Why does my Jeep Grand Cherokee have no power?
If there is no power, the problem is between the battery and relay. If there is power at the relay, have a helper hold the key in the start position. There should now be power to a second terminal. If there is no power, the problem is in the ignition switch or with the security system.
What to do if your Jeep Grand Cherokee won’t start?
When a starter goes bad, they will usually not give you much warning first. Also, if you are stuck somewhere and are trying to start your Grand Cherokee, the old beat the starter with a hammer trick is not a wives tale. It really can get that one last start out of it.
What are the most common problems with Jeep Grand Cherokee?
The 4th generation seems to have the most complaints, specifically the 2011 model. It was the first year of the new generation with about 623 complaints on the NHTSA for electronics. The culprit for the electronics failing was the result of the vehicle’s TIPM or Totally Integrated Power Module.
How can I tell if my Jeep Grand Cherokee battery is bad?
Check the battery for 12.5 volts. If it has less, charge it or jump it and if the car starts check across the battery to see if there are about 14.5 volts with the engine running. If not the alternator is bad. If it has the proper voltage, the battery is bad. If the battery was good, check the fuses and the starter relay.
What causes a Jeep Grand Cherokee to not start?
Jeep Grand Cherokee Won’t Start Diagnosis. 1 1. Battery Cables. While the battery cables are not necessarily the most likely issue to cause your Grand Cherokee to not start, they are some of the 2 2. Battery Charge. 3 3. Starter. 4 2. Ignition Issues. 5 3. Engine Timing.
Why is my Jeep Grand Cherokee going limp home?
It sounds as if the transmission has gone into the “limp home” mode, which usually is due to a malfunctioning sensor input to the transmission. However, the dealer should be able to find a code quickly from the OBD computer. It shouldn’t take days to do that. The 8/4 (MDS) almost certainly has nothing to do with the problem. . Does not Work 1.
What kind of ignition system does a Jeep Cherokee use?
The ignition system is the one tasked with creating and delivering spark to each of the 6 cylinders. Without spark, the engine will crank but no start. The ignition system of the Jeep vehicles covered by this tutorial use either a distributor type system or a COP (Coil-On-Plug) ignition coil system. Failed ignition coil.
What is the yellow wire on a Jeep Grand Cherokee?
The yellow wire with a bold black stripe around it is the airbag actuator wire. It is very obvious and not a problem when doing electrical work. Do not probe this wire. If a yellow wire with a big bold black stripe is probed it will likely set off the air bag and do bodily harm. Enough said! Check the battery for 12.5 volts.
What do I need to know about my Jeep Grand Cherokee?
A wiring diagram for the vehicle is a major help for harness problems and for computer related problems. All components that require high amperage will have a relay between it and the switch. The higher the draw or amperage necessary to operate a component the larger the wire.
What to do if your Jeep Grand Cherokee has electrical problems?
The get oxidized / corroded and voltages get spotty especially when they get some moisture in them. Most auto parts stores carry generic, pre-made cables in a variety of lengths. When swapping them out, always opt for a larger gage wire as this was another area the factory saved .01 cents per 10 zillion Jeeps.
Why does my Jeep Grand Cherokee not start?
Most of the Jeep charging / starting issues are caused by the crappy ground points & corrosion / oxidation. A new battery might be needed but check the cables first. To all: Don’t use those crappy clamp on battery terminal clamps!
Where did my 2003 Jeep Grand Cherokee die?
I have a 2003 Grand Cherokee and yesterday at 80 MPH the thing just died in the number one lane of I-5 in San Diego County. The speedo went to zero, panel lights off, etc. After muscling it to the shoulder of the road, tried to restart and no way Jose. Towed the thing to my driveway where it awaits some help.
What should the voltage be on a Jeep Grand Cherokee?
With the car running, the voltage across the battery should be 14.5. Anything much lower and it will take to long to charge the battery. Turn on the lights and the air conditioning. The voltage should remain the same. If not, replace the alternator. To correct a check engine light, an OBD II code scanner will be needed.
If there is no power, the problem is between the battery and relay. If there is power at the relay, have a helper hold the key in the start position. There should now be power to a second terminal. If there is no power, the problem is in the ignition switch or with the security system.
A wiring diagram for the vehicle is a major help for harness problems and for computer related problems. All components that require high amperage will have a relay between it and the switch. The higher the draw or amperage necessary to operate a component the larger the wire.
With the car running, the voltage across the battery should be 14.5. Anything much lower and it will take to long to charge the battery. Turn on the lights and the air conditioning. The voltage should remain the same. If not, replace the alternator. To correct a check engine light, an OBD II code scanner will be needed.
The yellow wire with a bold black stripe around it is the airbag actuator wire. It is very obvious and not a problem when doing electrical work. Do not probe this wire. If a yellow wire with a big bold black stripe is probed it will likely set off the air bag and do bodily harm. Enough said! Check the battery for 12.5 volts.
Are there any problems with the 2020 Jeep Grand Cherokee?
Electrical system, engine and powertrain issues among the top complaints received by the NHTSA from vehicle owners The 2020 Jeep Grand Cherokee is hailed as one of the best SUVs on the market. Even the company states it helps owners “leave a lasting impression.” However, the impression left on most isn’t favorable.
Why do the lights go off on my Jeep Grand Cherokee?
The symptom is that the all the lights and gauges on the dash cluster go on and off erratically and sometimes stay off for a few minutes. This also includes the A/C system. As the gauges go off so does the A/C fan. I have taken the Jeep to the dealer now going on 5 or more times and quite frankly, they are stumped.