green george

Right, I have found 10mm 12v red LED lights on Ebay so have ordered a pack. I also saw the same spec but they flash twice a second which might be more noticeable... decisons decisons! Okay, how do I wire the low pressure switch and warning light up? The low pressure switch has two blade terminals and the low pressure warning light has two wires: I think the circuit should be as follows: 12v feed from an ignition live wire goes to one terminal on the oil pressure warning lamp. The other terminal, (the ground), then connects to the terminal on the Oil Pressure sender: when there's sufficient oil pressure the switch in the sender is open and there's no light lit. BUT, when the pressure drops below the senders trigger level, its internal switch closes and the current flows through the bulb, through the sender into the engine block and back via the blocks ground strap to the negative terminal on the battery. Does a ground wire normally have a specific colour? Lastly, what sort of electrical connector would you recommend for "tapping into an ignition live power source? I presume something like this would do: eBay item number: 180735526749 ? Described as Add A Circuit Fuse Tap Piggy-Back Standard Blade Fuse Holder ATO ATC 12v 24v . This replaces a fuse in the fuse box which allow two (2) fuses to piggy back the same socket. The 1st fuse of the original equipment the second provides a switched live. Looks quite good. Any view on its suitability? I presume the Caterham uses standard blade fuses? My car is not readily available at the moment for me to check. Many thanks George

Hi Christian that sounds like advice well worth heeding. Thank you!

Thanks Paul! I can certainly take photos but will need someone help with the install of the lower pressure switch wiring and light. Just trying to figure out how to cut through my carbon fibre dash to fit the warning light.... I wonder if I can source a smaller but bright red LED? Anyway there is no rush and will probably wait for the brighter evenings

Visited Think Auto yesterday and purchased the kit. Just need some warmer weather and I can test fit to see where it all goes.

Hi I have a 1.6 EU2 K-Series engine. I will make contact with Think Auto. Regards George

Hi John I would very much like to take your advice and perhaps have a look at your set up. Do you run a low oil pressure light? Regards George

Hi JV I haven't bought the kit yet I am waiting to work out how to do it first; although I will definitely want a low pressure light.

F355GTS - Thank you for your offer to assist. I may well be in contact although I hope to find someone in the South Bucks / West Herts area. John - Thank for the guides. Tony C's guide shows the T piece but it appears that the T piece ends in the engine bay with the pressure sender and another set of electrical contacts presumably to an electric gauge; so this is a remote sender set up as opposed to a mechanical gauge (with a capillary tube plumbed into the back of it. Having had a quick look I cannot find any recent activity on Blatchat for Tony C leading me to conclude he is no longer active on this forum (although I have BM'd just in case). Can I ask the Lotus Seven Club management team consider writing a definitive how to guide for mechanical oil pressure senders and gauges with and without a low pressure warning light? (E-mail sent to "ask the team"). After all this is clearly a weak area on the K series engined 7's and there is not currently clear guidance on how to fit the parts as listed within Blatchat. Q: Would there be interest from other members for a definitive guide on the subject?

I am keen to fit the Think Auto supplied kit but a fitting guide with photos would be helpful. Does one exist? I am struggling to find one with hyper links that still work... Lots of posts but no guides. In general terms am I right in thinking: 1) remove existing sender 2) run aeroquip capillary tube through the grommet on top of the gear box 3) fix to rear of new gauage - But, where is the T piece fixed? - The T piece allows for a low pressure light/led be utilised? Is there anyone near Bovingdon (HP3) who would be able to assist as I am not confident with wiring etc?

All sorted and easily installed. Very pleased.

I will have it if it is still available.

Thanks everyone. I will give them a call tomorrow.

Spotted at about 1500 hours racing green towards Chesham. I am based in Bovingdon, would be great to compare notes if you are local.

No, but theirs is the only plug and play loom I have seen, which is something I am after.

Hello I have just read the excellent guide on fitting a high brake light and immediately bought the light but unfortunately Caterham are showing no stock on the wire loom.... Is there anywhere I can try?