Possible causes of breakdown

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John Vine
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Sounds like a promising diagnosis.  How many relays do you have, and do you know what each one does?  Can you post a pic?

JV

wild bill
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It's so tight up there that i can't get a pic (despite numerous attempts). There are 3 relays 2 smaller of the same type and one large which seems to operate indicators and hazards (and probably some other stuff) The faulty relay is the middle of the three which is one of the smaller relays. It's pointless replacing them until i can narrow down where the short is

Beagler
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This was mine if this helps, Took with my borescope for another thread.

2019 310S 1.6 Sigma

wild bill
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So last night car is dead as a proverbial. This am I remove the middle relay (top and middle are the same) to get a part number.

Wander in to garage an hour later and think i'll just turn the key and hey presto car starts so ignition relay must be the top one then, but middle relay is still out by my PC so indicators not working. Put middle relay back in and evrything is working. Problem is i'm now unsure of taking the car out as I do not want to breakdown again. I think the answer id to get a voltmeter diagnostic done on the fusebox/relay ignition system by someone who knows what they are doing.

John Vine
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That sounds like progress!

It suggests that your relays are ok after all. I suspect the relay terminals and the spade connectors they plug into may be in need of a good clean.  Try pulling and re-plugging the relays several times to improve electrical contact.  Also check that the spade connectors themselves are correctly located in their housings.

... diagnostic done on the fusebox/relay ignition system...

I agree.  No doubt your neighbour has a tame auto electrician?

JV

wild bill
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Yup John he's proper geeky old school and weird. Folicly challenged but with a pony tail and always in black and sporting an AC DC t shirt with a roly on the go Nuts BUT very good

wild bill
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So there are actually 4 relays and after removing all of them one by one the car starts with none in Silly

So basically i am back to having absolutely no idea why the car stopped and now no way of finding out. Bl**dy kit cars Rofl

John Vine
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As I recall, my 1999 1.8K didn't have an ignition relay.  Assuming your chassis harness is still fundamentally K, your discovery makes some sort of sense.

It looks like some detective work is required.  Can you tell us:

What the four relays do?
What year is your car?
Was it EU2 or EU3?
What changes (if any) were made to the engine and chassis looms when the 2.3D was fitted?

JV

 

Jonathan Kay
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What John says.

I have lots of diagrams with four relays. If you can discover the position and function of as many as possible we can probably work out which loom it is.

Jonathan

 

wild bill
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Well interestingly it's difficult to find out what they all do due to overlap (it was explained to me and i glazed over because it was beyond my brain functionality) I do know that the bottom one is flashers so i'll try and work out what the other do but perhaps Caterham know?

Car is a 1997 K series originally. EU3 i believe and the only loom changes were the actual plugs/connectors.

The only loose wire is the defunct OP wire as i went mechanical after multiple sensor failures.