Help With Electrical Gremilins - Defender Source
Defender Source  

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


Reply
 
Thread Tools
  #1  
Old January 5th, 2006, 07:59 PM
mdmccallum's Avatar
mdmccallum
Status: Offline
Mike
'97 Defender 90 SW
Member
 
Join Date: Dec 2003
Location: Durango, Colo.
Posts: 425
Help With Electrical Gremilins

I did a search but the topic is sort of obscure and has only been touched upon. I have a few accesories like a stereo, 300 watt amp, XM sat, fog lights and then the stock electrical components. When I am using too many things at once ( like XM, stereo, amp, and either high beams or heater fan) my tachometer stops working. I just replaced the alternator when it quit and I have a (hold the criticizm) Optima yellow top battery. I seem to be drawing too much juice for the alternator when running too many accesories. One other thing, the XM radio is the one thing that really seems to do me in. When it isn't on then I don't think that I have any problems. So do I need a stronger alternator or do I have a short or bad connection through the XM radio mount?
Any help would be appreciated.
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old January 5th, 2006, 08:07 PM
javelinadave
Status: Offline
-
-
Member
 
Join Date: Sep 2003
Location: -
Posts: 5,394
XM should use 3 amps or less. Sounds like a bad connection or a bad power supply in the unit.
Reply With Quote
  #3  
Old January 5th, 2006, 09:18 PM
robisonservice
Status: Offline
John Robison
2008 Supercharged Range Rover
Member
 
Join Date: Nov 2005
Location: Amherst, MA, USA
Posts: 110
If the tach stops working it probably means the alternator is cutting out. Either the alternator is bad or you have wiring troubles - corrosion, bad grounds, etc.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old January 5th, 2006, 09:27 PM
Hans's Avatar
Hans
Status: Offline
Hans Haase
The D-90.com Lab Rat
Member
 
Join Date: Oct 2003
Location: Long Island, NY
Posts: 2,381
How is the XM wired in? Where is it drawing its power from? I have mine feeding from the same switched power as the radio and never had a problem.

Also, the stock tach kinda sucks. Mine was all over the place for a while after I changed my coolant gauge. The wiring and connectors are real sensitive to any changes and like to fail.

How is the connections on both sides of the battery cables?

-Hans
__________________
My oil line fix

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
My 100k stopped odometer fix

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Brace for impact, I'm in a "modifying mood". Massive thread count inbound.
Reply With Quote
  #5  
Old January 6th, 2006, 03:40 PM
ne4x4's Avatar
ne4x4
Status: Offline
Ian McCormack
1984 Landrover 90
Member
 
Join Date: Nov 2005
Location: Durham, UK
Posts: 98
check your main earth lead from the battery
Reply With Quote
  #6  
Old January 6th, 2006, 05:01 PM
mdmccallum's Avatar
mdmccallum
Status: Offline
Mike
'97 Defender 90 SW
Member
 
Join Date: Dec 2003
Location: Durango, Colo.
Posts: 425
Battery Terminals are good (clean), battery ground is solid (to the frame), XM is powered to the radio 15amp fuse. I have paid more attention to the problem which seems to be coming from the high beams. When I turn them on the tach immediately drops about 500rpm's or quits all together. I am starting to suspect the alternator. What do you guys think?

If it is the alt. then do I need a higher output one? 120 or 200 amp? or is the stock one sufficient?
Reply With Quote
  #7  
Old January 6th, 2006, 05:20 PM
ne4x4's Avatar
ne4x4
Status: Offline
Ian McCormack
1984 Landrover 90
Member
 
Join Date: Nov 2005
Location: Durham, UK
Posts: 98
Check the high beam circuit for a short or dodgy earth connection there has to be a short or similar to cause that sort of problem
Reply With Quote
  #8  
Old January 6th, 2006, 06:32 PM
mdmccallum's Avatar
mdmccallum
Status: Offline
Mike
'97 Defender 90 SW
Member
 
Join Date: Dec 2003
Location: Durango, Colo.
Posts: 425
I had another thought. Could my Hella H4 headlights be the problem? Could they be drawing too much juice?
Reply With Quote
  #9  
Old January 7th, 2006, 01:24 AM
Hans's Avatar
Hans
Status: Offline
Hans Haase
The D-90.com Lab Rat
Member
 
Join Date: Oct 2003
Location: Long Island, NY
Posts: 2,381
Which bulbs do you have in them? Very strong possibility, as the headlight system draws all the power from the switch. It's highly recommended that you use relays and run the power for the headlights back to an independant source, especially if you upped the wattage at all, or you risk melting the entire headlight switch over time.

-Hans
__________________
My oil line fix

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
My 100k stopped odometer fix

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Brace for impact, I'm in a "modifying mood". Massive thread count inbound.
Reply With Quote
Reply

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

Tags
electrical

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
Tdi electrical diagram artm Defender Technical Discussions 2 January 13th, 2006 08:52 PM
Electrical problem whistler110 Defender Technical Discussions 10 December 12th, 2004 12:25 PM
Electrical for beginners paulb Defender Technical Discussions 5 October 18th, 2004 01:58 PM
battery/ electrical issues steve_brooks Defender Technical Discussions 1 April 23rd, 2004 04:05 PM
on-going electrical problem... vesparover Defender Technical Discussions 3 October 23rd, 2003 11:13 AM


All times are GMT -5. The time now is 06:42 AM.


Copyright