Ignition Wiring Harness Gets Hot??? (Yellow Wires) - MustangForums.com


Go Back   MustangForums.com > Ford Mustang Tech > 5.0L (1979-1995) Mustang
Sign in using an external account
Register Forgot Password?
Search


5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Ignition Wiring Harness Gets Hot??? (Yellow Wires)

Reply
 
 
 
 
Thread Tools Search this Thread
Old 08-02-2010, 07:27 PM   #1
88GTBLKBTY
 
88GTBLKBTY's Avatar
 
Join Date: Oct 2008
Vehicle: 88,Ford,Mustang GT
Location: fl
Posts: 12
Default Ignition Wiring Harness Gets Hot??? (Yellow Wires)

Hello,

I have a 1988 Mustang GT 5.0L, It's been converted from Speed density to MAF and has a MSD 6AL Box and upgraded to a 130amp alternator from a newer GEN.

Before the upgrades I had this problem and continue to have this problem after the upgrades. The ignition switch has been getting HOT and falls apart. I have replaced the ignition switch twice and continue with the same problem. This time around I have replaced the ignition switch and the starter solenoid that is mounted on the fender and I continue to have the same problem. I have noticed that the two yellow wires that are on ignition switch harness are the ones that are getting hot and the plug has started to melt. Does anyone have any sugestions as to what should be my next step?

Thanks Again
__________________
1988 Ford Mustang GT, bored 30 over 10/10 grind on crank, Maf Conversition, 24lb inj., MSD 6AL. Edelbrock RPM Performer Upper and Lower.
__________________
1988 Ford Mustang GT, bored 30 over 10/10 grind on crank, Maf Conversition, 24lb inj., MSD 6AL. Edelbrock RPM Performer Upper and Lower.

Last edited by 88GTBLKBTY; 08-02-2010 at 08:11 PM.
88GTBLKBTY is offline   Reply With Quote
Old 08-03-2010, 01:35 PM   #2
Turbo4banger
 
Join Date: Jul 2010
Vehicle: 1989, Ford, Mustang
Location: Texas
Posts: 29
Default

The 2 yellow wires on your ignition switch are 12v constant power... Have you measured voltage there to see if you getting the right voltage? I am not sure of the amperage though...I am wondering if you getting a spike or arc from somewhere causing the melting problem.
__________________

Chris L.
1988 Ford Mustang GT 5.0 Vert
1989 Ford Mustang LX 2.3L Turbo
2007 Ford Edge
2000 Ford F-150 (DD)
351w (slow build in progress)

Quote:
Originally Posted by thedrod View Post
Does the V6 mustang have a different engine than the V8?
Turbo4banger is offline   Reply With Quote
Old 08-03-2010, 02:58 PM   #3
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Vehicle: 85 mustang
Location: West Virginia
Posts: 30,508
Default

^^^voltage doesn't cause heating of wires, it is current draw/amperage or excessive current draw and or high resistance in wiring/connections that causes such............anyway, you need to make sure the connection there is good and tight and those 2 wires that get hot that the crimp connection is tight, often it is a problem in the connector/ across the pin connection, if the connector and or pins in the connector show any signs of melting, overheating and or blueing of the metal pins, = replace the connector and check the ground connection for the ignition switch, can't remmeber if it has such but looking at a diagram, you should be able to determine such if it has such , trace it and see where the ground leads to, faulty grounds will cause high resistance and up the current draw, thus overheating a circuit
__________________

Quote:
Originally Posted by EUTARD View Post
Suggest having a conversation with the highly INEXPERIENCED clowns....D.R the Dork, THE BarnyYard smells like......again and finally staring the highly intelligent and I must say skilled Eutard! UH where did de' go George
mjr46 is offline   Reply With Quote
Old 08-04-2010, 05:23 PM   #4
88GTBLKBTY
 
88GTBLKBTY's Avatar
 
Join Date: Oct 2008
Vehicle: 88,Ford,Mustang GT
Location: fl
Posts: 12
Default

Thanks Guys!!! I'll check the items that you guys have mentioned and I'll update after checking!!!
__________________
1988 Ford Mustang GT, bored 30 over 10/10 grind on crank, Maf Conversition, 24lb inj., MSD 6AL. Edelbrock RPM Performer Upper and Lower.
88GTBLKBTY is offline   Reply With Quote

 
 
 
Reply

Tags
1989, 23l, 6al, 88, ford, gt, harness, hot, ignition, melted, msd, mustang, starter, switch, wire, wires, wiring

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
random stalling issue SCCAGT 2005 - 2014 Mustangs 2 08-03-2015 01:03 PM
2004 Cobra Engine kweb288 Parts For Sale 0 07-29-2015 09:09 PM
Free to good home transporter1414 Trades & Freebies 0 07-29-2015 07:30 PM
Charging system issues pbp1114 5.0L General Discussion 3 07-28-2015 06:48 AM
Charging system issues pbp1114 5.0L (1979-1995) Mustang 1 07-27-2015 07:54 AM

 
Advertising
Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 07:59 AM.>

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup