Yellow means weak spark should be blue check the coil tower where the coil wire attaches on the coil for corrosion. Also check the spark plugs for wear.
SOURCE: 1997 Jeep Cherokee(4.0) will not start. No spark
It sounds like the crankshaft sensor is the problem
SOURCE: 1993 JEEP GRAND CHEROKEE LAREDO- TRUCK WONT
OK...I have a 93 outside...one diagram I have shows an ignition module next to coil...but there is none on mine, (4.0 engine)
Two items to check are crank sensor and cam sensor inside distributor. Test procedure can be found in just about any manual including haynes.
You will need a decent volt/ohm meter to do testing. You can also check codes by turning ignition switch on/off three times, leaving it on the third time. Check engine will flash code #'s (ex: one flash, pause two flashes= the number twelve.then followed by a longer pause then another set of flashes etc.)
SOURCE: 1994 Grand Cherokee Jeep wont start
It is likely one of your battery cables loose. Same thing just happened to me today. What you need to do is first lock the doors, and close them. Then you need to disconnect, and reconnect the battery cable, then if the security lights still blink you must use your key to unlock the door, then it should stop blinking, and start just fine.
SOURCE: speakers for 1994 jeep grand cherokee
6.5" in all the doors dash is wierd. 2.75" but i have been able to squeez in a 3.5"
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