Lotus Elan

Fan Controller/Otter switch

PostPost by: tonyabacus » Thu Jun 06, 2024 10:03 am

Fitted new wiring harnesses to an S4, but cannot find any connections for the Otter Switch and no mention in the Workshop manual. Can anyone advise where to look.

Have a capillary type water gauge so need to find a way to check the temperature and to switch on the electric fan when needed, any ideas on where else I might locate a fan controller, what type of controller and a relay and finally a wiring diagram.
Thanks
Tony
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PostPost by: stugilmour » Sat Jun 08, 2024 2:33 pm

This one from Burton Power works well. This particular model is used with an M22 threaded boss, fitting in either the radiator top tank or an extended thermostat housing with blanking cap.

https://www.burtonpower.com/revotec-ele ... c-m22.html

Similar kits are available with a radiator hose nipple that can be inserted into the radiator / thermostat top hose. This link shows various sizes.

https://www.burtonpower.com/parts-by-ca ... llers.html

The wiring is pretty simple. This link has the fitting instructions for one of the types, and includes an illustration of the wiring.

https://revotec.com/product/25-mm-id-ho ... ontroller/

HTH

Stu
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