Clarion HU shuts off when lights turn on

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beerstud136

Copper - Posts: 100

Joined: July 04, 2002

Location: Canada

Posted: March 16, 2003 at 10:55 PM / IP Logged

1987 volkswagon jetta, clarion dxz835mp... first thing that i found odd was the fact that this car only ran 1 more wire, the intire electrical system is switched Clarion HU shuts off when lights turn on -- posted image.

Clarion HU shuts off when lights turn on -- posted image.

but whatever i figured it out, install went fine and finished with out a problem, but then the girl tells me tonight that when she turns on her headlights her deck completely shuts off... a few things crossed my mind, but im still confussed, help!

esmith69

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Joined: November 26, 2002

Location: United States

Posted: March 17, 2003 at 9:03 AM / IP Logged

Does it do this only when the car is turned off? Might wanna try checking the +12v constant going to radio for voltage, with the lights on and then with them off. If the voltage drops way down when you turn the lights on then that's prolly why the head unit turns off--it's got one of those under-voltage protection circuits.

Does the radio come back on once the lights are turned off? And are there any fuses blown anywhere (radio fuse, vehicle fuse, etc.)

When you wired the head unit, did you connect any of its dimmer/illumination wires up to the vehicle?

beerstud136

Copper - Posts: 100

Joined: July 04, 2002

Location: Canada

Posted: March 17, 2003 at 2:31 PM / IP Logged

if she turns the lights off the hu comes back on, no fuses are blown anywhere and there were no dimmer/illumination wires hooked up, could this possibly be the problem, perhaps one of the illumination wires need to be hooked up to supply 12v+ when the lights are on?? i have no idea, first time ive ever touch a VW thanks

beerstud136

Copper - Posts: 100

Joined: July 04, 2002

Location: Canada

Posted: March 17, 2003 at 2:54 PM / IP Logged

ok forget what i just said

ill explain again,

this car has a constant 12v+ source, and NO switched 12v+ source, so even though i know its not right, i just wired the constant and acc wires from the head unit toghter with the cars constant, it still shuts off when the car is off and keeps its memory, which is wierd? but when she turns on the head lights, the deck shuts off. whered the power go??? im so lost here, everything is wired properly, only there i did not wire the illumiation wire, and there is no dimmer in this car

https://www.the12volt.com/installbay/detail.asp?info=alarm&year=1985-92&make=Volkswagen&model=Jetta&ID=19113&type=Stereo

lagatbezan

Copper - Posts: 117

Joined: February 16, 2003

Location: United States

Posted: March 17, 2003 at 10:34 PM / IP Logged

try changeing your ground for the radio!! also, get a test light and test to see if you are getting power when the lights come on,same for the ground. my guess is that the ground is connected to the lights. don't ask me how, but i have ran into the same problem, just not in a vw. let me know what happens.

Ryan.

beerstud136

Copper - Posts: 100

Joined: July 04, 2002

Location: Canada

Posted: March 18, 2003 at 10:58 AM / IP Logged

logical i guess, makes sense. just try running a new ground? see, this is why i have imports. why can't they just wire thier vehicles like a chevy, it's so simple!

thepencil

Gold - Posts: 1,526

Joined: December 16, 2002

Location: Canada

Posted: March 18, 2003 at 1:09 PM / IP Logged

beerstud136,

I share the same opion as esmith69. From experience I know the radio unit shut off when there is a drop in votage. If that is the case with the head light going on and the radio going off, save yourself the headach. Run a seperate power wire from the battery to the radio and fuse it. You can run the power wire through the firewall on the driver side middle left coner. It's pretty easy to get the power wire through this VW, but do the test for power and ground first. This takes two minute, running the power through takes ten minute.

Be careful whose advice you buy, but be patient with those who supply it. Clarion HU shuts off when lights turn on -- posted image.

beerstud136

Copper - Posts: 100

Joined: July 04, 2002

Location: Canada

Posted: March 18, 2003 at 2:43 PM / IP Logged

thanks guys

beerstud136

Copper - Posts: 100

Joined: July 04, 2002

Location: Canada

Posted: March 18, 2003 at 2:44 PM / IP Logged

but the same is only 1 wire power supply, there is no constant power it's all switched, if i run a direct line form the battery, how is the deck ever going to shut off?

thepencil

Gold - Posts: 1,526

Joined: December 16, 2002

Location: Canada

Posted: March 18, 2003 at 9:48 PM / IP Logged

No ignition at all, try a toggle switched so you that can turn it off or on.

Be careful whose advice you buy, but be patient with those who supply it. Clarion HU shuts off when lights turn on -- posted image.

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