I have checked the wiring from the pdc to the ecm and havent found any shorts to ground has anyone had this problem...Any places to look for a issue... thanks tim

 

Check the wiring to the O2 sensor, if the O2 heater circuit shorts out it will blow that fuse.

 

is that the one in the pdc box

 

i changed the fuse 3 times drove it for a week . went to get lunch 1 day it blew 4 times in 10 minutes . and was fine the 35 minute drive home and hasent blown again yet .. just checked the o2sensor wiring no problems found.any thing else to check????

 

yes it is ...

 

does your year have two o2s or one

 

 

rear o2 sensor wiring most likely rubbing on metal

 

no pic

 

I only see one o2 sensor
...I got tired of blowing the big maxi fuses made a fused jumper and using the atc 30 amp fuses till I find the issue.. The dealer ships arround here are not much help ... When I worked at a dealer I would help anyone with wiring diagrams ... These days people have changed..

 

Only one O2 for 1994. Unplug the O2 and see if the fuse blows, it could be shorted internally.

 

https://www.cherokeeforum.com/f2/mechanic-needed-84935/

 

list two ????http://www.jeep4x4center.com/product...umber=56041056......http://www.jeep4x4center.com/product...umber=56028301

 

but if it shorts out the check engine light should come on??? and blows fuses all the time ... semed like when the problem started it only blew the fuse when cranking the engine... We were on the way back from the hospital after having a kidney stone blasted... I was in no shape to troubleshoot it on the side of the road had to have it towed home... ughhh

 

the same fuse power the autoshut down relay and kills thre motor