2002 Jeep Liberty blowing a fuse constantly...help please!

[mrmatticus]

When ever i turn the key to the on position the ignition switch fuse, which is a 40A, blows instantly..i have ran a little trouble shooting that a chiltons book recommended, such as check for continuity and check for a good ground. Tried hooking up a light up probe to it and wiggling wires to find a short and was unsuccessful. looked thru alot of posts for help and couldnt really find anything....any help would be appreciated.

 

[TerryMason]

First off, welcome to Jeepz.com.

Do you have any aftermarket stuff like an amp or alarm? If so I'd go over that wiring.

Just a wild guess, but try replacing the fuse and adjusting the tilt steering (either all the way up or down) to see if it's a bare wire in the steering column.

 

[SteelHeadz]

X2, a 40 amp. fuse blowing is a hard short and may cause an electrical fire if not isolated. Another area to check is the wiring to the starter solenoid igintion signal.

 

[Glamissand1]

Question, does it blow in acc position? If not its going to be between key and engine. Pull off all wire loom, i know it sucks but if this continues more systems will fail due to rampant voltage. Look for a black sot mark or misshapen wires. Corners are a good place to start.