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Re: 96 Jeep Grand Cherokee won't start, has a good...
Check for ignition voltage at the purple wire in the starter when you open ignition to the crank position , with a test light,, if the light light on them you need to change the starter..
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I would start with the Fuse Box under the hood. Start by pulling the Fuse's 1 at a TIME!! I have done it befor time & time agean. It's probley by the Battery. It's a black box that has " Main Fuse " or something alone that line. There just like the Fuses under the Dash, BUT BIGGER! They can be hard to tell if they blew. I have done it so, much that I know. If it's not that I would check the Fuse Box in the Dash. Jerry Dunn
did you replace the ECu with a used one or new. if it a used one did you match it to the old.why di you change the ECU.? when you turn the key in the start position does the fuel pump turn on? does it crank? do you know if there is spark if you pull one spark plug wire?
check the battery conections for tightness then check continuaty to starter motor.. if power is getting to starter , could be starter. however if any of the dash lights go dim when turning key , suspect the battery.
Try gently tapping the starter motor with a hammer or bar. There may be a bad contact in the sollenoid or the starter motor brushes worn to their limit. Tapping may give you a tempory fix if the problem lies in the starter motor.
try the 15 amp fuse under the hood by the battery if its blown put in a 20.
turn on the key and wait for all the ligth to go out then try it if it dosnt start the first time do it a 2nd same thing
hope it helps
I had a similar problem with my 2004 Jeep Grand Cherokee. It turned out that the battery posts and cables were corroded. I cleaned them up and it solved the problem immediately. Something to check on before you spend the money on a new battery anyway!
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