Jeep Liberty Electrical and Lighting Problems

Anorton1982

Ok so I have a 2002 Jeep liberty limited 4x4 and one day we go to get in and the doors won't unlock so I figured key fob is dead and unlock it manually. Well upon driving I have no speedometer so I hook up the code reader and replace the speed sensor. But upon the sun going down. I turn on the lights. And I have no headlights, but do have high beams. No running taillights but have turn signals and brake lights. No door locks, no windshield wipers, no dome or dash lights, no radio. I have replaced the body control module, checked all relays and fuses before and after replacement, replaced the multifunction switch, and the ignition safety switch. And still nothing. I have tried the code reader again but no codes are showing up. So what do I do now? Because 6 mechanics in and I can't get it on the Rd.

thecardoc3

You need to find someone with the right tools and training to perform the diagnostics. I suspect when you say you have "high beams", you mean that you are holding the lever in the flash to pass position but they are not on when simply turned on and in the high beam setting, is that correct?

How were the fuses and relays checked? Be specific.

When a full functional scan tool is connected to the vehicle does the various switch input data match the commands? Can relays (components) be commanded on with bi-directional commands?

Anorton1982

The high beams work when I pull the switch back but don't stay on no. A multimeter was used to check the fuses and relays. As far as the odb scanner idk

thecardoc3

That is the "flash to pass" circuit and confirms that some parts of the system are working correctly. Where did you get the body control module? You really need a scan tool that can see the body computer input and command data.

TAB4162

I have a 2012 Jeep Liberty Jet Limited Edition. Right now the issue I am having is off and on. While driving my car the dash lights will go out and when that happens my door locks will no longer work. Everything else so far is working fine. I can not find an answer to this issue. If anyone has had the same problem advice would be appreciated.

thecardoc3

Has anyone tried to pull codes from ALL of the modules in the car? When you say the dash lights go out, are you referring to the back lighting that includes the shift console, radio, and door switches? By chance are you also losing the exterior parking lamps?

The door locks are all computer controlled. Each door has its own door module and sends commands to the TIPM (Totally Integrated Power Module) which is the under-hood fuse block assembly. The TIPM controls the door locks by switching lock and unlock relays. A common theme to the circuits that are acting up is the TIPM, but this needs to be tested and confirmed while the problem is happening. A full functional scan tool could allow a technician to see in scan data if the TIPM can see the door modules and the lock/unlock commands. The tool would also allow the technician to command the door locks without using the door switches during the testing. Once someone proves that the TIPM is failing, then you can look into having it replaced or repaired. They are currently unavailable from the manufacturer.

EfrainCooke

Do you know a good car service in Atlanta?