20 Most Recent 1999 Jeep Grand Cherokee Questions & Answers

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1999 Jeep Grand Cherokee cranks fine but won't start, has spark, no fuel pressure on the fuel rail, full tank of gas.

Fuel pump failure. Have someone open your gas cap an listen closely while you try to start the car. Your listening for a buzzing noises, if no noise pump has failed, very weak noise not enough pumping pressure to start the car. All 'n All "FUEL PUMP FAILURE"
8/12/2021 10:17:06 PM • 1999 Jeep Grand... • Answered on Aug 12, 2021
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What does the code 1686 mean for a jeep grand cherokee

you have dash lamps acting funny? diesel engine? or gas, and what displacement? 4.0 , 4.7 P1686 did the immo lamp glow. did you scan the PCM and see if 1685 (wrong key code) 1686, rigth out of fsm Trouble Code: P1686 4.7L No SKIM Bus Messages Received Number of Trips to Set Code: 1 PCM details. Trouble Code Conditions: Engine started; and the PCM did not detect any MIC (I/P Cluster) messages over the Data Bus circuit for 20 seconds. Possible Causes:
  • Data Bus circuit from MIC to the PCM is damaged or it is open
  • Instrument Cluster is damaged or has failed
  • PCM unable to communicate with the Instrument Cluster
  • PCM has failed
this means, the PCM can not talk to the I/P cluster puter. comm fail. even wilder guess is PCM talks to KEY via cluster so if cluster dead so be key. bad fuses ? the FSm dont cover defeating any alrarms or IMMO less crooks read it. so...... google it.
5/4/2021 8:11:26 PM • 1999 Jeep Grand... • Answered on May 04, 2021
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What does the po152 mean

Definition O2 Sensor Circuit High Voltage Bank 2 Sensor 1This means for some reason your engine is running rich, to much fuel
3/18/2020 6:48:46 AM • 1999 Jeep Grand... • Answered on Mar 18, 2020
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1999 Grand Cherokee Limited Jeep anti-theft system

The 1996 Jeep Grand Cherokee Laredo Anti-Theft System is equipped with Vehicle Theft Security System (VTSS). VTSS system monitors vehicle doors, hood, liftgate and ignition. If an attempt is made to enter or operate vehicle without proper disarming of system, vehicle horn will sound, headlights, taillights and parking lights will flash, and engine will be prevented from running.

The following wiring diagram and electronics circuit contains detail schematics of The 1996 Jeep Grand Cherokee Laredo Anti-Theft System. Herein you will find interconnection between electronics parts of the system such as body control module, auto headlamp light sensor. VTSS led, driver door module, passenger door module, cylinder lock switch, junction block, power distribution center, and grounding. Herein you will learn also how the Vehicle Theft Security System works, removal, installation, testing and troubleshooting procedures.

Try HERE.

Also, remember that here can find the Jeep Grand Cherokee Service & Repair Manual.
Hope help with this.
1/17/2020 2:29:38 AM • 1999 Jeep Grand... • Answered on Jan 17, 2020
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2answers

Pr0blem with dual climent control not getting any heat

No one can guess for you You have to check for OBD Codes & use factory trouble charts, to diagnose that module & find a problem
11/27/2019 5:58:59 PM • 1999 Jeep Grand... • Answered on Nov 27, 2019
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99 Jeep Grand Cherokee Tailgate Lock

I don't think you need a wiring diagram.
Jeep had alot of problems with the lock accuator in the tailgate.
6/28/2019 8:26:45 PM • 1999 Jeep Grand... • Answered on Jun 28, 2019
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Left turn signal not working but blinks real fast when put on

sounds like burnt out bulb. This is usually an indication when the bulb blows. Turn on blinker and check front and back to see which bulb is out..
5/31/2019 11:38:20 PM • 1999 Jeep Grand... • Answered on May 31, 2019
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1999 jeep grand cherokee drives forward in reverse and neutral

Jeep has always had a problem down the line with the shifter linkage usuallly under the shifter, you have to take apart the console or column and locate whats broken inside there. I've had this issue myself with Cherokees too .
5/31/2019 8:39:12 AM • 1999 Jeep Grand... • Answered on May 31, 2019
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6answers

