Hello Laurence,
Your two 18 watt heating elements will draw about 3 amps.
The rotary coupler (clock spring) currently handles the radio and cruise control controls plus the horn buttons in a relay coil circuit.
All these are very low current consumers, nothing approaching 3 amps. I therefore doubt that the rotary coupler has been manufactured to carry such a load.
You should therefore accept Lee's kind offer of testing the circuit using his spare coupler.
Simon
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"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
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