Go Back  The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > Marine Electronics Forum
Reload this Page >

How many volts does it take to fry a GPS?

Notices
Marine Electronics Forum

How many volts does it take to fry a GPS?

Old 08-31-2017, 11:18 AM
  #1  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jun 2013
Location: Miami, FL
Posts: 2,043
Likes: 0
Received 329 Likes on 189 Posts
Default How many volts does it take to fry a GPS?

Specifically a Garmin 74cv. Mine went out on me, brand new only used a handful of times. The only thing I can guess it is would be the fact that the stator on my motor charges very well.
Old 08-31-2017, 11:47 AM
  #2  
Senior MemberCaptains Club Member
 
Join Date: Jan 2007
Location: Tampa Florida
Posts: 7,037
Received 3,291 Likes on 1,896 Posts
Default

your stator can charge very well but should not be making more than about 14 volts. if it were, you would most likely have problems with other electronics
Old 08-31-2017, 12:24 PM
  #3  
Senior MemberCaptains Club Member
 
Join Date: Jan 2005
Location:
Posts: 4,297
Received 309 Likes on 261 Posts
Default

It is very hard to raise a good batteries terminal voltage to unsafe levels for boat electronics, I doubt that happened.

Jim
Old 08-31-2017, 12:34 PM
  #4  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jun 2013
Location: Miami, FL
Posts: 2,043
Likes: 0
Received 329 Likes on 189 Posts
Default

It is a 2.4 Merc with a 16 amp charging system. 14 volts at idle and 16.5 at WOT. To me, the GPS should be able to handle this, especially because many people w/ the same setup have the same voltage readings as I do. I'm thinking I blew the internal fuse.
Old 08-31-2017, 12:43 PM
  #5  
Admirals Club Admiral's Club Member
 
Join Date: Nov 2008
Location: Somewhere in the middle of Michigan
Posts: 10,576
Likes: 0
Received 1,333 Likes on 714 Posts
Default

That unit is rated to operate on 10-18 volts. 16.5 volts should not damage it.
Old 08-31-2017, 12:45 PM
  #6  
Senior MemberCaptains Club Member
 
Join Date: Jan 2007
Location: Tampa Florida
Posts: 7,037
Received 3,291 Likes on 1,896 Posts
Default

your GPS just took a dump maybe moisture?
Old 08-31-2017, 01:15 PM
  #7  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jun 2013
Location: Miami, FL
Posts: 2,043
Likes: 0
Received 329 Likes on 189 Posts
Default

Moisture is probably my guess, but the GPS maybe only took a spray or two that day.

Basically I got to where I was going and as I am pulling into the house, it shut off. The 3 amp fuse in the fuse holder blew. It blew the next fuse I tried. The only way it wouldn't blow the fuse the second I installed it was if the GPS was unplugged. The second I tried plugging in the GPS, you heard the fuse pop. I tried it a few days later and it still never worked. I've isolated it to the unit thus far
Old 08-31-2017, 06:36 PM
  #8  
Senior Member
 
Join Date: May 2014
Posts: 2,078
Received 23 Likes on 16 Posts
Default

Call support. Time for a new one.
Old 09-01-2017, 10:58 PM
  #9  
Senior Member
 
Join Date: Jun 2010
Posts: 4,458
Likes: 0
Received 27 Likes on 20 Posts
Default

Unless a bad regulator/rectifier, unlikely an outboard problem.

Since the GPS constantly blows fuses, obviously a fault with unit itself, unless there is a short in wiring going to GPS itself...try a direct connection to battery...if still blows fuses, obviously an internal problem
with the unit, assuming correct amperage fuse is installed inline with unit...check manual for correct fuse, compare, then if still a problem, return for repair, assuming still under warranty...probably so since it's a fairly new GPS unit.
Old 09-02-2017, 04:48 AM
  #10  
Senior Member
 
Join Date: Oct 2010
Location: Pensacola Fl
Posts: 190
Likes: 0
Received 10 Likes on 9 Posts
Default

Listen to Karl in New York good advise.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.