My jeep runs fine at the moment, all the gauges seem to work, and the overhead display seems ok. When I start it up, sometimes the odometer shows strange characters and cruise shows on. Sometimes it will clear for awhile, but then the numbers will flash off and on, or go dim, or it will show the strange characters. Any ideas on where to start
SOURCE: 1999 jeep grand cherokee / 4.0 L.
I had a skim module go out in mine in the ignition, and I have a 2001. It's a 100 part, and now it starts fine.
SOURCE: GAUGES GO CRAZY AND SOMETIMES VEHICLE WON'T START
Poor grounding can cause many of the conditions you have listed. When checking power with a volt meter, this goes unnoticed because the meter does not draw enough amperage to cause the bad connection to break contact. Your battery is grounded to the engine block and also has a small lead to the fender. Many components have individual ground leads as well (including most computers) I would check all ground leads and clean the contact surfaces with sandpaper or a wire brush. Adding an additional ground wire is a good idea as well. Don't forget that the dash board frame must also provide a good ground as well.
Many times this is all you need to do...sometimes though, control modules can be damaged because in having a partial ground, they build up heat, due to additional resistance in the circut.
This may or may not cure your problem, but it's worth checking out. Grounding is often overlooked, especially if it has not completely broken down.
SOURCE: 2004 jeep grand cherokee will not start, dash
It takes very little voltage and amperage to operate dash gauges. You cannot rely on "seems" when it comes to the battery. A good battery should have standing voltage of at least 12v and be able to "snap back" from a fifteen second 200 amp load. Under load, the voltage should not drop lower than 9.5 volts. Have the battery charged and load tested before going anywhere else with this. then make sure connections are clean and tight. After you get it started, if battery was good, check starter draw and charging system operation. If it does not start, check power flow from key through neutral safety switch and starter relay to starter.
Testimonial: "very helpful , battery was no good , installed new battery. problem solved"
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