Miata Mailing List: January 1994, Message #88
sponsored by



     


   From: jeffh@ada1.SSD.CSD.HARRIS.COM (Jeff Hollensen)
Subject: Help on power antenna
   Date: Wed, 12 Jan 1994 08:43:56 -0500


   I recently purchased the power antenna from the Mazda dealer
   and am trying to hook it up to me after-market stereo system
   that I've had installed for quite a while.

   The antenna simply refuses to function (i.e. extend).

   I was wondering if anybody can tell me the signals that antenna
   is expecting.  Here is what I see looking at the female portion
   of the harness that the antenna plugs into:


                           /------- top (the tab that connects them)
                          v

                         nn
               +--------------------+
               |   oo A       oo C  |
               |                    |
               |                    |
               |                    |
               |   oo B       oo D  |
               |                    |
               +--------------------+

   A (green with yellow stripe):
   The wire marked A is hot when the power is on AND the radio is on.
   This is normal for many antennas, but I do know (I've been told)
   that the Mazda antenna expects a ground completion circuit here.
   This is not a problem and I already have purchased a relay.
   The problem is that when I test this by simply tying this wire (A)
   to the car ground, the antenna does not go up and I expected it to.

   B (red with black stripe):
   The wire marked B has no connectivity that I can find, whatsoever.

   The wire marked C is hot when the power is on.

   The wire marked D is hot when the power is on.

   Can anybody shed some light on this situation?  
   I'd be really grateful for any help.