I always recalled the pump being noisy when the truck ran. The pump is definitely not coming on, I've yet had a chance to check the pump by hooking a power source directly to rule out whether the pump is bad or just not getting power. I just think its strange that everything that's going in would be something that would not work if the ASD relay was out. But I've swapped it with more than one relay that I know works, and I know the relay is getting constant and key on power like it should, but it just seems like its not putting out the power.
I think I need to pull the fuse box and check the wiring.

 

I don't recommend disconnecting/reconnecting the battery with the key on. As was earlier stated, it's a good way to fry electronics.

Did you check your fuses by looking at them, or with a test light or DVOM?

Fuse 6 should be hot all times. Fuse 9 should be hot with the key on. Are they?

 

I checked fuses with my multimeter.
Also, fuse 6 and 9, are they in the fuse box in the cab or in the power distribution center under the hood? The only fuses numbered are the ones in the cab and one of them is the wiper fuse so I dont think thats the ones I need to check. The ones under the hood are not numbered. What fuses should I be checking?

 

It could be the same as the jeeps . In 1998 , the key doesn't work . All other years , no prob .

Robbie , you said the cat got smashed , I'm wondering if the wiring for either 02 sensor is damaged and shorting out . It would result in a no start for sure so I would check that out .

As for the fuses , I like to pull , check , and reseat everything when I buy it . I like to know everything has good connection . So much easier when nothing is wrong , no checking fuses I like your idea of checking out the PDC wiring .

No spark , not even first 3 seconds of cranking ? Pretty rare for a coil to fail but not unheard of either . You may or may not have one on your Cherokee you could swap to try (depends on production date , late model has coil pack) Or , one of your jeep buddies with and earlier model . They are all the same 97-98-99 in the jeep/dodge . Better than wasting $50 and worth a try just to rule it out .

No fuel pump prime sound . Either something is shorting out tripping the ASD or the pump is bad . That's why the 02 wiring needs to be checked given the history . I'd just unplug them both and try a start . Not sure , but , you should be able to access the plug-in for the pump and test the power there .

Not exactly unheard of for the PCM to fail either but your not really getting typical symptoms IMO .

 

Key dance doesn't work on my 2000 Cherokee. But has worked on all other years Ive owned (99 and olders, but never a 98)

I know for a fact the cat is junk, I need to cut it off and replace before I actually start it and let it run. My plugs were totally fouled from it from before.

I read somewhere about earlier models (or maybe it was dakotas) having issues with wires to/in/around the pdc rubbing an shorting out causing similar issues, so I figured it was worth a shot.

Yeah, absolutely no spark. I currently own a 2000, a 93 and a 95 cherokee. The 93 and 95 are OBD1 and probably wont work, and my 2000 has the coil pack like you mentioned. I could get my hands on a coil from another jeep pretty easily.

I definitely agree with the ASD relay tripping out, I just have a strong feeling its something related to that. Also, that was my plan for the fuel pump, I was going to pull the plug and hook a power source to it to see if it primes.

Can you confirm that I have this correct:
1) ASD relay output
2) Fused B+
3) Fuel Level Sensor Signal
4) Ground
5) Sensor Ground
6) Ground

 

I think you need to start looking a the pcm since it's not responding to the ignition being turned on.

 

This was actually my first conclusion, but I was "talked out of it" by other people. Is there a way I can test it or should I just head to the local lkq and pick one up and try it?

 

Well you need to test the input voltages and make sure everything is there. If you are not getting anything out of it (voltage to turn on the relays)it's most likely bad. You will need a detailed wiring diagram of the truck/pcm to find them.

 

Can I find the wiring diagram(s) somewhere online, or should I purchase a Haynes/Chilton manual for the truck? I have a haynes manual for my Jeeps and it has wiring diagrams, but Im not sure if they have anything detailed enough.

 

Best I can find for ya is 2001 . Shouldn't be a lot of change , I hope .
01 Ram
http://www.mediafire.com/view/azahhd...rts_Manual.pdf
http://www.mediafire.com/view/oeeqjy...ice_Manual.pdf

I'd still try a coil if you can borrow one and inspect that 02 wiring for damages . Or , try yours on a buddies jeep 96-99xj 96-98zj

Hopefully you can find confirm that diagram with a little testing . I was gonna suggest a by-pass but wasn't sure of the schematics do didn't bother . I had to do this on a 96 chev dually I had , after hundreds in new parts . 2 cents worth of wire fixed 'er up and I stopped digging into it at that point being a work truck . Ran it 2 years after and sold it like it . Worth a shot at this point .