Recent content by VAcherokee

It's been 4 days and 250 miles. Gauge works PERFECT all... Waiting on charging system faults still. :-)

PROBLEM SOLVED! FAULTY AIRTEX ASSEMBLY Just completed the fuel pump module assembly (BOSCH 67658 @ NAPA AUTO PARTS FOR $300). I completely emptied the fuel tank and installed the tank up into the Cherokee. I plugged in the connector, turned the key to RUN and the gauge read E and a few seconds...

According to ALLDATAPRO (had a friend look into it) The diagnostic procedure for P0460 / P0462 (Fuel level no change / fuel level sending unit low voltage) BOTH show a problem if the voltage to pin 4 is ABOVE 4.7v. With that said, I'd have to assume 97/98 Cherokee's are supposed to have 5v at...

Bosch pump in hand. I plugged it into the body harness and tested all the major increments... Gauge responded to the corresponding locations. I'm going to install it and add fuel in 5gal increments. I'll keep ya'll posted. Sidewinder CC, I might just do that, thanks for the link!

I'm curious if 98 and older had 5v signal down to pin 3... Regardless, I'm on my way too pickup a BOSCH 67658 pump 2hrs away. This way, I have a KNOWN GOOD pump assembly to test with. I'll continue to update.

Basically being short on tools and rain, I did what I could... can you please confirm with your jeep if you don't mind that I should have 5v? I'd be MUCH appreciative of that! I'll try and post pictures of my sending unit and you can see 4 of the five contact points I used to emulate tank...

Confirming, plug is in correct orientation. I pulled the harness up into the cab plugged it back into the fuel pump and performed several key ON tested using my bad sending unit and a jumper wire from the armature ground to the 5 major contact points on the sender. Below is what I was able to...

Also, since the pump was out AGAIN, I went ahead and returned it. I also wanted to point out an interesting fact... I had my wife monitor the gauge while I had my Faulty OEM pump module assembly plugged in (outside the tank). Since I know this sending unit didn't work, I removed the armature...

I ran it in RUN position KOEO (Key On Engine Off) I can see how the diagram vs connector could get confusing but I got that sorted out. Voltage was 5.14 PIN 3 RUN position.

UPDATE: ALL MEASUREMENTS WERE WITH PUMP ASSEMBLY DISCONNECTED FROM BODY HARNESS & KOEO *Pin 6 ground confirmed GOOD. *Pin 3 voltage 5.16v *Pin 4 no voltage.

Ok, I'll follow-up in the am.

Sounds like a plan. You and sidewinder CC have really helped me out here. Since I lost access to alldatapro and my tools are 3000 miles away, it hasn't been easy to T/S my concern! Thanks a ton! :party:

I'll disconnect the harness tomorrow, key up the xj and record the voltage on pin 3 with the meter grounded to the chassis. Am I following you correctly? Electrical troubleshooting is my weakness... This thing throws a rod, well now, I'm all over it!

On the OE or Airtex? what should it be? If you know what the voltages should be, please post them and I'll check again in the morning. It's pitch black outside. Thanks!

I also wanted to emphasize when I had the OE & AIRTEX pumps side by side the armature on the AIRTEX was up higher than the OE. I performed a mechanical sweep of both sending units and when they were compared and marked at 1/4 tank, the AIRTEX armature float was exactly 1/4 tank higher! SO: If I...