pfenlon Posted February 20 Report Share Posted February 20 Lucas 6RA 33231D 12v 1 68 Its a hazard relay for a 250. AFAIK the only replacement is the Bosch Square type one. thanks in Anticipation, Pete. Quote Link to post Share on other sites
RobH Posted February 20 Report Share Posted February 20 (edited) It's a sort of double pole 'make' relay. The modern Lucas equivalent is SRB 400 but that is in a round can: https://www.autoelectricalspares.co.uk/lucas-srb400--33231--33333--33361--33365-26ra-12v-2-x-20a-relay-2347-p.asp The pin connection numbers are the modern variety. For that one W1= 85, W2= 86, C2 = 30/51, C1 = 87, C4 = 87a Edited February 20 by RobH Quote Link to post Share on other sites
BlueTR3A-5EKT Posted February 20 Report Share Posted February 20 (edited) Triumph part no 142169. Available from Revington and John Craddock. https://www.johncraddockltd.co.uk/142169-relay-6ra.html I’d check the Craddock one is a 12 volt 5 terminal tin one though. Ask for photo. Edited February 20 by BlueTR3A-5EKT Quote Link to post Share on other sites
Pridewood Posted February 20 Report Share Posted February 20 (edited) Hello, (possibly not the right one for contolling the A-Type overdrive-unit?) https://www.ebay.com/itm/364618486780?itmmeta=01HQ43SS8EER1PGYRB1ZJ3K2VR&hash=item54e4f493fc:g:edkAAOSwzUNlcVs2&itmprp=enc%3AAQAIAAAA0OR0iKWO2MIMbmxcyTopDc6Nq5KLE695BS2FnbJHVs3gC1rnj5XhBBGPI76fhmdh%2FmF4ot0H%2Bz%2F1cHBQ3msAVBOz3bRqb5NM1SgtO6PS3NKsuiHqfylAdRVU%2Fpyzrs6fSyxVqEkA6q%2FHz%2BuUiactAdsB23VNt9gMyPzfU%2FCXux7AqinQNaPGqouqVFjdO5AjyTmdKicH%2Fjdc6tdlPbfQX69Su7Q8BZVOR%2F%2BHIUSK0mZ3S1EQPLPqGyIADwtcb%2BXL7gw%2B9vKGup4qRXjhk7TrDBc%3D|tkp%3ABk9SR6aU54O5Yw Best regards John Edited February 20 by Pridewood Quote Link to post Share on other sites
RobH Posted February 20 Report Share Posted February 20 Wrong relay John. That is a 33213 not a 33231 Quote Link to post Share on other sites
keith1948 Posted February 20 Report Share Posted February 20 From a thread back in 2017 "Relay 6RA which one"..................... I have been trawling auto jumbles and restoration shows trying to find 'original' Lucas 6RA relays to fit to TR for headlamp relays. Like Steve I have been on a steep learning curve. 6RA simply refers to type of casing not what is within. For that you need to know the SRB number or 33*** number. For headlamp, normally open 12v relay either SRB111 (33302) or SRB113 (33316) are the ones. Only difference is that pin C1 is double or single respectively. There is a good reference chart in this link: http://tvrna.tvrccna.org/lucas/lucas-relays-6ra.htm SRB131 I think is 33252A, SRB146 is 33222 and 33231 I think is SRB400 to add to this chart. As you will see there are normally open and normally closed and change over as well as 24v and 12v types all called 6RA. The link helpfully gives internal wiring of the relays. I have seen repro Lucas relays for sale but no idea how good or bad these are. Very often the metal casing of these has no id marks on at all which doesn't help. I once saw a Ford Escort Mexico at a show with a bank of normally closed relays being used for the headlamps. Not sure how the owner would have wired these up (I would have chosen normally open) but no doubt one of the experts out there will know. Keith Quote Link to post Share on other sites
RobH Posted February 20 Report Share Posted February 20 (edited) Well done Keith - I've been searching for a chart like that for ages ! The info I had gleaned so far is in bits and pieces from all over but that ties it together nicely. Edited February 20 by RobH Quote Link to post Share on other sites
keith1948 Posted February 21 Report Share Posted February 21 11 hours ago, RobH said: Well done Keith - I've been searching for a chart like that for ages ! The info I had gleaned so far is in bits and pieces from all over but that ties it together nicely. Hi Rob The one key thing I discovered was that Lucas had different code numbers for essentially the same internal bits for a relay but with different fixing brackets and double vs single terminals. This means that many of the 6RA relays are interchangeable. The only one on my TR that is different is the Clear Hooters relay for the horns. There is no exact Lucas match (that I have found) for that. Keith Quote Link to post Share on other sites
