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  #1  
Old 08-30-2015, 12:45 PM
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How can I repair a 1992 wrangler ecu ?

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  #2  
Old 08-30-2015, 08:06 PM
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Re: How can I repair a 1992 wrangler ecu ?

Would it not be better to exchange it for a remanufactured one?
The electronics need specialized knowledge on how to test and replace a component.
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Old 08-30-2015, 09:08 PM
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Re: How can I repair a 1992 wrangler ecu ?

Thank you for answering back. Just trying to find out if there was any other option, and how much time/trouble it would take. Any suggestions on a repair shop / SALVAGE YARD that would have one, and is the ecm specific to a wrangler or Will a Cherokee ecm interchange? Would one for a police application work as well? What would be the difference?
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Old 08-31-2015, 05:31 AM
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Re: How can I repair a 1992 wrangler ecu ?

Not sure about your questions, but i would take the P/N from your ECU and look for a same one. I would presume that an ECU from a cherokee from the same year or close to it would work as well.
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Old 08-31-2015, 06:43 AM
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Re: How can I repair a 1992 wrangler ecu ?

Thanks for your reply again,Franco100. I have looked the p.n.#-56027 384. Was told it was specific to wrangler. Just trying to sort through B.S. & fact. I just got the wrangler a few weeks ago.not running. The jeep thing is new to me. Thanks again.
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Old 08-31-2015, 07:34 AM
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Re: How can I repair a 1992 wrangler ecu ?

How did you come to the conclusion that the PCM is the problem? Is there a fault code set?
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Old 08-31-2015, 08:11 AM
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Re: How can I repair a 1992 wrangler ecu ?

Check engine light is on. Can't get it to flash when doing the ignition switch : on,off,on,off,on. If that's the right way to test it? Engine cranks but will not start. No spark at coil secondary. New crankshaft sensor. Still no spark. Ecm has dry rot cracks all through the jell that covers the inside of it and it flakes off if you rub it with your finger. Ecm may still be good?,but since I'm at this point I would rather fix or replace it with one that at least looks better anyway. Not the best way to see if ecm is at fault, any other suggestions?

---------- Post added at 01:11 PM ---------- Previous post was at 01:10 PM ----------

Frango100, Thank You again.
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Old 08-31-2015, 08:43 AM
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Re: How can I repair a 1992 wrangler ecu ?

You dont have a scanner or can borrow one to check for codes? Do the fuel gauge and volt gauge indicate normally? Does the fuel pump run for some seconds, when ignition is switched to run? Did you already try and swap the auto shutdown relay? There is ofcourse a change that the PCM itself is at fault, but i would eliminate all other possibilities first before dumping your hard earned $$$ into it.
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Old 09-14-2015, 09:32 PM
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Re: How can I repair a 1992 wrangler ecu ?

What type or kind of scanner will work with it?
The ignition switch thing doesn't show up anything. Check engine light comes on along with a arrow pointing up. All relays in engine compartment Check good.4.4 volts going to Ckps. Shouldn't there be 12volts?
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Old 09-15-2015, 06:34 AM
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Re: How can I repair a 1992 wrangler ecu ?

The 4.4 V at the crank sensor is ok. The PCM regulates more or less 5V for the sensors.
Your jeep being before 97 should use OBD1 protocol for the scanner. There is no autozone or alike in your nabourhood for the scanning? But since you see the spots going through the jelly stuff inside the PCM, there is a good change that it has reached the electronics and caused a short internally.
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Old 09-15-2015, 04:00 PM
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Re: How can I repair a 1992 wrangler ecu ?

Pcm had three bad capacitors from what I was told and repaired by(circuitry repair) in New York. Reinstalled cleaned electrical connections with dielectric cleaner and put dielectric grease on connectors. Still won't start. When ignition switch is turned to the on position, light stays on. Will not flash. I will get an obd1 scanner. Any suggestions on what kind? Thanks for your advice.
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Old 09-15-2015, 08:19 PM
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Re: How can I repair a 1992 wrangler ecu ?

Sorry, no suggestions for the OBDI scanner. Was the PCM completely tested and found ok?
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