Jonathan Kay

That's off a post-2001 K! I can email the diagram if you send me a Private Message with your address. Duratec engine, it was Raceline's development car originally! Do you know any more about the history of the chassis/ car? Jonathan

Does it look like this? That Slate is probably your Grey. Jonathan

Let's all try and find that on the factory diagrams... but I was expecting 7... ? Jonathan

Can you list the colours of all of the wires on the loom side of that connector? Jonathan

I forgot about the sender .....So if an open fuel sender wiper is ok I guess a brushed motor is also Yes, same line of explanation. Jonathan

The carbon monoxide produced by a cigarette was interesting! Everything about carbon monoxide poisoning is interesting! I teach medical students about it but there's less than there was. Anyone like to guess how many deaths each year? Jonathan PS: It's still a common plot line.

I don't think it's been said explicitly: the terminal for the warning light is often smaller than the others. Jonathan

#34: I'd work on that basis. Have a good look around the terminal of interest to see if you can find an identifying letter. If there isn't one I'd probably make a test lead to measure the voltage to earth at the terminal of interest with the ignition on and the engine off and then with it running. Or you could make a replica warning light circuit. Or you could use the existing one. It would be worth locating the 14 pin plug/socket that connects to the main vehicle loom. It may be the case that the brown/yellow doesn't make it to the other side... Yes. I'd thought of starting at the distal end to see if it's been cut and wrapped but that might be more efficient. Clearly not as standardised as I thought! Not even the identifying letters are standardised! :-) Jonathan

Did they reinforce that with a practical? Jonathan

Thanks, Andrew. It's a bit odd having black wires on the main terminals as black is usually reserved for earths. My working explanation for that is: ... it was Raceline's development car originally! And I'm also working on the assumption that that's when they didn't reconnect the wire to the lamp. Jonathan

was sent to brise and told could no repair it. offered a new one at £300 Do you want any help on other options? Jonathan

Why doesn’t that blow fuses? I presume that it's because the electrical conductance of the petrol is too low. As a supplementary question, the pump motor potentially produces sparks (if of a certain type) isn’t that a problem in a fuel tank? A couple of guesses. Because there isn't enough oxygen to ignite the fuel? Or because there isn't a spark if whatever causes it in air doesn't happen in petrol. I prefer the first as we don't hear about ignition when fuel pumps are run in tanks containing very little liquid petrol. Jonathan PS: Inflammable oil is commonly used in transformers etc as a coolant. And IIRC the petrol does cool the pump in ordinary cars. PPS: Ordinary bullets don't cause car fuel tanks to explode, pace Hollywood (Mythbusters episode 15). And just checking cigarette butts flicked in to the filler...

Maybe its powder form allows a stronger solution to be made rather than the ready mixed acetic acid in the vinegar. Yes. And heat will speed up the effect. Citric acid may not be available as easily as in the past... because it's used to cut drugs of abuse. Jonathan

And, if possible, that Brown/Yellow wire in the loom. Ah... I meant at the engine end of the loom... Jonathan

Green/ White is traditionally "Direction indicator switch to right-hand flasher lamps" and Green/ Red "Direction indicator switch to left-hand flasher lamps". Some Sevens use a single telltale lamp for both indicators (with another weird circuit) and some one lamp for each side. Jonathan PS: "Common colour codes for British Vehicle Wiring", not completely standardised but Caterham mostly stick to these.

What colour are the other two? Possibly a main colour and a trace. Jonathan

As suspected. Now we need to find the right terminal for the missing connection to the warning lamp. And, if possible, that Brown/Yellow wire in the loom. Jonathan

You need to check: The voltage and current rating, but too much of the latter isn't a problem.And that plug size.And the polarity of the plug... amazingly that isn't completely standardised. There's often a little picture showing it.If no-one comes up with one it's possible to buy "universal" chargers. Jonathan

The traditional circuit (ignores other connections at the alternators): So when the alternator isn't charging the lamp sees 12V from the battery and something earth-ish through the alternator and lights up. But when the alternator is charging it sees the same voltage at both sides and doesn't. IIUC some types get the energising current through the warning light circuit and some don't. That's why you can't simply replace the incandescant lamp with an LED. Jonathan

Alternators vary a bit. The energising circuit is needed to get the alternator charging. The traditional warning light circuit is weird but clever, see next post. And usually runs in a brown and yellow cable from the alternator to the light. But have you only got that thick brown and the two black cables connected? No brown and yellow? Is there an unused terminal next to the two blacks... and does it have a letter identifying it? Does anyone recognise that alternator or connector pattern? Jonathan

Would you like a copy of the Handbook and Assembly Guide? Jonathan

Andrew Revill's advice, with photo. Jonathan

Thanks Jonathan

Good idea. Suggested wiring for the 71253/ EET3-1A32-04B. Jonathan PS: But I'm putting my money on it not being connected at the alternator and the energising feed being somewhere else...