No Start in cold weather - corrosion on a wire -
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Go Back > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > No Start in cold weather - corrosion on a wire

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Unread 07-04-2010, 12:50 PM   #1
Registered User
1990 YJ Wrangler 
Join Date: Jul 2008
Location: , New York
Posts: 151
No Start in cold weather - corrosion on a wire

My Jeep hasn't been starting in cold(ish) weather. I looked through the Hard or No Start/Long Crank in the Cold thread. Got to the ECU test, pulled the wire harness off and took the cover off.

On the third wire, which is the main power from the battery, is massively corroded. I've been slowly cleaning away the corrosion to see the wire. It's pretty bad. Some wires inside the casing have broken or are about to break.

This is RIGHT at the end of the wire, where it goes into the plug. How would I go about fixing/cleaning this? It looks like the corrosion goes inside the plug as well. (There is also corrosion inside the terminals, but I've found a way to clean those.) Do those wires just pull right out? Or should I not do that? Do I have to get a whole new plug and disconnect/reconnect 60 wires, just for one bad wire?

1990 Jeep YJ: Chevy 350, Auto Trans., Rear Axle ARB Air Locker, 4" Lift, 35"x12.5"-15 BF Goodrich All Terrain T/A tires
Other Jeeps: 1998 Grand Cherokee 5.9 Limited; 2002 Grand Cherokee Overland 4.7L
jeepkween is offline   Reply With Quote Quick reply to this message

ecu , wires , wiring harness

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