relay for xm and gps

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audioman2007

Copper - Posts: 580

Joined: February 20, 2007

Location: United States

Posted: November 21, 2007 at 12:00 PM / IP Logged

Hello. I want to run my gps and my xm radio off a relay. I only want to have power to them when the car is on or in acc. I cant use the cig. outlet for them because my car's cig outlet has constant power. Right now Im running the xm off an interior fuse for something that only has power when car is running. Is there a way I can get power from something to throw the relay in order to get these 2 components to run?

KPierson

Platinum - Posts: 3,527

This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: November 21, 2007 at 2:38 PM / IP Logged

You can wire a relay up like this:

Pin 85 - Ignition source (or accessory source, if you have one)

Pin 86 - ground

Pin 30 - Fused 12VDC constant

Pin 87 - 12VDC output

You could most likey hook both devices directly to the ignition (or accessory) wire with no issues at all. Just make sure you fuse both wires appropriately. You really don't need a relay to power them.

Kevin Pierson

hotwaterwizard

Silver - Posts: 1,350

Joined: December 11, 2003

Location: California, United States

Posted: November 21, 2007 at 10:33 PM / IP Logged

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

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techman93

Silver - Posts: 591

Joined: October 28, 2006

Location: Pennsylvania, United States

Posted: November 21, 2007 at 10:55 PM / IP Logged

Make sure XM only gets voltage it requires and not 12V+. I think it is more like 5 V+. If you have to, run a voltage regulator to it. Radio Shack item number is 7805. It will cost about $1.60.

The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.

Do it right the first time... or I might have to fix it for ya

hotwaterwizard

Silver - Posts: 1,350

Joined: December 11, 2003

Location: California, United States

Posted: November 22, 2007 at 12:52 PM / IP Logged

The XM runs on 12v and they usually come with an Adaptor if needed 12v to 5v.

You would just hook the adaptor 12v input to the relay 12v output.

Just buy an extra Lighter Socket at the autoparts store, and add it into the 12v output of the relay..

Lets keep it simple so we don't confuse people.

John DeRosa (Hotwaterwizard)

Stockton California

When in doubt, try it out !

audioman2007

Copper - Posts: 580

Joined: February 20, 2007

Location: United States

Posted: November 27, 2007 at 8:26 PM / IP Logged

I just wired it into the relay i have running off my remote turn on wire. It works out perfectly for my xm since you need to have the radio on to listen to music anyways. This way my xm will turn on when my headunit turns on. So I will need to have my headunit turned on in order to get power to my gps. I can still use the gps with my headunit off since i have a 5 hour battery in it. Works for me.

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relay for xm and gps

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