Can I drive with a melted diagnostic port wire?
Accidentally short-circuiting the diagnostic port ground cable can melt the wire insulation and leave exposed copper. Whether it is safe to drive depends on how extensive the short was and what else the melted harness connects to, but driving with exposed or damaged wiring risks further electrical shorts before a replacement harness can be installed.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Wrapping the bare melted wire in electrical tape and monitoring for smoke or further melting while idling before attempting a short drive.
- 2adding a new spade terminal
- 3using a temporary jumper wire
- 4replacing the starter or solenoid
- 5Fixing the wiring quickly to restore temporary AC functionality without an additional disconnect
- 6Buying a replacement jumper harness
- 7Soldering and heat shrinking the wire back together
- 8Taking the vehicle to a shop with the skills to fix it
- 9Cutting back the damaged portion of the wire and reconnecting it to the unit
- 10Wrapping wires together from an extension cord and the desk
- 11Having a professional take off the light assembly and replace the wires properly
- 12Splicing in new wires
- 13Using solder-seal heat shrink tubes
- 14Wrapping tightly with gaffer tape
- 15Replacing the connector pigtail
- 16Replacing the entire wiring harness
- 17Realizing the pins/connectors are still lodged in the dosing unit and trying to reinsert the wires
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“Opened up the hood to find that #5's wires have been chewed through, along with another set just above that.”source ↗
“Is this something a non-mechanic can fix? I've read where other posts talk about butting wires up and shrink wrapping, but I've never had this issue before and if someone could ELI5 or point me to a good guide, I would be extremely grateful.”source ↗
“I'm trying my best to keep cost down by doing it myself, I have a different, newer car that came down with an engine code a week after this car and how both are not drivable.”source ↗
“My 95 diagnostic port ground cable melted because I accidentally connected another cable to it I think when trying to get check engine codes lol.”source ↗
“Would it be safe to say im good driving it again for now until I can save up some money to get a new harness and replace it?”source ↗
“I tried searching for the diagram and idk if diagnostic port is called something else but I had no idea what I was looking at or if it even had it tbh 😭”source ↗
“it seems like I broke the S-Terminal?”source ↗
“What is the exposed copper wire? Is the fix only to add a new spade terminal?”source ↗
“So I accidentally cut a wire in the boot of my front drivers door harness , turns out it goes to my door impact sensor. Do I 1. Cut the loss and buy the $250 jumper harness or 2. Solder it and heat shrink it back together”source ↗
“I’m scared of the air bag going off”source ↗
“when I took the door covering off to do the hinges I stripped these 4 wires.”source ↗
“I’ve never messed with appliances and don’t see how to re insert the wires”source ↗
“My a/c unit stopped working and I presumed it was going to be the capacitor, I was wrong… When I pulled the panel off outside I noticed the electrical feed , specifically the hot wire was black and charred looking.”source ↗
“the cable connected to the light bulb was cut off somehow and i js wanna see if I can get that fixed somehow.”source ↗
“somone js cut an ext cord short and wrapped the wires from both the ext cord and the desk together, but that just doesn't seem safe lol.”source ↗
“Went to turn the unit on. Nothing.”source ↗
“Came back up to the attic bumped the line again because I knew it was the only thing I had touched and the junction box blew up.”source ↗
“I open it up to see a missing wire nut obviously melted to oblivion at this point”source ↗
“Just want to know if this would be the correct route without adding an additional disconnect.”source ↗
Where this came up
People with this problem also raised
- 2Forgot how to wire a part after taking it off
- 3How to get twists out of a coiled cable
- 4How to fix car door electrical failure without going to a shop
- 3How to get broken ignition coil pieces out of the spark plug tube
- 3Is a melted electrical socket safe to leave until morning?
- 2Damaged insulation on new AC refrigerant lines