Dave I O W Posted February 21 Report Share Posted February 21 16 hours ago, pfenlon said: Lucas 6RA 33231D 12v 1 68 Its a hazard relay for a 250. AFAIK the only replacement is the Bosch Square type one. thanks in Anticipation, Pete. Hi Pete you have a pm Quote Link to post Share on other sites
RobH Posted February 21 Report Share Posted February 21 59 minutes ago, keith1948 said: The one key thing I discovered was that Lucas had different code numbers for essentially the same internal bits for a relay but with different fixing brackets and double vs single terminals. Yes I get the impression Lucas almost made bespoke relays for each model car ! Obviously they hadn't heard of standardisation as they could have made (say) four basic types which would have cut their production costs, and the car makers could easily have made the looms to suit. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted February 21 Report Share Posted February 21 40 minutes ago, RobH said: Yes I get the impression Lucas almost made bespoke relays for each model car ! Obviously they hadn't heard of standardisation as they could have made (say) four basic types which would have cut their production costs, and the car makers could easily have made the looms to suit. Lucas were a supplier to our entire motor industry, with each manufacturer having their own standards and requirements. Try buying a Lucas simple glass fuse that is to Rolls Royce spec. Your eyes will water. The problem was with the car builders, Thankfully BL rationalised a whole heap of things when they merged parts supply of Jaguar, Daimler, Rover, Land Rover, Triumph Austin Morris MG Austin Healey. The use of the same part numbers for the same item that was sold by different companies was a bit of a win for the parts world, as different prices and availability were common. Lucas lamps were the nearest thing to standard range I think. Their switch gear was not, with column indicator switches with a different coloured warning light bulb cover on the end and a slight length or rake change. Then add in the headlamp flasher…. They were all built on the same basic plastic and metal clamp with the same construction contacts, wiring colours and stalk. Now. Think TR4 indicator switch. It had a Chrome stalk on the originals, by TR5/6 the same switch stalk had gained a black plastic sleeve….fitted over the chrome stalk. Used to do a roaring trade with a Stanley knife ‘creating’ TR 4/4A indicator switches from TR6. I doubt if the remade switches have the same arrangement Quote Link to post Share on other sites
cvtrian Posted February 21 Report Share Posted February 21 17 hours ago, pfenlon said: Lucas 6RA 33231D 12v 1 68 Its a hazard relay for a 250. AFAIK the only replacement is the Bosch Square type one. thanks in Anticipation, Pete. Hi Pete (& anyone else) I have a tin 6RA 33231F in my spares, 5 connectors on the rear if that helps? Good luck Ian Quote Link to post Share on other sites
pfenlon Posted February 21 Author Report Share Posted February 21 Well great response from the forumite's once again. Thanks to everyone, and am expecting one in the post sometime soon, thanks to Dave in the IOW. Just the job, makes membership worthwhile for certain. Quote Link to post Share on other sites
Kenrow Posted February 21 Report Share Posted February 21 A Lucas SRB 301 fits. Its primary for a Jag starter. While it has a lot more tabs on it (9) than original (5), the reference pins C1, C2, C4, W1, W2 match the 250's hazard relay. https://www.ebay.com/itm/224551482175 Quote Link to post Share on other sites
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