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2005 fx4 4wd not working
Ok, I realize this issue has been beaten to death but my 4x4 will not engage. No lights, no sounds, nothing. I have replace the fuses, relays, solenoid, all check valves, both actuators, the transfer case motor, and the switch. From the solenoid down the vacuum and actuators work fine. When I engage 4h the solenoid doesn't switch the suction to let the hubs engage. I am left to think its an electrical problem. Are there any inline fuses that I might have missed or maybe a PCM problem? Any other ideas?
One other thing is my ABS light is on. Any possible correlation? I appreciate any help. Adam |
so for an update. I fixed the ABS light and it didn't help. I used a voltmeter to test the solenoid power and it doesn't seem to get any. If the fuses are good (which they should be since I put new ones in) and new relays are in. Does anyone have an idea of why its not getting power?
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Thank for the reply. I have already gone through everything on the list. I am down to thinking its electrical.
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Just an idea, a switch on the 4wd shifter, when put into 4wd, sends power to the solenoid to take the vacuum away from the hubs??? I don't know off hand what sends power to it, may be someone else can direct you?
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When the system is working correctly, vacuum is placed on the system unlocking the hubs while the truck is running. When shifting to 4WD vacuum is relaesed, locking in the hubs. When the engine is started and running, vacuum is exerted on the entire system, unlocking the IWE actuators. When the engine is turned off or 4WD is engaged (either by floor shifter of dial selector) vacuum is released by the IWE solenoid to the actuators at the wheels. So vacuum to the actuators at the wheel unlocks the hubs for 2WD and release of vacuum by the solenoid locks them for 4WD. When 4WD is disengaged, the solenoid is opened back up, the high vacuum from the reserve from the vacuum box is then used to then exert vacuum on the lines to the actuators unlocking the actuators no matter what the vacuum from the engine is. |
I just found another symptom that may help. The 4wd indicator lights never come on and "prove out" when the key is turned on.
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new switch
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update on the 4x4. I had the pcm scanned and it seems to be the problem. I ordered a refurbished one from flagship one, inc. It is programmed to my VIN and come with 2 programmed keys for $240. It doesn't come until next week. I'll let you know how it works.
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did that work? having same problem with a 2004 no lights on dash when turned to 4hi or 4 lo. no power to motor as well, or does it have power all the time?
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The new computer fixed it. Had keys cut. Then the install took about 5min.
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Originally Posted by ronalb
(Post 5173531)
did that work? having same problem with a 2004 no lights on dash when turned to 4hi or 4 lo. no power to motor as well, or does it have power all the time?
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