1999 Jeep Grand Cherokee Laredo stalls when put into drive, even after warming up.

Could be a dirty intake manifold and IAC valve. Spray some intake cleaner into the throttle body with the engine running to clean the system.
5/2/2019 7:13:07 PM • 1999 Jeep Grand... • Answered on May 02, 2019
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WHERE IS THE ECU LOCATED ON A 1999 JEEP GRAND CHEROKEE

Watch this video. It is on a 2000 but may be close to the same as a 1999. https://www.youtube.com/watch?v=lBwpusnz8cE
3/21/2019 3:10:19 AM • 1999 Jeep Grand... • Answered on Mar 21, 2019
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P1494 What does this code mean

In the fuel evap system you may have a defective leak detection pump.
3/21/2019 12:31:17 AM • 1999 Jeep Grand... • Answered on Mar 21, 2019
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My 1999 Jeep grand Cherokee limited with 75K and a brand new 247 transfer case still has a major problem when making sharp left or right turns. It chatters terribly. WHAt do I try next?

I take help from online websites that have this service like helping in repair some like reliable-store have instant help.. others are a bit slow which I don't prefer... rest is up to u.. U can also get free manuals
3/14/2019 9:55:51 AM • 1999 Jeep Grand... • Answered on Mar 14, 2019
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I have replaced the catalytic converter, all eight spark plugs,and all 4 oxygen sensor on my 1999 grand cherokee laredo 4.7L 4x4 and the computer is still giving me the same codes. The are P0135,and P

The computer might have to be reset.Check you manual to see if you can reset it or try disconnecting the battery.
2/8/2019 7:57:55 AM • 1999 Jeep Grand... • Answered on Feb 08, 2019
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99 jeep grand cherokee 4.7 v8 oil pressure

Oil gauge may be bad, you said you changed the oil sending unit, and tried a aftermarket which worked, so the other option is to have you oil gauge checked. The sending unit may be good but you gauge is not reading proper.
1/22/2019 12:12:03 AM • 1999 Jeep Grand... • Answered on Jan 22, 2019
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1999 Jeep Grand Cherokee Laredo 4x4 Car Alarm goes off on entry through any door.

If the alarm goes off, it its because it was armed in the first place. You mist disarm it before entering the vehicle. To disarm it push the remote control unlock button or open eithe front door or liftgate using the key in the keylock.
1/18/2019 5:15:34 PM • 1999 Jeep Grand... • Answered on Jan 18, 2019
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4answers

Passenger door light remains on; all interior lights remain on

is yiur batery in your key ok?
1/18/2019 3:38:30 PM • 1999 Jeep Grand... • Answered on Jan 18, 2019
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1999 Grand Cherokee Limited, 95,000

Hi.

If fuel pressure is low and you have already replaced the fuel pump, then the problem is usually the fuel pressure regulator. The pressure regulator is in same assembly with fuel filter. The assembly is located to the fuel tank, bolted to the truck's frame. The pressure is tested connecting a gauge like this : Set Sealey VSE952 to the port on the fuel rail. The pressure on Grand Cherokee must be around 49 psi plus or minus 5 psi. If engine runs but pressure is below 44.2 psi , check for a blockage in fuel supply line between fuel rail and fuel pump module (e.g.kinked line). If the line is not blocked, replace fuel pressure regulator and filter. Test pressure with and without fuel cap on.

Another test to be done is reading pressure, then shutting the engine off with the gauge connected. If pressure goes down too quick, then the regulator is defective. After 5 minutes the pressure should not go below 24 psi. If it does replace the regulator.

If regulator is OK check for leaks at the injectors that can cause fuel pressure drops.To check for injectors leakage clamp off the rubber hose of the pressure gauge tool between fuel rail and the port. If pressure staysr above 24 psi and before was dropping, then a fuel injector or the fuel rail is leaking.

Below a diagram representing the fuel rail and test port. The engines from same years like your six cylinder have the port and rail in the same position.


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Regards.

Ginko
9/30/2018 2:38:34 AM • 1999 Jeep Grand... • Answered on Sep 30, 2018
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When i get up to55 to 60 mph my truck make a

is it all wheel drive? It's probably your front drive shaft. Very common.
5/16/2018 5:07:39 PM • 1999 Jeep Grand... • Answered on May 16, 2018
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