Defrroster question.

[Ed Brock]

Hi, I'm new to this site. I'm very impressed with the knowledge on this site.

My question is about the rear window defroster on a EARLY '71 240. This car does not have a defroster relay. Does the rear window defroster wires get a full 12v? Is it resisted down and if it is what is the voltage at the wires?

7tooZ has supplied me with great information and thought I should ask the members. I just have this one question left so I can finish this job.

Thanks Ed 

[cgsheen1]

Here's the wiring schematic from the 1971 240-Z Sports Supplement to the Factory Service Manual.

12V Power to the "Heat - Glass" comes from the Accessory Relay through a 20amp in-line fuse (one of the blue (L) wire in-line fuse holders behind the heat/vent control panel) to the switch (heat glass sw.), then directly to the glass. 

(I don't see any mention of hatch glass heat in the Series One FSM or anything in the wiring schematic although we know that the 1970 240Z did indeed have that installed.)

 

1971 240Z FSM Supplement schematic.pdf

Edited May 3, 2020 by cgsheen1