Jump to content

Welcome to TheMalibuCrew!

As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. It's free and it's easy, so don't hesitate to join the TheMalibuCrew Family today!

Sign in to follow this  
vernonreeve

Why does stereo turn off briefly when engine turns on/off on 2000 Mailibu Response

Recommended Posts

vernonreeve

I have a 2000 Malibu Response lx, and have the radio switch on the dash turn on to provide power to the head unit.  The ignitiion switch does not need to be on for the stereo to work.  However, when I'm listening to bluetooth while the motor is running, the bluetooth will disconnect when I turn the engine off.  I'm guessing it's because the power was briefly turned off to the head unit.  

So how can I make sure the power to the stereo is not interrupted when turning the engine on or off?

The radio switch on the dash has four wires, 1) a white wire with tiny blue strip, 2) a orange wire at the top.  3) At the bottom it has a blue wire on one side, and a 4) black wire on the other that appears to go to all the switches.  I'm guessing the blue and the black are for the lights, and the orange is the power coming in, and the white with blue strip is what goes to the stereo?

 

 

 

Edited by vernonreeve

Share this post


Link to post
jbower

Main power to that switch is probably supplied threw the harness from the ignition switch so when you turn the key it breaks contact

Share this post


Link to post
MLA
1 hour ago, vernonreeve said:

I'm guessing it's because the power was briefly turned off to the head unit.  

Does the head unit shut off? 

Share this post


Link to post
David

So the HU comes On even with the ignition switch Off.

Is the BT built into the HU or an external module? If modular, the BT unit may be wired via a different path.

In any case, this is probably a case of the voltage dropping during the engine Off/On cycle for some reason. Try this. A heavy gauge battery-direct 12V supply and ground wire, like 12-gauge. All HU and BT constant and switched 12V direct to the battery. Then re-check. If successful, then interrupt the HU battery-direct switched 12V wire with a relay that is controlled off the factory dash switch. A relay will hold its function even with a voltage dip down to 8 volts.

    

Share this post


Link to post
vernonreeve

Yes, the HU comes on when I turn the switch on the dash on, even with the ignition switch off.  I tried wiring directly from the battery, to the switch (unplugged the orange wire and plugged in wire from battery instead).  But the head unit still turns off when I turn the key to on.  When I turn the key to the on position, the dash goes through it's buzzing sound as the gauges are activated, and somehow this turns off the head unit briefly.  The orange wire with black stripe that goes into the switch on the dash always has power.  The white wire with blue stripe gets power when I turn the dash switch on.  I'm guessing the white wire goes to the fuse panel, and then to the HU?  

What does BT stand for?

I'll have to wait until someone can help test the voltage so I can see if there is a voltage drop when I turn the ignition key on (without starting the motor).

The head unit has a plug with about 12 connectors that plugs into a matching plug from the wiring harness, so it's hard to tell which of those wires is the power to the head unit. 

Share this post


Link to post
David

Bluetooth.

Yes, you should measure the voltage to see if it is interrupted at any point through the key cycle.

Share this post


Link to post
DonT

I'm interested in the ultimate resolution.  I have a new to me '98 Sunsetter that has this same issue w/ BlueTooth.  running an Alpine head unit.  When the head unit does that power cycle thing, I drop the BlueTooth connection momentarily - which is not a big deal, but it then "pauses" the music I'm listening to, until I manually press play on my smartphone.

Share this post


Link to post

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...