Fuse keeps blowing (Electrical short) - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old January 28th, 2010, 06:36 PM
redrockrover's Avatar
redrockrover
Status: Offline
Russell Phillips
1994 Defender 90
Member
 
Join Date: Feb 2004
Location: South Jordan, Utah
Posts: 81
Fuse keeps blowing (Electrical short)

I need some help on an electrical short. I have a 94 D-90 and the fuse number 5 (10-amp) under the dash that controls the temp gage, gas gage and blinkers keeps on blowing. I replaced it with another 10-amp fuse and it will blow but not right away. It will usually blow with in five mins of driving it. I put a 15-amp fuse in to get me home and it blew after about 10 to 15 mins of driving. I really have not looked any closer. Can some one point me in the right direction to start looking for the short? I am not the best when it comes to looking for shorts.

Thanks,

Russ
__________________
Russ

'94 AA Yellow
# 891
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old January 29th, 2010, 09:54 AM
Gren_T's Avatar
Gren_T
Status: Offline
Gren Thomas
1985 90 300tdi auto
Member
 
Join Date: Feb 2005
Location: bridgend, wales , UK
Posts: 413
Hi Russ as the fuse does not blow straight away its not a dead short, the most common cause of shorts on the instrument line is one of the earth tags on the back of the instuments touching a live.

remove the instument cluster(its easier with the steering wheel off ) and make sure all earth connections are tight and not close to the live wires, while there check the condition of the wires for any hardening, cracking or discolouraition of the insulation.

I am slacking in work at mo and dont have a wiring diagram to hand but try to find if there has been additions to the wiring from this fuse.

BTW . never uprate a fuse it may take longer to blow but in that time your wiring may get hot enough to melt.!

regards

Gren
Reply With Quote
  #3  
Old April 11th, 2010, 08:54 PM
Manimal's Avatar
Manimal
Status: Offline
Carl Jonsson
1995 NAS D90 #219
Site Team
 
Join Date: Sep 2008
Location: Portland, OR
Posts: 3,236
Bizarre.

The exact same thing started happening to me today. Fuse #5 (signal, brake lights, fuel gauge etc) started shorting. I replaced the fuse but it kept popping. Is this really due wires touching in the dash?

I partially removed a trailer break system a week ago. I have yet to trace & remove some wires back to the battery and I assume that they also interconnect with the signal/break wires as well at some point? I am not clear on how these are wired. I immediately thought that it was my partial removal of the trailer break system that caused the short. Is this not the case? Russel, did you confirm that it was an earth touching a live wire? If it is the trailer break system removal causing it I am surprised that it didn't start shorting until about a week later. It's been fine all week.

I know next to nothing about electrical issues so any suggestions are greatly appreciated.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old April 11th, 2010, 10:03 PM
Rugbier's Avatar
Rugbier
Status: Offline
Gustavo
110 Tdi - 110 N/A - D3 HSE - RRS SC
Member
 
Join Date: Jul 2008
Location: Peoples Republic of Marylandistan
Posts: 5,884
Registry
last friday I finally took Shrek back home after the reno, and before I made it out of the bay, the rear wires ( turn signal were crossed.

Not that is your problem, but take the signal out ( most of those rust and they could be rubbing + with -

Specially you Carl if you removed the trailer wiring, maybe something got molested

GL
__________________
NO SIGNATURE
Reply With Quote
  #5  
Old April 11th, 2010, 11:46 PM
Manimal's Avatar
Manimal
Status: Offline
Carl Jonsson
1995 NAS D90 #219
Site Team
 
Join Date: Sep 2008
Location: Portland, OR
Posts: 3,236
Take them out of where?
Reply With Quote
  #6  
Old April 12th, 2010, 09:24 AM
Manimal's Avatar
Manimal
Status: Offline
Carl Jonsson
1995 NAS D90 #219
Site Team
 
Join Date: Sep 2008
Location: Portland, OR
Posts: 3,236
How is the tow harness wired? Does it at some point hook up with signal/break wiring?

I also experienced some intermittent failure of the right turn signal (rear probably) the week before I started removing the tow harness. Could this be related?
Reply With Quote
  #7  
Old April 15th, 2010, 01:30 AM
Manimal's Avatar
Manimal
Status: Offline
Carl Jonsson
1995 NAS D90 #219
Site Team
 
Join Date: Sep 2008
Location: Portland, OR
Posts: 3,236
Problem fixed!

Apparently a tow harness with plugs removed does not play nice with the rest of the electrical system. I removed the rest of it and now it's all back to normal.
Reply With Quote
  #8  
Old April 19th, 2010, 11:45 AM
defeyago's Avatar
defeyago
Status: Offline
Santiago
96 Defender 110 VGTdi SW County
Member
 
Join Date: Sep 2007
Location: Buenos Aires, Argentina
Posts: 228
Registry
It happened to my that I had same shortage problems with bare wires touching metal from the harness that goes inside the chassis to the rear. You can make a test of unplugging those wires from the main harness. Plugs are 2 or 3 and are located below the heater matrix against the firewall. If unplugging those, and the problem is not in the back, then its inside the chassis. In this post (in spanish) are pictures of what I`ve found inside mine. I fixed everything up an put all harness inside a corrugated tubing and then back inside the chassis so it will never again a wire will rub against metal.

http://www.landroverclub.com.ar/viewtopic.php?t=100120

Hope it helps.
__________________
SANTIAGO
96 Defender 110 VGTdi SW County
97 Defender 110 Tdi SW
04 Freelander Td4 5 dr.
97 Alfa Romeo 146 TD (Sold)
95 Volvo 850 GLT Estate
94 Discovery Tdi (Webasto equipped)
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
electrical, wing

Thread Tools

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 Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel injection system Maxi fuse blowing ? TND90 Defender Technical Discussions 4 August 24th, 2009 12:32 PM
Fuel Pump Fuse Blows all the Time now! thug1313 Defender Technical Discussions 9 March 2nd, 2006 07:55 PM
Repeatedly blowing undehood 30A fuse Hans Defender Technical Discussions 1 September 6th, 2005 04:24 PM
Electrical short with my radio ? paulb Defender Technical Discussions 4 August 11th, 2004 12:25 PM
Blowing wiper/speedo fuse like crazy....help! P1CR Defender Technical Discussions 4 March 11th, 2004 03:23 PM


All times are GMT -5. The time now is 05:50 AM.


Copyright