Losing electrical power. - Subaru WRX Forum
 2Likes
  • 2 Post By arcticscythe
 
LinkBack Thread Tools Display Modes
post #1 of 7 Old 05-26-2014, 12:59 PM Thread Starter
WRXtuners Member
 
Bubba James's Avatar
 
Join Date: Jan 2014
Location: Tennessee
Posts: 108
Bubba James is an unknown
Losing electrical power.

Ok so I've been having this problem for a while now. 2003 WRX. Lights started dimming under heavy electric load. Then got worse. Abs light on and off. Now its cutting power completely, seemingly getting worse. Tach/speedo reset, trip tracker resetting, car acts like the ac conpressor is kicking on when turning the lights on. Replaced the alternator to no avail. Halp.
Bubba James is online now  
Sponsored Links
Advertisement
 
post #2 of 7 Old 05-26-2014, 02:02 PM
WRXtuners Member
 
Epictofer's Avatar
 
Join Date: Aug 2013
Location: North Carolina
Posts: 164
Epictofer is known to be trustworthy and helpful Epictofer is known to be trustworthy and helpful Epictofer is known to be trustworthy and helpful
Garage
Hows the battery testing? Is there any draw on the battery while the engine is off? When you turn the headlights on there is additional load on the alternator and it may adjust the engine idle to compensate for that, it may not. More testing is probably necessary.
Epictofer is offline  
post #3 of 7 Old 05-26-2014, 03:09 PM Thread Starter
WRXtuners Member
 
Bubba James's Avatar
 
Join Date: Jan 2014
Location: Tennessee
Posts: 108
Bubba James is an unknown
Battery tested fine. Cleaned the ground points at the fenders and firewall with a dremel wire wheel. The one on the firewall behind the intercooler was in bad shape from a previous leak blowing crap on it. Seems to be running fine right now. Left tge ground in the intake manifold alone. And the last is on the tranny, iifc. Will check that one eventually. Water caps on battery...could they cause this?
Bubba James is online now  
post #4 of 7 Old 05-26-2014, 03:37 PM
WRXtuners Member
 
Epictofer's Avatar
 
Join Date: Aug 2013
Location: North Carolina
Posts: 164
Epictofer is known to be trustworthy and helpful Epictofer is known to be trustworthy and helpful Epictofer is known to be trustworthy and helpful
Garage
No those batteries should be non serviceable, meaning you don't need to add water or anything to them. the poor ground could have been the issue, but without knowing what that specific ground wire goes to I couldn't tell ya.
Epictofer is offline  
post #5 of 7 Old 05-27-2014, 02:59 PM
WRXtuners Member
 
arcticscythe's Avatar
 
Join Date: Dec 2013
Location: California
Posts: 436
arcticscythe is known to be trustworthy and helpful arcticscythe is known to be trustworthy and helpful
Garage
Cleaning up the Ground points was a great idea, In alot of cases its poor grounds that cause electrical "ghosts" in the system.

You may want to look into replacement grounding straps, you said you had a leak that tore up one of your grounding points. then its probably a good idea to swap out that strap

Grounding straps are just pieces of braided steel or copper wire with heavy gauge insulation and an eyelet at the end. Ive seen some really pretty ones in the past (HKS Earth) and ive seen some pretty ugly DIY home depot jobs but they all do the same thing. Acheiving a stable ground is what allows the vehicle to function under DC load so if things arent quite right and your battery and alternator are OK then a set of grounding straps if probably a good bet.

When i was building high wattage sound systems engine bay grounding was something we always added just to be safe, They arent expensive but they can make a hell of a difference when your pushing higher loads.

Hope that helps
Nekronaut and Bubba James like this.

Jason
13 WRX Hatch - Cobb OTS Stage 1
arcticscythe is offline  
post #6 of 7 Old 05-28-2014, 09:04 AM Thread Starter
WRXtuners Member
 
Bubba James's Avatar
 
Join Date: Jan 2014
Location: Tennessee
Posts: 108
Bubba James is an unknown
Yeah, at this point, things are still running strong. Before, it had got to the point where I would have the power cut off from accelerating hard, hitting the brakes, using turn signals, radio, etc. After the grounding point reckoning, everything operates as it should. I've thought about a grounding kit or just doing it myself, but I honestly just don't feel like re-running the wires around the engine bay.
Bubba James is online now  
post #7 of 7 Old 05-28-2014, 01:50 PM
WRXtuners Member
 
arcticscythe's Avatar
 
Join Date: Dec 2013
Location: California
Posts: 436
arcticscythe is known to be trustworthy and helpful arcticscythe is known to be trustworthy and helpful
Garage
Quote:
Originally Posted by Bubba James View Post
Yeah, at this point, things are still running strong. Before, it had got to the point where I would have the power cut off from accelerating hard, hitting the brakes, using turn signals, radio, etc. After the grounding point reckoning, everything operates as it should. I've thought about a grounding kit or just doing it myself, but I honestly just don't feel like re-running the wires around the engine bay.
If it makes any difference they are usually really short runs, Its an hour project if you have a can of breakfree and an electric screw-driver. Depending on how much engine bay dress up you already have you can usually get matching insulated 4 Gauge Cables with nice terminating blocks on amazon for about $30 bucks.

Jason
13 WRX Hatch - Cobb OTS Stage 1
arcticscythe is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 Off
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On