1996 Jeep Grand Cherokee...Blowing ASD fuse

hi jimmy.
see if this link helps you out.
Why does oxygen sensor fuse keep blowing on my 2004 jeep grand cherokee...

The ASD relay supply's battery power to that fuse . The wiring from the fuse to the O2 sensor has a short to ground somewhere . Look at the O2 sensor ,these wires sometime's get loose from body attachment point's an melt on exhaust manifold's or exhaust pipes .

Check the fuel filter,nozzles and clean the injector mouth

gee 1, last year of Cherokee is 2001, so you meant Grand right??????
gee2, wont start or stalls, no other symptoms????? just 1 DTC, no others using a real scan tool? that be first huh?
Geewise 3, what engine, wow, wrong car, no engine or country.?

the FSM covers this, and the ASD has 8 ways to trip off line'
UP TO 8 ways , just like old wonder bread had.

answering for 2004 GC, (i actually look it up in the real book)
not google butchered DTCs.
P means power train, 1 means factory codes.
a 3 coin toss lands...
2004 GC, vin N, 4.7L v8 automatic,


it reads. verbatim.
Trouble Code: P1389
No Auto Shutdown Relay Output Voltage To PCM
Number of Trips to Set Code: 1

• Catastrophicmonitor failure.

Trouble Code Conditions:
Engine cranking; and the PCM did not detect any voltage on the ASD Relay Output circuit to the PCM during the CCM test.
Possible Causes:

1. ASD relay connector is damaged, loose or shorted
2. ASD relay output circuit is open between the relay and PCM
3. ASD relay power circuit is open (test power from Fused B+)
4. ASD relay is damaged or has failed
5. PCM has failed (nah)

it means, to me.

• the relay is unplugged
• or fuse blown "fused B+" (a top reason, world wide)
• the relay is bad.

my buds ASD page,

http://www.fixkick.com/Jeeps/ASD.html

the wire harness to the ecm is shorting out some where

what fuse is blowing the radio?

I had similar problem with my suzuki. It turned out to be a short in my wiring under hood. I found the short finally after having to replace the main computer (the short finally fried that). But with new computer it ran fine for awhile then when it shorted out again started smoking at the short

Change the fuse for the correct size AMP.



More details about Power Center Distribution, check the Section 8W Wiring Diagrams

Good luck.

Try resetting the asd "auto shut down fuse had a similar problem the jeep would crank but did not get spark or gas also check your fuel pump? and the asd relay may be bad it will prevent the jeep from getting no spark and will not fire some jeeps have security problems

Yes I had the same problem. The wires that plug into the sensor at the catatytic converter were rubbing against the drive shaft untill they finally wore through causing the short against drive shaft. repaired wires and it fixed everything