20 Most Recent 1999 Jeep Grand Cherokee Questions & Answers

Definition O2 Sensor Circuit High Voltage Bank 2 Sensor 1This means for some reason your engine is running rich, to much fuel

1999 Jeep Grand... | Answered on Mar 18, 2020

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.


Also, remember that here can find the Jeep Grand Cherokee Service & Repair Manual.
Hope help with this.

1999 Jeep Grand... | Answered on Jan 17, 2020

No one can guess for you

You have to check for OBD Codes &
use factory trouble charts, to diagnose
that module & find a problem

1999 Jeep Grand... | Answered on Nov 27, 2019

I don't think you need a wiring diagram.
Jeep had alot of problems with the lock accuator in the tailgate.

1999 Jeep Grand... | Answered on Jun 28, 2019

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..

1999 Jeep Grand... | Answered on May 31, 2019

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 .

1999 Jeep Grand... | Answered on May 31, 2019

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.

1999 Jeep Grand... | Answered on May 02, 2019

Watch this video. It is on a 2000 but may be close to the same as a 1999.


1999 Jeep Grand... | Answered on Mar 21, 2019

In the fuel evap system you may have a defective leak detection pump.

1999 Jeep Grand... | Answered on Mar 21, 2019

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

1999 Jeep Grand... | Answered on Mar 14, 2019

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.

1999 Jeep Grand... | Answered on Jan 22, 2019

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.

1999 Jeep Grand... | Answered on Jan 18, 2019


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.




1999 Jeep Grand... | Answered on Sep 30, 2018

is it all wheel drive? It's probably your front drive shaft. Very common.

1999 Jeep Grand... | Answered on May 16, 2018

Pretty simple unbolt and bolt back on operation. One thing though is most rebuilt pumps come with no pulley and you will need a machine shop to transfer yours to the new one. A special tool is necessary to do that so don't attempt it without the tool. If you haven't ever done this work, get a manual such as haynes or chiltons...it will not only help you there but in the future too.
After it's installed, fill the reservoir with power steering fluid and gently turn the steering wheel all the way in one direction (running) and then all the way in the other direction. Re-fill the reservoir and do the same again 'till the air in the system has been purged. Some fluid foaming and slight noise is normal but should disappear after a half hour or so.

1999 Jeep Grand... | Answered on Apr 18, 2018

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