M
Miguel351
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- Reaction score
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- Thunderbird Year
- 2004
The power window switches stopped working at some point. We live in Central California where summers get fairly hot so she rarely rolls them down in favor of just blasting the AC. But when she went trough the drive through with one of my nephews, the window wouldn't roll down. The reason why she never noticed it when it initially happened(whenever that might have been), is because the auto up/down sealing feature still works. Very strange.
When I first started diagnosing what was happening, that's what I saw: Power was still getting to the motors obviously, as they were doing their sealing dance, but the switches had no effect, regardless of key position or engine running. So, I took the master switch out and tested it for continuity and signal. I put my DMM on multiple pin combinations and got a change in resistance or signal for every switch action I performed, so I assumed the switch to be fully functional.
Then, I check voltages at the female connector that goes to the master switch. The ground checked out as good, and the power in(the YEL/RED, I believe on pin 4) shows nothing. I check it against the ground for a short, nothing, so it's not shorted out. I check it for resistance and it shows 1k ohms. Does that mean anything specific? Does a known working YEL/RED circuit produce the same result?
I've checked the fuses in the rear compartment and all check out good, specifically 20 and 28. The power door locks still work from the master switch and the key fobs. The passenger side window switch does not work. So, the problem is contained to window operation circuit only. Again, the window motors have power as they still do the auto seal function. I've check the REM to look for loose wires or connectors and found nothing. I have yet to disconnect and reconnect all the plugs going into it yet, as I know that's something Ford actually suggests. I've read up on some other threads looking for similar issues/solutions, but have yet to find something that mimics this particular situation. The closest one I've found so far, that also has some great circuit info that I used to hunt this particular circuit down is this one: https://forums.fordthunderbirdforum...window-issue-tbird-2002-still-searching.5985/ But again, it's close, just not the exact same issue. So this is why I'm posting here.
So, experts, what do I check next? Are there some specific fuses in the other panels to check? Is there a relay in the trunk fuse panel that needs to be tested? I am completely open to ANY and ALL suggestions. I'm just about certain there's a simple fix to this, outside of the REM being bad on just that one specific circuit. The first thing she had to do when she got the Bird was to replace the FEM, I'd hate to have to replace or rebuild the REM, too, but I know that's most likely going to happen eventually anyway.
I await your expertise!
-Mike
When I first started diagnosing what was happening, that's what I saw: Power was still getting to the motors obviously, as they were doing their sealing dance, but the switches had no effect, regardless of key position or engine running. So, I took the master switch out and tested it for continuity and signal. I put my DMM on multiple pin combinations and got a change in resistance or signal for every switch action I performed, so I assumed the switch to be fully functional.
Then, I check voltages at the female connector that goes to the master switch. The ground checked out as good, and the power in(the YEL/RED, I believe on pin 4) shows nothing. I check it against the ground for a short, nothing, so it's not shorted out. I check it for resistance and it shows 1k ohms. Does that mean anything specific? Does a known working YEL/RED circuit produce the same result?
I've checked the fuses in the rear compartment and all check out good, specifically 20 and 28. The power door locks still work from the master switch and the key fobs. The passenger side window switch does not work. So, the problem is contained to window operation circuit only. Again, the window motors have power as they still do the auto seal function. I've check the REM to look for loose wires or connectors and found nothing. I have yet to disconnect and reconnect all the plugs going into it yet, as I know that's something Ford actually suggests. I've read up on some other threads looking for similar issues/solutions, but have yet to find something that mimics this particular situation. The closest one I've found so far, that also has some great circuit info that I used to hunt this particular circuit down is this one: https://forums.fordthunderbirdforum...window-issue-tbird-2002-still-searching.5985/ But again, it's close, just not the exact same issue. So this is why I'm posting here.
So, experts, what do I check next? Are there some specific fuses in the other panels to check? Is there a relay in the trunk fuse panel that needs to be tested? I am completely open to ANY and ALL suggestions. I'm just about certain there's a simple fix to this, outside of the REM being bad on just that one specific circuit. The first thing she had to do when she got the Bird was to replace the FEM, I'd hate to have to replace or rebuild the REM, too, but I know that's most likely going to happen eventually anyway.
I await your expertise!
-Mike
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