1990 Ford Thunderbird Malfunction - Windows & Glass


Question: I need to diagnose a power lock/power seat problem with this Super Coupe. Both functions will work, but blow a fuse in about 2 days. I replaced it with a circuit breaker, but it does get very hot, and I was afraid to leave it in. I just leave the seat in one position all the time, but now I am going to sell the vehicle and would like to fix it. Thanks

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Technican: Hello, Have you considered simply disconnecting the power seat switch and see if your short goes away? The switch could be sticking and allow enough transient voltage through to have a slow burn effect on the fuse element. Do you have an ammeter? We can test for parasitic drains on the battery and isolate the trouble that way. Simply connect the ammeter in series between the disconnected negative battery cable end and the negative post of the battery. The ammeter must support at least 10amps dc to make this test or the fuse inside the ammeter will blow. Once the ammeter is in place you can disconnect components on the circuits until the drain is gone. Parasitic drain of up to 35 miliamps is allowable and normal. Thoughts?,
Owner: i really haven't started to trouble shoot this at all because i haven't had time. i thought i would isolate the components as you said and determine the problem. i thought maybe you had seen this before and maybe could save me some time....i was hoping it was as common a problem as a 3.8L head gasket or an old Taurus tranny! Thanks
Technican: No, not really that common! Do you have an ammeter? I want to help.
Owner: yes, i have an ammeter. thanks for your help. Rick
Technican: Great! Let me know what happens and what you need.
Technican: Hello? Still active here? Thanks.
Owner: yep......i've just had to put that isssue on the back burner for awhile....i've got 6 vehicles around here and had more important things to take care of. thanks, rick
Technican: Thank you for the update. I try to keep up.
Technican: Hello, any change in the status of this question? Just checking in with you,

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