Amp delays turning on
Thread Starter
Instructor
Joined: Nov 2010
Posts: 174
Likes: 2
From: Houston TX
Amp delays turning on
I have had my audio system installed and working great for some time. Yesterday, after an oil change, I notice that when I turn the radio on there is about a 30 second delay before my amp turns on. Anyone know why this should be occurring or why it started doing that all of a sudden.
I have a Pioneer 4300DVD head unit and a Kenwood XR5S amp.
I have a Pioneer 4300DVD head unit and a Kenwood XR5S amp.
Thread Starter
Instructor
Joined: Nov 2010
Posts: 174
Likes: 2
From: Houston TX
Would you know which one is the remote wire? You mean from the power cable coming off the battery?
This problem also just started after the dealer turned on the "after blower" on the air conditioning cause I was getting musty smell from it. You don't think there is any relationship?
This problem also just started after the dealer turned on the "after blower" on the air conditioning cause I was getting musty smell from it. You don't think there is any relationship?
Last edited by thptrek; Jun 22, 2011 at 08:43 AM.
Le Mans Master
Joined: Jun 2004
Posts: 9,289
Likes: 16
From: Skippack PA
St Jude Donor '13
Would you know which one is the remote wire? You mean from the power cable coming off the battery?
This problem also just started after the dealer turned on the "after blower" on the air conditioning cause I was getting musty smell from it. You don't think there is any relationship?
This problem also just started after the dealer turned on the "after blower" on the air conditioning cause I was getting musty smell from it. You don't think there is any relationship?
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
Any chance it only happens when you're listening to an ipod controlled by the HU? On rare occasions my HU will take a few minutes to recognize the ipod is there, then eventually start playing music after 30-60 seconds. If that's what you were listening to when you turned the car off/on it may just look like the amp isn't turning on.
Thread Starter
Instructor
Joined: Nov 2010
Posts: 174
Likes: 2
From: Houston TX
Mark, it is happening everytime. I need to check the trigger wire. What I don't understand is if no power is getting through the trigger wire to turn on the amp, then how come after the HU is on for about 30 seconds, the amp does come on?
This is probably unrelated but it only started after my oil change and having the dealer turn on the air conditioning after blower. Another thing that just started is that the car chime goes off after I start the car (about 20 seconds after starting the car) and then every so often it may go off. I thought it was signalling an error message or car problem but nothing is displayed on the dash. Odd.
This is probably unrelated but it only started after my oil change and having the dealer turn on the air conditioning after blower. Another thing that just started is that the car chime goes off after I start the car (about 20 seconds after starting the car) and then every so often it may go off. I thought it was signalling an error message or car problem but nothing is displayed on the dash. Odd.
Le Mans Master
Joined: Jun 2004
Posts: 9,289
Likes: 16
From: Skippack PA
St Jude Donor '13
Mark, it is happening everytime. I need to check the trigger wire. What I don't understand is if no power is getting through the trigger wire to turn on the amp, then how come after the HU is on for about 30 seconds, the amp does come on?
This is probably unrelated but it only started after my oil change and having the dealer turn on the air conditioning after blower. Another thing that just started is that the car chime goes off after I start the car (about 20 seconds after starting the car) and then every so often it may go off. I thought it was signalling an error message or car problem but nothing is displayed on the dash. Odd.
This is probably unrelated but it only started after my oil change and having the dealer turn on the air conditioning after blower. Another thing that just started is that the car chime goes off after I start the car (about 20 seconds after starting the car) and then every so often it may go off. I thought it was signalling an error message or car problem but nothing is displayed on the dash. Odd.
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Thread Starter
Instructor
Joined: Nov 2010
Posts: 174
Likes: 2
From: Houston TX
Thanks, Komoman. I don't understand how the dealer by turning on the after blow for the a/c could affect things but like you said smoke & fire.
I still need to check the trigger wire and see what is up with that.
I still need to check the trigger wire and see what is up with that.
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
Nothing the dealer did could have affected the aftermarket HU. If the radio is turning on, but the amp isn't, then you have an issue with the HU.
If the HU isn't coming on either, I'd look at the interface adapter.
If you're getting +12 on the trigger as soon as the radio fires up, then it's the amp.
If the HU isn't coming on either, I'd look at the interface adapter.
If you're getting +12 on the trigger as soon as the radio fires up, then it's the amp.
Thread Starter
Instructor
Joined: Nov 2010
Posts: 174
Likes: 2
From: Houston TX
The HU turns on fine, no problem there.
The amp does not turn on right away. it turns on about 20-30 seconds later. Once the amp turns on it plays just fine.
Besides the trigger wire, could a bad ground wire cause this?
The amp does not turn on right away. it turns on about 20-30 seconds later. Once the amp turns on it plays just fine.
Besides the trigger wire, could a bad ground wire cause this?
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
It could be the ground wire, but it seems odd that it would only act up on startup.
With the car off, put a DC meter on the trigger and amp ground. Turn on the car and watch the meter right next to the HU. The meter should show 12v almost immediately after the HU powers up. If it does, but the amp doesn't power up, the problem is with the amp.
With the car off, put a DC meter on the trigger and amp ground. Turn on the car and watch the meter right next to the HU. The meter should show 12v almost immediately after the HU powers up. If it does, but the amp doesn't power up, the problem is with the amp.
Thread Starter
Instructor
Joined: Nov 2010
Posts: 174
Likes: 2
From: Houston TX
It was the Metra adapter unit. The HU was sending out the trigger voltage but it was not getting through the adapter. We just bypassed the adapter and connected the HU trigger wire directly to the amp. All is fine now.
