'81 to '83 Rx7 Power Antennas

Factory relay and aftermarket stereos

The factory stereo grounds the antenna line when the tuner is turned on. Most other stereo (like Sony) supply +12V when the tuner is turned on. To use the factory relay with an aftermarket stereo make the following changes to the 8 pin connector (G-01) at the antenna relay. The wire color codes are in [].:

Disconnect pins 1 & 8 from each other. Remove pin 8.
pin 1 [LR] remains connected to 12V+ accessory
Move pin 5 [LG], the antenna control output from the stereo to pin 8 (should have been connected to factory stereo).
Connect pin 5 to ground using the wire removed from pin 8.

Changing the antenna to go down when you turn off the key

Move pin 1 to a +12V source that is on all the time like the cigarette lighter, your antenna will go down when you turn the key off... Make sure your 12V source is fused.

Disclaimer:

I've implemented this on an '81 GSL and an '82 GSL. It should work on any similar relay on other years as well. John Schubert
I take no responsibility for the accuracy of this information or electrical damage that may result from improper wiring.

**Wiring Color Code**
Code	Color	Code	Color
B	Black	Lg	Light Green
Br	Brown	O	Orange
G	Green	R	Red
Gy	Gray	W	White
L	Blue	Y	Yellow
Lb	Light Blue

Wiring Diagram
© 1980 Toyo Kogyo Co.,Ltd.
Used without permission. Hopefully Mazda doesn't mind...

Addendum for '84/'85, untested.

Looks like the same relay is used, just different color wires...

Disconnect pins 1 & 8 from each other. Remove pin 8.
pin 1 [LW] remains connected to 12V+ accessory
Move pin 5 [LO], the antenna control output from the stereo to pin 8 (should have been connected to factory stereo).
Connect pin 5 to ground using the wire removed from pin 8.

Ref.: section J, 1984 Mazda RX-7 Wiring Diagram.

$Date: 2006/11/28 07:33:02 $