Need some help on head unit installation

[Marc9118]

Hello.

This is my first thread and first car audio installation. I have a 2003 chevolet cavalier. Unfortunately when I bought the car the stock wire harness was already cut. After doing a couple hours of research online I finally came up with the wiring diagram for the stock harness. After hooking up the wires my head unit will only now power on when I hit a certain button. After about 10 seconds or so it just shuts off. I can turn it back on again but once again after 10 seconds it just shuts off. I can put a cd into it and it powers on but after 10 seconds it just powers off. Any suggestions would be greatful. Thanks

It's a JVC head unit by the way.

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[funkyab 10+ year member]

thats weird. Sounds like your power wire is not giving a constantly on voltage.

Take a dmm and test your voltage, and make sure it stays on for more than 10 seconds. use the dmm to find your constant power wire, your switched power wire and your ground, also your remote wire.

 

[Marc9118]

Would the remote wires and the constant wires have something to do with it? I left those wires disconnected because they didn't match up with the wire diagram I was using. I couldn't find anymore info than what I already found on the wires.

 

[funkyab 10+ year member]

remote wire is wire off your head unit that you will use to connect your power antenna (if you have one) or for an amplifier. You need to have your constant and switched power both connected. I personally connect both of them together. In that case, you need to make sure to manually turn off your head unit when you turn the car off, where as when constant and switched are hooked up,, head unit turns off when car is turned off.

If you DONT have constant hooked up, most likely, every time you turn your car off,, you will loose all of your settings.

 

[Marc9118]

I also just read on the instruction manual that the ground should be fastened to a metallic or the car chassis. I have it connected to the ground off of the old stock wire. Would this be a problem? So basically I should connect the wire to the constant?

 

[funkyab 10+ year member]

connecting the ground to the factory ground wire is just fine. Make sure you have a good connection. And yes,, you need to have your constant power supply connected.

Good luck and keep us posted.

 

[Marc9118]

I have no idea of what i am doing here. I am just getting so agravated with this. I only can hit the display button on the head unit then after 10 seconds it just shuts off. Maybe you could give me a hand with the installation manual I am using. http://books.jvcservice.com/download/810630439/GET0246-002A.pdf

Also, here is what I am going by for my factory wiring.

http://www.autotoys.com/New_Tech/Wire_codes/GM_GMC_GEO_RADIO/gm_gmc_geo_radio.htm

 

[funkyab 10+ year member]

the link for the jvc manual will not open.. if you are still having trouble,, send it again or let me know and ill look for it.

Do you have a digital multi meter (dmm)? If so,, that will quickly help you indetify the troubles. If you dont have one,, surely a friend or neighbor will.. this should be an easy solution unless the head unit is damaged. Is it new?

 

[funkyab 10+ year member]

also,, whats your JVC model number?