Quote:
Originally Posted by SouthArk370Z
I have next to no experience with convertible tops (zero with 370Z verts) but I spent several decades doing industrial instrument and electrical work. In my experience, a signal line is low-current and, in this case, would be used to energize a relay that sends power to the heating element. My guess is that the SOFT TOP CONTROL UNIT contains the relay(s) and your problem is with the circuit that tells the STCU to energize the relay. But that's just a guess.
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I don't think that is how it works for the roadsters.
Pressing the defog button does energize a relay and that sends power to the heated mirrors. For the rear window, the power will pass through two 20A fuses before going to the Soft Top Control Module.
The Soft Top Control Module will check the state of the top (open or close) before sending power to the rear window.
This is after studying the wiring diagram that I manage to get.