Notices
4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

PCM relay keeps blowing

Old 11-24-2018, 07:38 PM
  #1  
TraceP23
Thread Starter
 
Join Date: Nov 2018
Location: Missouri
Posts: 1
Default PCM relay keeps blowing

I was driving down the road and my car suddenly dies and so I pull over and I notice my theft light is blinking on and off and I try rolling it over and it acts like it wants to start but it doesn’t and so I look on a few YouTube videos and I go to look under the hood and pop the fuse box and start pulling fuses and I see that my pcm fuse is burnt out and so I go to put another fuse in and it blows as well and it keeps blowing each fuse I put back in it. I drive a 1997 Mustang GT
TraceP23 is offline  
Old 11-25-2018, 02:20 PM
  #2  
08'MustangDude
5th Gear Member
 
Join Date: Jan 2018
Location: Pennsylvania
Posts: 2,263
Default

Your title says the RELAY keeps blowing, then your detail says FUSE...

Check the the noise suppressor on the back of the driver side head. If it is shorted,
it will keep blowing the ECM fuse.

Shorting fuel injectors could cause it, or aftermarket injectors that want more current.

Check for a shorted wire to the data link connector (OBD port).

Shorted O2 Sensors...

It is a short, for sure, so you have to find it. Most of the time, it is the ECU, internal.
You'd need tons of fuses to test circuits that go to the ECU harness, to unplug them
one at a time to test...
08'MustangDude is offline  
Old 11-25-2018, 09:37 PM
  #3  
JimC
Moderator
 
JimC's Avatar
 
Join Date: May 2006
Location: North Carolina
Posts: 7,326
Default

Are you sure it is a FORUM issue?

Forum Issues and Feedback Discuss any issues you are having with using Mustang Forums here.
Please look at the section that you are posting in. This is not the section for your car, as the title and explanation at the top say, it is for problems with using the Forum.
JimC is online now  
Old 01-06-2019, 08:48 PM
  #4  
99GTvert
is my username.
 
99GTvert's Avatar
 
Join Date: May 2006
Location: Earth
Posts: 13,761
Default

Two months later, I move tech....****
99GTvert is online now  
Old 01-06-2019, 09:04 PM
  #5  
Urambo Tauro
3rd Gear Member
 
Urambo Tauro's Avatar
 
Join Date: Aug 2015
Location: SE Michigan
Posts: 913
Default

Definitely sounds like a short. Hope you managed to find the source by now.
Urambo Tauro is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Tanner05
Trades & Freebies
1
03-11-2014 06:28 PM
1MEANSNAKE
4.0L V6 Technical Discussions
13
05-22-2013 06:35 AM
VistaGT
2005-2014 Mustangs
39
01-08-2011 11:49 AM
QCK01GT
4.6L General Discussion
2
03-15-2008 05:42 PM


Thread Tools
Search this Thread
Quick Reply: PCM relay keeps blowing


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.