Richard Presumably the usual suspects, RT,CP, etc., can't help.50/60's Jaguars and others used a similar set up and having googled it there seem to be a no. of similar looking modern equivalents used to drive cooling fans. There may have been a bad batch around in the '60's because my TE went through about 4 very quickly but has been fine for the last 20+ years. Alvis did not fit the thermo switch to the TF,perhaps fed up with warranty claims & the difficulty of changing the switch? Control of the choke was delegated to the driver who has a little light to remind him he has it on. The wiring diagram is also suitably amended . regards Peter Posted by Peter Martin 06/12/2016 10:58:06