Fuses getting really hot November 01, 2009, 11:21:22 AM I know there are some mn-12 guys here so I figured I would post this question. In my 94 bird, my electric locks/power seats stopped working. I checked the 20a metal fuse, and both that one and the power window fuse is heating up really bad. The power windows still work, but the locks, power seats, trunk release, and gas door release aren't working. I tried replacing both fuses but they just heat up as well, but they aren't blowing. The fuses are still good. I have no clue what is going on, anybody got any ideas? Quote Selected
Fuses getting really hot Reply #1 – November 01, 2009, 11:31:52 AM the metal "fuses" are circuit breakers, they reset themselves and after a few times in a row, they get hot. sounds like something is drawing to much current or you have a short somewhere. Quote Selected
Fuses getting really hot Reply #2 – November 01, 2009, 11:40:36 AM Could there be a short somewhere inside the door panels? Like if a ground was unhooked or really loose? I don't have any aftermarket electronics besides a cd player, so I'm not sure what would be drawing too much current. Quote Selected
Fuses getting really hot Reply #3 – November 01, 2009, 11:45:07 AM And the breakers stay hot until I disconnect the battery. I can still hear the door lock actuator (I think thats what it is) when I press the lock/unlock button. I hear it clicking in the trunk. Quote Selected
Fuses getting really hot Reply #4 – November 01, 2009, 11:54:28 AM if they are staying hot whether or not your trying to use the particular items they control, sounds like a short. something may be pinched or rubbed through and touching metal Quote Selected
Fuses getting really hot Reply #5 – November 01, 2009, 12:48:00 PM I've checked every wire I can find, nothing is bare or touching metal. Quote Selected
Fuses getting really hot Reply #6 – November 01, 2009, 01:04:04 PM stick a 20 amp regular fuse in it and see how long it takes it to blow Quote Selected
Fuses getting really hot Reply #7 – November 01, 2009, 01:16:46 PM It blew about 3 seconds after I put it in.... Quote Selected
Fuses getting really hot Reply #8 – November 01, 2009, 01:23:33 PM Ok, so after the fuse blew, I put the breaker circuit back in and WTF??? It started working.......Now the fuse is hot and it won't work again...... Quote Selected
Fuses getting really hot Reply #9 – November 01, 2009, 01:53:46 PM It would work until it got hot again. They're bimetal spring type breakers. Much like the standard flasher relays. You have an abnormal current draw there, and you're going to have to find it. It's going to be a matter of disconnecting each device to see if that's where the current draw is. It isn't a complete short circuit, but it's getting close. Either that, or the wire has enough impedance to keep it from snapping the 20A fuse immeditately. You can bet the wire with the problem is getting warm too. Here's where an IR camera does wonders, especially when coupled with a good EVTM. On the power windows, locks, trunk lock and fuel door, there shouldn't be any current draw until you press a button. That current draw is going to kill your battery too, if it doesn't catch the wiring on fire first. Something's shorted somewhere. It may well be one of the control switches, especially for the windows, since those are reversing switches that switch both positive and negative leads to the motors. Best find it, and find it soon. Quote Selected
Fuses getting really hot Reply #10 – November 01, 2009, 02:01:36 PM Could it be that the breaker was bad? When I first started trying to figure out the problem, I switched the 2 breakers with each other (power window control) and never switched them back. Well I replaced both breakers, and now they aren't getting hot and everything works fine. Usually by about five minutes of taking it out and putting it back in, it's scalding hot to the touch. The newbies have been in for around an hour now with no problem. Quote Selected
Fuses getting really hot Reply #11 – November 02, 2009, 01:17:02 AM Only time mine ever got hot was when I had a short. My seat track ran over its own wire. Quote Selected
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