4x4 stopped working a year or so ago. I researched the system and worked my way through potential problems. I replaced the solenoid on the fire wall that controls vaccuum. That didn't fix the problem so I moved on to the hub actuators. Both of them were bad so I replaced them and everything went back to working fine.
You don't need 4x4 until you need it. And that is a fine time to find out it's no longer working.
Before, the light was coming on but I had no 4x4. Now the light isn't even coming on. I checked the voltage coming into the solenoid and it measures exactly the same when switch is on 2H, 4H, and 4LO. That does not seem normal but I'm not 100%. I pulled the vac lines off the solenoid and I have vac on the bottom line coming in but not the top, which makes sense. I assume the solenoid allows vac through until 4x4 is engaged and then it shuts it off. When I hook just the bottom line up (the one pulling vac) to the solenoid, I get vac pulling through the solenoid regardless of 4x4 switch setting. That seems like a problem.
So do you think the solenoid is bad? I would if i hadn't just replaced it a year ago. The original design from factory allowed water off the hood to compromise it but this one is a newer one with a rain cover. How could I test it? Apply 12 volts and see if I can blow through it? I guess I have kind of already done that since I know I am getting voltage coming in.
My next thought would be the 4x4 switch but I'm not sure how to test it.
I have tested all of the 4x4 associated fuses shown in the manual.
You don't need 4x4 until you need it. And that is a fine time to find out it's no longer working.
Before, the light was coming on but I had no 4x4. Now the light isn't even coming on. I checked the voltage coming into the solenoid and it measures exactly the same when switch is on 2H, 4H, and 4LO. That does not seem normal but I'm not 100%. I pulled the vac lines off the solenoid and I have vac on the bottom line coming in but not the top, which makes sense. I assume the solenoid allows vac through until 4x4 is engaged and then it shuts it off. When I hook just the bottom line up (the one pulling vac) to the solenoid, I get vac pulling through the solenoid regardless of 4x4 switch setting. That seems like a problem.
So do you think the solenoid is bad? I would if i hadn't just replaced it a year ago. The original design from factory allowed water off the hood to compromise it but this one is a newer one with a rain cover. How could I test it? Apply 12 volts and see if I can blow through it? I guess I have kind of already done that since I know I am getting voltage coming in.
My next thought would be the 4x4 switch but I'm not sure how to test it.
I have tested all of the 4x4 associated fuses shown in the manual.
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