Ben824
NAXJA Forum User
- Location
- Woodstock, GA
Hey guys, been a while since I was on here. So my uncle brings his 99 XJ Sport 4x4 Auto 4.0 to me for work that needs to be done to it.
Recently he brought it to me with an intermittent gauges situation. I think its the usually dirty contacts so I pull the gauges and clean the contacts, put a little dielectric grease on there and put it all back together.
That did not fix the problem, not even the slightest.
First, the XJ will not pass emissions here in Georgia because it is still in Readiness.
Second observation, all the indicator lights and the odometer still work regardless of the gauges being operational.
I thought maybe the grounds for the computer harness might be dirty or corroded so I went to address the grounds on the inner fender right next to the computer and still no change in the problem.
I checked the battery negative post, the negative cables, and the negative ground connection to the chassis. I even relocated the negative chassis ground because the old one was corroded with rust and the bolt snapped off when I tried to remove it. Still no change.
I even ran a test lead from the negative post all the way over to the negative computer grounds and no change.
What am I missing here?
What can I try next?
Is this maybe a faulty ECM?
I have a spare ECM from my 97 XJ I could test with but I know they changed something in 98 or 99 and started storing the VIN in the computer, will that be something of a problem is I try and hook the 97 computer up to the Jeep for diagnostic testing and ruling out of the faulty computer idea?
Recently he brought it to me with an intermittent gauges situation. I think its the usually dirty contacts so I pull the gauges and clean the contacts, put a little dielectric grease on there and put it all back together.
That did not fix the problem, not even the slightest.
First, the XJ will not pass emissions here in Georgia because it is still in Readiness.
Second observation, all the indicator lights and the odometer still work regardless of the gauges being operational.
I thought maybe the grounds for the computer harness might be dirty or corroded so I went to address the grounds on the inner fender right next to the computer and still no change in the problem.
I checked the battery negative post, the negative cables, and the negative ground connection to the chassis. I even relocated the negative chassis ground because the old one was corroded with rust and the bolt snapped off when I tried to remove it. Still no change.
I even ran a test lead from the negative post all the way over to the negative computer grounds and no change.
What am I missing here?
What can I try next?
Is this maybe a faulty ECM?
I have a spare ECM from my 97 XJ I could test with but I know they changed something in 98 or 99 and started storing the VIN in the computer, will that be something of a problem is I try and hook the 97 computer up to the Jeep for diagnostic testing and ruling out of the faulty computer idea?