Weekend progress

 Again, more of an 'aide memoire' than any actual decent blog post. I've done most of the wiring loom, I just have four white/red power wires to join up together, and the same for four black ground wires. That gets rid of the spaghetti. Now the next part is to wire in the lights and dashboard.

There's a few blockers to that though. First off is that I seemed to have trimmed an entire lighting section out of the loom!! There should be a connector on the column multi switches that powers the lights, but now I've got to the end of this particular task I have no more connectors. I'll need to go back and see what I removed. It might be that I took each individual wire out in turn, then ended up with an empty connector that I stuffed in the 'spares' box. Once I find the connector I can wire it back in, 

I also need to print out the fuse and relay positioning, again I seem to have quite a few empty holes and I want to make sure I've not unwired something important. I also need to check the relays are still in the right place, for example I know the indicator flasher is wired in but it's missing two of the wires. I need to energise the flasher with some power and then see what comes out. The flasher is listed as;

• Black Ground.
• No connection
• Orange hazard light switch to Black Ground.
• Green Black to left hand lights (front/side/back and tell tale)
• Green Red to direction switch on column
• Green Yellow to direction switch on column
• Green White to right hand lights (front/side/back and tell tale)
• Black Red to fuse block

Looking at the existing wiring in the block, I can see;

NC          GR/RE      OR      BL

BL/RE    GR/YE      NC      NC

If the one below the black is the actual 'no connection' then the other two must be left and right. 

For the lights and dashboard it's all new, so it'll just be lengths of wire of the appropriate colour.

Ah yes, colours... I seem to have some wires that were attached to the loom, and attached to the engine, but neither end is actually attached anymore! I need to find;

• White/Blue. Apparently this is labelled as battery negative. 
• Green/Orange. This is most likely going to be the horn I think?
• White/Black. Off to the alternator for the battery?

None of them go to the ECU so I can rule that out straightaway. I'll have to double check the colours to see if they're actually what I have.

For other wires, I've got Blue Yellow to come from the fluid level sensor and the parking brake switch, when either of them close that puts a ground on the far end of the brake light tell tale to light the bulb. Black Blue for the coolant temp sensor, that'll go direct to the gauge with the other end being grounded.

I also have Yellow Red to come from the oil pressure sensor, again to the oil pressure gauge. 

I feel like it's all starting to come together now. I do have a lot of fused power feeds to go round the car, and there are so many ground points to put in. The grounds are fairly straightforward though, crimped ring connectors screwed to key points on the chassis. 

I'm going to try and get more done during the week, even if it's one or two wire colours a day I'd soon get them all done. Then it's a test, then bind up the wires and secure them ready for IVA. I have a route for the dashboard wires but I will need to make it IVA friendly, there's a sharp 180 degree bend that goes round an aluminium edge, that's just ripe for IVA to fail. 3D printing to the rescue there! Behind the dash it's easier though, the current connectors are in quite close proximity and would be stable enough to hold the wires on their own but it won't take much to add a couple of cable tie brackets to make it extra secure. I'll have to remember to position some next time I get the glue out, which will be when I come to put the fuel filler together. But that will have to wait until I get some more PETG for the 3D printer, I've actually run out of a roll! Only the second roll I've managed to finish too, I must have been doing a huge amount of printing recently. 

Fuel filler

 One more post about the fuel filler, just for my own memory to be honest. The fuel filler neck arrived;

And thankfully it was a usable size, this photo compares it to my moulded one. It's maybe a little larger which is fine. The main frustration is that the Ebay listing said it was new, this was far from new. I don't think it's been used, but the chrome is so tarnished that it looks like it's sat in someone's toolbox for years. It's annoying, but not worth trying to get a refund, after all it's still usable.

The only thing was the angled edges that the cap locks on to, they were simply to severe for the cap to lock. This was expected, I knew I'd be out of luck to get them to work perfectly. Fortunately a few minutes with the dremel got me a shallower angle that the fuel cap could lock to. So that's that.

Now comes the fitting. My idea had been to weld a steel collar on to the tube that would sit inside the bodywork. This neck would then protrude above the body, with maybe a decorative trim to finish it off. Problem is this neck is actually wider than the two inch tube, so I'm not going to be able to weld a collar on and get it to fit through the body. I could make the body hole wider for the neck, but then I'd need to trim it. And again, because the neck is wider than the tube, the trim wouldn't work either. 

I think it's an opportunity for some more 3D printing... Basically I want a bracket to sit under the body. The internal diameter will be for the tube. Then I want an upper lip to fill the hole in the body where the neck needs to fit through. Then the overall part should be wide enough to fix the tube to the body.

Or... I can do the same, but have the tube come in from above. That way I can make the hole only big enough for the tube rather than the neck. I could still use a 3D printed collar to bond everything in place. That would mean I wouldn't need an outer trim, I could just make sure the bodywork hole is tight against the tube. The neck itself would then sit just above the body.

Oh, but that introduces a new problem. When I lock the fuel cap, it needs me to press down on the cap. If I do that too often, I might end up pushing the tube through the collar. However that could be mitigated by my gluing approach, if I use two halves of a collar then I can more easily apply epoxy inside the collar. I could then use a jubilee band during gluing to really press it on there. 

I could also reinforce it by using another 3D printed collar underneath the neck lip. It doesn't need to be much, just enough so the neck sits proud and so the cap has about 1mm clearance to the bodywork. I don't want it to sit on the body because that would scratch the body over time, as well as make it difficult to lock as things wear.

Right, that's my notes sorted, I can come back to that another time. My task for this weekend is to get the loom sorted, or at least get the spaghetti sorted. Even if I don't get all the way to the dash, at least I could get the engine ready to run. Two solid days should be enough, as long as I don't make excuses to avoid it. Like writing a blog post on how to fix a fuel cap...