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battery drain after new head unit


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keevel 
Member - Posts: 2
Member spacespace
Joined: December 02, 2008
Location: Iowa, United States
Posted: December 02, 2008 at 12:11 PM / IP Logged  
Greetings all:
I have installed a Pioneer DEH-P77DH in a '02 Suburban with OnStar. Since the install, there is an apparent drain on the battery w/o the ignition turned on (aux or run). Alternator output is normal (up to 30+ amps depending on battery voltage). Is there a way to check battery discharge when all is shut down? There was a relay included in the wiring harness but I don't see where the drain can be with everything off.
-keevelbattery drain after new head unit -- posted image.
"If you want an education, go to the library. If you want to get laid, go to college." -Frank Zappa
dwarren 
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Platinum - Nominee spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: December 03, 2004
Location: California, United States
Posted: December 03, 2008 at 1:09 AM / IP Logged  

Did you retain onstar? If so what interface did you use?

keevel 
Member - Posts: 2
Member spacespace
Joined: December 02, 2008
Location: Iowa, United States
Posted: December 03, 2008 at 12:39 PM / IP Logged  
Thanks for the reply. The owner wanted to retain on-star capability but he is not currently a subscriber. I used the PAC OS-1 interface. I sort of figure this has something to do with on-star in that every time the battery drains to nothing (< 9 volts), once a charged battery is applied, the 9 pin harness to the OS-1 has to be unplugged and reconnected before there is sound to the speakers.
"If you want an education, go to the library. If you want to get laid, go to college." -Frank Zappa

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