rcreweread Posted March 5 Report Share Posted March 5 Hi all - in a job lot of parts, I have a Lucas 6RA relay with the number 33214B followed by 12V ( voltage I presume) and 8 61 ( date I presume - it only has 3 terminals W1, C1 and C2 Anyone know what this can be used for? I presume because it only has a W1 terminal, the casing has to be earthed? I checked the table on a recent post IDing lots of these, but this serial number isn't mentioned. Any help much appreciated Cheers Rich Quote Link to post Share on other sites
pfenlon Posted March 5 Report Share Posted March 5 Overdrive? perhaps. Quote Link to post Share on other sites
RogerH Posted March 5 Report Share Posted March 5 The TR4A Horn relay has that lay out C1, C2, W1. The OD has C1, C2, W1, W2 Roger Quote Link to post Share on other sites
BlueTR3A-5EKT Posted March 5 Report Share Posted March 5 (edited) Horns is my guess like Roger states above. Edited March 5 by BlueTR3A-5EKT Quote Link to post Share on other sites
tthomson Posted March 5 Report Share Posted March 5 (edited) It is the Horn relay on a TR4A as Roger intimated. There is an internal connection between the coil and one of the contacts, but I don't remember exactly what to what, but easy enough to determine using a simple multimeter. Tony Edited March 5 by tthomson Typo Quote Link to post Share on other sites
rcreweread Posted March 5 Author Report Share Posted March 5 Thanks everyone - that makes sense. Does the fact that there is no W2 terminal mean that the casing has to be earthed ( I know they are in use for the horn)? I thought the W terminals were for the switching circuit and the C terminals were for the heavy power in and out, so why do some have a W2 terminal? Sorry for being an electrical numpty Cheers Rich Quote Link to post Share on other sites
RogerH Posted March 5 Report Share Posted March 5 Hi Richard, it just helps with flexibility. Possibly a few pennies less to make without W2 Roger Quote Link to post Share on other sites
tthomson Posted March 5 Report Share Posted March 5 Hi Richard, The cases are not normally earthed. W2 is connected internally to C2 (I think, but best to check which), If I am correct, C2 (the conjoined connector), is connected to the supply, C1 is connected to the horn and W1 to the horn press. Tony Quote Link to post Share on other sites
RAHTR4 Posted March 6 Report Share Posted March 6 Hi Rich, You have a P.M. Regards, Richard Quote Link to post Share on other sites
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