable solution but that's it for now...
Took it out for a tentative drive and nothing blew up, fell off or disintegrated so that's a plus! Goes like stink too
I worked out the conversion factor for the SGI-5E to convert the Porsche ABS ---> Speedo conversion and it seems to be bang on - need to check with GPS
Need to re-locate the mirrors, adjust the handbrake and find something else just as interesting to do in the evenings or I will go mad!