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Old 03-21-2015, 03:59 PM
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Angry 97 wrangler

in oct I bought a new car ..parked jeep for winter until I could replace the soft top
97 4cyl. 2.5 5 speed
when I parked it it ran
Jan tried to start it get it into garage dead battery & ended up a bad battery..gauges were working charged battery enough to get it to crank & gauges went out..I figure bad battery let it sit a while longer until weather breaks...now I got a new battery..still no gauges work no check engine..
cranks but wont start put in a new cps after reading some threads nothing??
Now when I put my key in ignition I should here the door open beeps but do not unless I push in a bit harder then I get the beep ..
could my ignition switch have gotten wet & bad causing the ecu not to come up?
or am I looking at the wrong areas...help please I am ready for camping & kayaking season

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Old 03-21-2015, 04:58 PM   #2
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The only way to know is to get a code reader and see, not sure if they would work on a 1997 though? The starting could be fule related, did you use Stabilo or any other stabilizing agent before you put it away for the winter? Good luck.

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Old 03-21-2015, 05:21 PM
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yes put stabil in it..
gauges out & seems that no ouput from ecu all fuses test good
can I check output from ecu somehow?
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Old 03-21-2015, 06:49 PM   #4
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Look for 5 volts at speed sensor and TPS
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Old 03-21-2015, 07:51 PM   #5
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Its easy to replace the ignition switch and its cheap. Chances are good that since 1997 that switch has been turned one too many times. There are plenty of threads showing how to do it. You will need a tamper proof #10 torx wrench that most auto parts stors carry. It took me about 15 -20 min to do mine.
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Old 03-21-2015, 10:35 PM
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Now if I remove f6 30 amp fuse under hood the fuel relay comes on & runs if I plug it back in it shuts off...also if key on & I unplug block 3 from ecu & plug in slowly all relays activate but still no gauges..could this be telling me ecu is still good just not comunicating do to a short??
Cranks great maybe still a bad battery?
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Old 03-21-2015, 10:38 PM
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Sp similar symptoms?
Did it fix it...Turning key should power ecu?
With key on I have power to fuse 9 10 11 in glove box?
Also will check volts at tps tomorow..
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Old 03-21-2015, 11:14 PM
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Digger I read another post that you made on this topic?
If I don't have the volts there ..that you are able to create those volts thru a cell phone charger??
If I find this problem could you help me with this?
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Old 03-22-2015, 08:12 AM   #9
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Old 03-22-2015, 11:27 AM
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At crank sensor I have -.4 @ cam sensor -0
Pin a to ecu have 12 & @ battery 12.4
Unplug black from ecu & all relays work..
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Old 03-22-2015, 01:45 PM
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no volts to any sensor 1.4 at a17
0 at b31?
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Old 03-22-2015, 04:50 PM
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Digger if I am correct tapping into they a 17 wire & b31 with a 5 volt from USB cig lighter should fix my issue?
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Old 03-22-2015, 04:52 PM   #13
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The PCM supplies 5 volts on 2 or three harness wires to power the sensors

To see which ones for your year see FSM on line at Morris 4c4 knowledge base on their web site
Or download from jeepslimited.com after joining for free

If the PCM is not supplying the 5 volts you have three options

Replace PCM

Or

Try solder repair as shown on youtube link I posted

Or

Supply 5 volts with external voltage regulator like found in walmart items that plug into cigarette lighted and have USB ports as USB ports need 5 volts However make sure the amperage output is sufficient for the sensors you are powering
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Old 03-22-2015, 05:15 PM
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Thank you will try these..& repost
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Old 03-22-2015, 05:41 PM
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Digger I realy apreciate your help here...If the relays are coming on would that eliminate the computer as the issue?
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Old 03-22-2015, 05:49 PM   #16
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Nope if the PCM is getting 12 volts and a good ground and not producing a 5 volt output it has an issue
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Old 03-22-2015, 05:58 PM
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Thanks I love this forum great people..Going to recommend it to some others!!
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Old 03-22-2015, 06:38 PM   #18
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Clean your grounds. Especially the one on the side of the block. Bad grounds cause all sorts of strange problems. You can appear to have voltage but circuits will fail under load.
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Old 03-23-2015, 03:51 PM
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Ok I took the 2nd battery & had it tested at autozone & told it is bad...could this be my whole issue? Bad battery causing all of this?
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Old 03-23-2015, 03:55 PM
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This all started when I cranked the engine on a battery charger...trying to exhaust all options before I try tapping into wires or getting a new pcm....
Have no power to coil either or must thus be done while cranking...
Relays all work..
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Old 03-23-2015, 03:59 PM
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This all started when I took first battery & charged it cranked it while still hooked to charger if that helps...trying everything before splicing into wires or opening up pcm...power into pcm but nothing seems to come out?
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Old 03-24-2015, 05:28 PM
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Ok digger I finaly got some help ...& find that when I turn the key to on position no relays engage...
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Old 03-24-2015, 06:28 PM   #23
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Ok did he decide why the relay was not tripped
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Old 03-24-2015, 08:16 PM   #24
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Look up ASD relay function and control and trouble shoot it
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Old 03-25-2015, 09:06 PM
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Digger I haven't figured out why they are not coming on yet..However everything in pdc has power to it..With key on..?
Next step?
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Old 03-26-2015, 06:21 PM   #26
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Trouble shoot the wires connect to ASD relay
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Old 03-28-2015, 03:35 PM
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I have noticed something about holding trip button in while turning key on & gauges sweep...This does work on mine if that helps??
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Old 03-29-2015, 03:16 AM   #28
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You have a shutdown relay, could be turning power off to the coil. I have a 97 too. I would suggest looking for a code but the 97's do not have obd 1 or obd 2. You need the fancy programers from a shop to read the code. Would be worth it rather that trying to check every sensor. I know it sucks.

Something easy to try first is new battery posts, I like the nascar posts. A lot harder than the factory ones. The factory posts connectors do not like re stretching onto a new battery. Maybe check your main ground to engine too, clean and dielectric grease all connections (+) and (-). Do the same with the coil ground. You also have a ground on the dash up by the windshield. Check those grounds too. See if that helps. Since it is only 5 volts any bad connection could make it fail.
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Old 03-29-2015, 08:42 AM   #29
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97s don't have OBD2? Mine does 97 4.0 manual tranny. Under the dash, left of the steering wheel. I thought that was federally mandated after the 96 model year for all manufacturers. I used my standard OBD2 code reader when it wouldn't start.
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Old 03-29-2015, 08:49 AM   #30
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All passenger gasoline vehicles sold for use on roads in USA (excluding motorcycles and maybe high gvw trucks) were supposed to be obd2 starting
In 1996 hence the wrangler redesign

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