Help identifying wire under hood

JoeTheCarGuy

JoeTheCarGuy

Member
Joined
Sep 15, 2017
Messages
91
Location
Alabama, United States
I was exploring underneath my hood (2004, 4.0, Auto) last night and I noticed a frayed wire bundle above my battery. I unplugged the two plugs to my ECM(?) and noticed that one wire had the insulation rubbed off. I need help identifying the wire and also some insight as to whether it may have caused any damage to any of the electronics. The damaged wire is white with a blue tracer, located in the center (white) plug loom. I found the cause and corrected that already. Thanks!
33941950-CC45-4EDB-A351-A90192CFEB11.jpegD5CDAE8D-FE5E-4CA3-8D78-1090698B93AB.jpeg
 
If it's just one wire there's probably no damage. Which plug is it of the 4, that'll help with hunting it down on the wireing diagram.

—
There must have been a time
when we could have said no.
 
  • Like
Reactions: JoeTheCarGuy
I'm not sure exactly which wire that is (you need to check the FSM to tell you for sure), but that shouldn't have caused any damage. Just put some electrical tape over it, clean it up, and you should be good to go without any worries.

If you don't have a FSM, download one here:
Jeep Wrangler TJ Factory Service Manuals (FSM) & Technical Documentation

That will have all the wiring diagrams in it.
 
  • Like
Reactions: 05 Blue Unlimited, JoeTheCarGuy and JeepNWilly
JoeTheCarGuy said:
I was exploring underneath my hood (2004, 4.0, Auto) last night and I noticed a frayed wire bundle above my battery. I unplugged the two plugs to my ECM(?) and noticed that one wire had the insulation rubbed off. I need help identifying the wire and also some insight as to whether it may have caused any damage to any of the electronics. The damaged wire is white with a blue tracer, located in the center (white) plug loom. I found the cause and corrected that already. Thanks!
View attachment 32511View attachment 32512
Click to expand...
Did it just look bad or was it causing some sort of issue(s)?
 
  • Like
Reactions: 05 Blue Unlimited
After rewrapping the bare wire:
A. CEL is no longer displayed on dash
B. Engine seems to run smoother
It appears to have been the B4 pin, fuel injector #1
Thanks guys for pointing me in the right direction.

5DA08C98-3AB2-4674-ADEF-E6F1F3C5B059.jpeg
 
  • Like
Reactions: KCsTJ
Top Bottom
Back