Have wiring Qs for new stereo on my 79SA
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Eats, Sleeps, Dreams Rotary
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Joined: Jul 2001
Posts: 3,383
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From: Stinson Beach, Ca
Have wiring Qs for new stereo on my 79SA
IS the ignition on a blue wire w/ black stripe in the stero dash wiring area.
It gives me proper voltage w/ ign key on, but it bleeds down by about .01v a second slowly from the proper 12v or so when ign is in to near 0v after a few mins.
And what is the wire for the antenna? Is that a red w/ green stripe?
Does the antenna even have a power on wire? Or does it just come up when the stero is powered (i.e. senses something in the wiring and not directly wired).
Oh, btw car is a very early 79 SA,
merry xmas!!!
Oh ok, so removed the neg batt cable, and its still ticking down by .01v/sec.....Some sorta capacitor attached to this wire I assume.
It gives me proper voltage w/ ign key on, but it bleeds down by about .01v a second slowly from the proper 12v or so when ign is in to near 0v after a few mins.
And what is the wire for the antenna? Is that a red w/ green stripe?
Does the antenna even have a power on wire? Or does it just come up when the stero is powered (i.e. senses something in the wiring and not directly wired).
Oh, btw car is a very early 79 SA,
merry xmas!!!
Oh ok, so removed the neg batt cable, and its still ticking down by .01v/sec.....Some sorta capacitor attached to this wire I assume.
Banned. I got OWNED!!!
Joined: Nov 2009
Posts: 565
Likes: 0
From: Waycross Ga
IS the ignition on a blue wire w/ black stripe in the stero dash wiring area.
It gives me proper voltage w/ ign key on, but it bleeds down by about .01v a second slowly from the proper 12v or so when ign is in to near 0v after a few mins.
And what is the wire for the antenna? Is that a red w/ green stripe?
Does the antenna even have a power on wire? Or does it just come up when the stero is powered (i.e. senses something in the wiring and not directly wired).
Oh, btw car is a very early 79 SA,
merry xmas!!!
Oh ok, so removed the neg batt cable, and its still ticking down by .01v/sec.....Some sorta capacitor attached to this wire I assume.
It gives me proper voltage w/ ign key on, but it bleeds down by about .01v a second slowly from the proper 12v or so when ign is in to near 0v after a few mins.
And what is the wire for the antenna? Is that a red w/ green stripe?
Does the antenna even have a power on wire? Or does it just come up when the stero is powered (i.e. senses something in the wiring and not directly wired).
Oh, btw car is a very early 79 SA,
merry xmas!!!
Oh ok, so removed the neg batt cable, and its still ticking down by .01v/sec.....Some sorta capacitor attached to this wire I assume.
Thread Starter
Eats, Sleeps, Dreams Rotary
iTrader: (1)
Joined: Jul 2001
Posts: 3,383
Likes: 3
From: Stinson Beach, Ca
Stock harness has already been previously modified for aftermarket hadunit and A/C switch.
No longer stock.
Is totally wired besides the ACC wire.
Only require clarification of what is up w/ the slow Voltage bleeddown and if my nice new headunit is safe while receiving 6v and 3v a few minutes after its off.....I have no seen this wire hit 0v yet......
will this kill my batteria?
-Ben Martin
No longer stock.
Is totally wired besides the ACC wire.
Only require clarification of what is up w/ the slow Voltage bleeddown and if my nice new headunit is safe while receiving 6v and 3v a few minutes after its off.....I have no seen this wire hit 0v yet......
will this kill my batteria?
-Ben Martin
Banned. I got OWNED!!!
Joined: Nov 2009
Posts: 565
Likes: 0
From: Waycross Ga
Stock harness has already been previously modified for aftermarket hadunit and A/C switch.
No longer stock.
Is totally wired besides the ACC wire.
Only require clarification of what is up w/ the slow Voltage bleeddown and if my nice new headunit is safe while receiving 6v and 3v a few minutes after its off.....I have no seen this wire hit 0v yet......
will this kill my batteria?
-Ben Martin
No longer stock.
Is totally wired besides the ACC wire.
Only require clarification of what is up w/ the slow Voltage bleeddown and if my nice new headunit is safe while receiving 6v and 3v a few minutes after its off.....I have no seen this wire hit 0v yet......
will this kill my batteria?
-Ben Martin
1979 Mazda RX7 Car Audio Wiring Guide
Car Radio Battery Constant 12v+ Wire: Blue/Red
Car Radio Accessory Switched 12v+ Wire: Red/Black
Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: Blue/White
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4″
Car Audio Front Speakers Location: Kick Panels
Left Front Speaker Positive Wire (+): Blue/Red
Left Front Speaker Negative Wire (-): Blue/Yellow
Right Front Speaker Positive Wire (+): Blue
Right Front Speaker Negative Wire (-): Blue/White
Car Audio Rear Speakers Size: 6 1/2″
Car Audio Rear Speakers Location: Side Panels
Left Rear Speaker Positive Wire (+): Blue/Red
Left Rear Speaker Negative Wire (-): Blue/Green
Right Rear Speaker Positive Wire (+): Blue/White
Right Rear Speaker Negative Wire (-): Blue/Green
That what it should be. However if someones changed stuff it may nolonger be correct. Ign and Acc wires can sometimes bleed off but on this early of a car I doubt that it would do this.
Car Radio Battery Constant 12v+ Wire: Blue/Red
Car Radio Accessory Switched 12v+ Wire: Red/Black
Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: Blue/White
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4″
Car Audio Front Speakers Location: Kick Panels
Left Front Speaker Positive Wire (+): Blue/Red
Left Front Speaker Negative Wire (-): Blue/Yellow
Right Front Speaker Positive Wire (+): Blue
Right Front Speaker Negative Wire (-): Blue/White
Car Audio Rear Speakers Size: 6 1/2″
Car Audio Rear Speakers Location: Side Panels
Left Rear Speaker Positive Wire (+): Blue/Red
Left Rear Speaker Negative Wire (-): Blue/Green
Right Rear Speaker Positive Wire (+): Blue/White
Right Rear Speaker Negative Wire (-): Blue/Green
That what it should be. However if someones changed stuff it may nolonger be correct. Ign and Acc wires can sometimes bleed off but on this early of a car I doubt that it would do this.
1979 Mazda RX7 Car Audio Wiring Guide
Car Radio Battery Constant 12v+ Wire: Blue/Red
Car Radio Accessory Switched 12v+ Wire: Red/Black
Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: Blue/White
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4″
Car Audio Front Speakers Location: Kick Panels
Left Front Speaker Positive Wire (+): Blue/Red
Left Front Speaker Negative Wire (-): Blue/Yellow
Right Front Speaker Positive Wire (+): Blue
Right Front Speaker Negative Wire (-): Blue/White
Car Audio Rear Speakers Size: 6 1/2″
Car Audio Rear Speakers Location: Side Panels
Left Rear Speaker Positive Wire (+): Blue/Red
Left Rear Speaker Negative Wire (-): Blue/Green
Right Rear Speaker Positive Wire (+): Blue/White
Right Rear Speaker Negative Wire (-): Blue/Green
That what it should be. However if someones changed stuff it may nolonger be correct. Ign and Acc wires can sometimes bleed off but on this early of a car I doubt that it would do this.
Car Radio Battery Constant 12v+ Wire: Blue/Red
Car Radio Accessory Switched 12v+ Wire: Red/Black
Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: Blue/White
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4″
Car Audio Front Speakers Location: Kick Panels
Left Front Speaker Positive Wire (+): Blue/Red
Left Front Speaker Negative Wire (-): Blue/Yellow
Right Front Speaker Positive Wire (+): Blue
Right Front Speaker Negative Wire (-): Blue/White
Car Audio Rear Speakers Size: 6 1/2″
Car Audio Rear Speakers Location: Side Panels
Left Rear Speaker Positive Wire (+): Blue/Red
Left Rear Speaker Negative Wire (-): Blue/Green
Right Rear Speaker Positive Wire (+): Blue/White
Right Rear Speaker Negative Wire (-): Blue/Green
That what it should be. However if someones changed stuff it may nolonger be correct. Ign and Acc wires can sometimes bleed off but on this early of a car I doubt that it would do this.
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