Question about Garmin GPS 48 GPS Receiver

1 Answer

Garmin GPS 45

The GPS unit i have turns its self off after 5-10 mins and will not pick up any satellites.what would cause this?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 113 Answers
Re: Garmin GPS 45

It is probably one of the following:
1)Old Software
In 1999 the GPS satellites were reset and the new almanac data had to be loaded into the GPS 45 for it to continue to work. It was not uncommon for that model to quicly kill a set of batteries when it is having difficulty acquiring, which would cause it to shut down in order to save the batteries for its internal memory.

I just did a quick search of the Garmin website and it appears they no longer support that model. If you go to their support page and send a request for a software update they can probably e mail it to you. The update is free but to down load it, you need a PC interface cable (RS232 serial port connector) Part Number: 010-10141-00 Suggested Retail Price: $ 38.09.

2)Bad antenna
To rule this one out, borrow an antenna from another Garmin 45 or Garmin 48, or plug the unit into an external antenna and see if the unit still shuts down. The drawback to this method is that you can buy a new GPS that is superior to the one you have for about the same price as an external antenna.

3)Bad batteries
If your batteries are low, the unit will automatically shut off to protect its internal memory. I tried a lot of different batteries in my 45 and I found that Eveready alkaline batteries worked best. Rechargeable nicad batteries don't work very well because they fool the battery meter. Newer models have a setting to specify that you are using rechargeable batteries.

Ultimately the best advice I can give you is buy a new GPS. For less than $150 you can buy a new model that is more accurate, more reliable, stores more waypoints, has a better display, is easier to use, and gives you more valuable information.

Please rate this information as helpful.

Posted on Jan 24, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

My garmin GPS 12 will not pick up and lock on the satilites

Go to the Garmin website and download up to date software for your unit. A new satellite launched in '08 caused some problems, and the update fixes this.
Please come back and let us know if this fixes it.

Dec 20, 2009 | Garmin GPS 12 GPS Receiver

1 Answer

Garmin Nuvi 1300 couldn't reach satellite!


Dec 12, 2009 | Garmin nuvi 1300 Car GPS Receiver

1 Answer

Cannot acquire satellites and freezes

use the web-updater at garmin
or update the firmware at garmin,
turn WAAS on

turn GPS signal off
go outside after the update
turn GPS signal back on ( takes upto 15 mins to locate satelites )

should be good


Apr 21, 2009 | Garmin StreetPilot C330 GPS Receiver

1 Answer

Battery replacement now ca't find satellite Garmin c320

I had the same issue with the only difference that I haven't replaced the battery yet. When my unit can't locate or acquire satellites I change between GPS and WAAS mode. Within 45 seconds my unit successfully locates satellite. After some time if I disconnect unit I might have to switch it back to GPS and so on, and so on, and so on. It worked for me for past 3 months... Hope it will help you...

Nov 12, 2008 | Garmin Nuvi 360 Bilingual GPS Navigator...

1 Answer

Garmin Etrex Legend crashes after about 3 min

Update your unit software for free via the website. This is caused by a new satellite launched in 2008. The update fixes this problem.

Sep 29, 2008 | Garmin Nuvi 350 Car GPS Receiver

1 Answer

I have a Nuvi 200w that I received last December as a gift. This unit takes forever to aquire a satellite. The "DIFFICULY AQUIRING SATELLITES" message comes on 90% of the times I try to use it....

While under warranty.... yes.... Make sure it's been registered on their site before calling them and requesting an RMA number.

Good luck!

- Jim

Sep 17, 2008 | Garmin GPS Devices

1 Answer


You have a problem with your internal antenna. You can easly reslove this by hooking up an external antenna, and watch it go from 20 to two mins.

Feb 09, 2008 | Garmin StreetPilot c340 GPS Receiver

2 Answers

Can't get satellite fix

Keep in mind that GPS uses "Line Of Sight" for success.... in other words, the unit satellite antenna needs to pick up 3-6 GPS sats in ourder to determine one's lat/long position. Make sure the antenna is clearly visable to the sky.

If this is not the issue... Warranty replacement may be the only option where you bought it.

Feb 07, 2008 | Garmin Nuvi 660 GPS Receiver

3 Answers

Aquiring satellites

Are you outside with a clear view of the sky? It should find satellites once the unit is turned on. Does it say "Looking for satellites" or "Acquiring satellites"?

If it is "looking for satellites" then it means that the unit have lost all data (time, date, location). If it is "acquiring satellites" then it have date and time, but not location.

Looking for satellites require a longer setup time (could be as much as 15 minutes). Acquiring satellites is much faster (not more than 2 minutes).

Date and time is updated from satellites once the unit gets a satellite lock.

Jan 31, 2008 | Garmin StreetPilot C330 GPS Receiver

3 Answers

My Garmin has stopped finding destinations - just says "Searching for Satellite)+

I had the same problem with my Nuvi 310. Found a solution in here that works. Here's a copy of the advice.....note you will need to get in the car and set it for a destination and go. 5-10 mins later the Garmin Nuvi will lose the satellites, but don't adjust it it, leave it on and keep going. Eventually after about an hour it will right itself, pick up the satellites and evrything will be back to normal.

Here's the advice:


Rank: Apprentice
Rating: 81%, 49 votes

I experienced the same problem about acquiring satellite signal even when it's a clear sunny day. After 30 mintues, it was still searching!
The unit appeared to have "stuck" in this acquiring mode. The following worked for me:
1) open the GPS antenna
2) press the bottom left screen while holding the power button to turn the unit on
3) enter maintenace mode
4) select diagnostics
5) clear error report, do NOT clear any user data
6) restart unit the usual way

My GPS 350 was able to acquire satellite signal in less than 1 minute after the above steps were taken.

Dec 05, 2007 | Garmin nuvi 350 GPS Receiver

Not finding what you are looking for?
Garmin GPS 48 GPS Receiver Logo

1,021 people viewed this question

Ask a Question

Usually answered in minutes!

Top Garmin GPS Devices Experts

Tom Chichester

Level 3 Expert

22331 Answers

Jonathon summesfield

Level 2 Expert

284 Answers

Bill Gilhooly
Bill Gilhooly

Level 2 Expert

94 Answers

Are you a Garmin GPS Device Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides