99 XJ on Road won't Start... - JeepForum.com
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post #1 of 10 Old 08-14-2016, 10:26 PM Thread Starter
GrtLksMarlin
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99 XJ on Road won't Start...

1999 XJ, 4.0-liter, automatic, 4x4...Just have a 1992 service manual set to go by.

Looking for some suggestions fellas for the morning when I get back out to my 99 XJ. Shut it off without issue, after driving down a good dirt road (so no off-roading damage), came back to it and the starter will not engage. When I turn the key to start, electrical shuts off (as in dash lights, radio clock, overhead light), yet there is no sound. No starter or solenoid sound, nothing. Release the key to accessory and all the power comes back on.

Shifted into neutral and back many times, nothing.
Banged on shifter (you know hitting always helps), nothing.
Rapped on solenoid and starter, nothing.
Tapped the starter relay removed it and put it back (under hood fuses), nothing.
Checked the starter fuse (under hood fuses) as in "looked at seemed fine", nothing.
Checked the starter fuse (passenger side kick panel) as in "looked at, seemed fine", nothing.
Rocked the vehicle in park, nothing.
Seems to have plenty of juice.

* I'm unsure where the neutral safety switch is...
* I noticed the under hood PCM felt hot (believe that is what it is, drivers side fender beside air filter), and just because I'm stupid, wiggled the connections and tapped on it...

Once back in morning I intend on:
1. Checking fuses with ohm meter.
2. Checking relay with ohm meter.
3. Will rap the boogers out of the starter, bigger hammer thing.

What "in field" tests might you all suggest so I can get this thing out of there?

Thanks for any help you can render!

B.E.F.

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post #2 of 10 Old 08-15-2016, 01:57 AM
ou2mame
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Find the pins in the nss to jumper it to disable it. The plug is under the hood. The nss is on the tranny. Also check your battery terminals and ground. Also if you have a recording volt meter or a friend, try to find out if power is going to the starter. Don't just beat in it if you don't know if it's even getting power lol it did nothing to you!

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post #3 of 10 Old 08-15-2016, 04:36 PM Thread Starter
GrtLksMarlin
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Thanks for the help ou2mame!

As it stood, just now getting it home, I checked the relay and fuses without any problems, tried jumping the NSS without success starting it, checked the primary and ground cables with no problems found, and finally I checked continuity on the starter solenoid.

The solenoid terminal to the power showed continuity, however the solenoid terminal to the housing did not (although it is rather rusted). In any case I started it up after doing all those checks by the old screwdriver bridge to the primary lead and solenoid terminal.

Unless someone would care to enlighten me in that it has been so many years since I spent a lot of time working on vehicles, I guess I have a bit of reading to do to try and determine since I was able to start it that way if it is a fault internal to the solenoid, or somewhere in the starting circuit.

Thanks again for your help, now to fix it.

B.E.F.

P.S.: I whacked it just one more time because it makes me feel good
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post #4 of 10 Old 08-15-2016, 05:52 PM
ou2mame
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If jumping it works and the solenoid is getting power then the solenoid is shot.

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post #5 of 10 Old 08-15-2016, 07:53 PM Thread Starter
GrtLksMarlin
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Thanks for the reply!

B.E.F.
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post #6 of 10 Old 08-15-2016, 10:13 PM
ou2mame
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No problem, good luck!

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post #7 of 10 Old 08-16-2016, 11:37 PM
jordan96xj
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A full electrical shutdown (dash, internal courtesy lights, everything) usually indicates that there is a wiring/connection problem. Typically in the starting/charging system cables and related ground connections. The NSS usually will not be implicated in this type of symptom, as it just keeps the vehicle from starting, but it does not shut down the electrical system. I think you are experiencing a substantial voltage drop when the starter circuit is closed, and the PCM is shutting everything down to protect itself. Bad ground connections, corroded battery terminals, loose battery terminal clamps, and corroded battery cables are the usual suspects.

Check these basics before spending too much time or money on chasing the starter theory too far.


Things I keep around that help fix Jeeps:
AeroKroil and Fluid Film
BAFX Products 34t5 Bluetooth OBDII Scan Tool and Torque Pro OBD2 App for Android
Etekcity MSR-P600 Digital Multimeter
Bernzomatic TS4000 Trigger Start Torch + MAP Gas
1/2 inch sockets, Breaker, Cheater Pipe, and BFH
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post #8 of 10 Old 08-17-2016, 12:48 AM
XJK
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X2 on battery terminal clamps. Clean and reinstall. This has happened to me before


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post #9 of 10 Old 08-17-2016, 05:38 AM
RLE
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You can download a FSM for your 1999 XJ for $7.95 from this source:
http://www.pacificcoastmanuals.com/j...e_manuals.html

You can also download a 97-99 XJ Parts catalog for free from here:
http://www.jeep4x4center.com/knowled...anding+125x125
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post #10 of 10 Old 08-23-2016, 11:30 PM Thread Starter
GrtLksMarlin
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Thanks guys, I appreciate the advice!

B.E.F.
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