I’m rebuilding my yj (engine), and I’m in the process of wiring up the Holley sniper. Cranked it just to make sure all the original wiring was hooked up right. The problem I’m having right now though is when the key’s left on accessory, a red (maybe pink?) with a green stripe wire gets REALLY hot. It’s in the harness up against the fire wall and says ‘DO NOT CUT OR SPLICE’ but I figured I’d ask on here before I start digging into spaghetti haha. I’m just wondering what it goes to and why it’s getting so hot. Thanks
The red wire with a green stripe you mentioned could be a power wire related to a critical function, possibly the ignition system or fuel system. If it’s getting really hot, it could indicate a short circuit or that the circuit is drawing more current than it should, which can lead to wiring damage or even a fire risk.
Since the wire has a warning not to cut or splice it, it's likely part of an important system. Here's what you can do:
Look for a service manual or a wiring diagram specific to your YJ. This can help you identify what that wire connects to and determine if it's connected to something that's malfunctioning.
Before digging deeper, make sure all connections are secure and that there are no visible signs of damage, fraying, or corrosion.
If you're comfortable, use a multimeter to check the voltage and current flowing through that wire while the key is in the accessory position. This might help you understand if the wire is overloaded.
If you can isolate where that wire leads, try to check for any components that could be faulty or drawing excess power.
If you’re not sure or if the wire shows signs of major overheating, it might be best to consult with a professional mechanic or electrician familiar with YJs to avoid any further issues.
Good luck with your rebuild!