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Electrical problems..Ignition?

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Old Jan 12, 2015 | 05:04 PM
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Electrical problems..Ignition?

Started having some issues with my 01 supercrew last night. The doors would not lock with the key fob. I thought maybe the battery was bad in the key fob and tried it a few times later on with intermittent results. I did notice a noise coming from underneath the dash after I had locked and unlocked the doors.It carried on for about 5 seconds or so and then stopped. This morning my battery was completely dead. I suspected something to do with the locks but after I boosted it and got it running I noticed the fan on the heater motor continued to keep running even after I had turned off the ignition! Any ideas what the heck is going on?
 
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Old Jan 12, 2015 | 05:43 PM
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Are you sure it is the heater fan blowing or the fan for the CD player behind the radio. I know if your vehicle battery is low the door locks will sometimes cycle up and down for no reason. Just been thru some of this stuff lately myself.
 
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Old Jan 12, 2015 | 06:12 PM
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Yes definitely the blower motor. It was cranked on full blast and it kept right on running after I shut off the ignition.
 
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Old Jan 12, 2015 | 07:11 PM
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Does the radio work also? I'm thinking maybe the ignition switch is going to the Acc. position also when you turn it off.
 
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Old Jan 12, 2015 | 08:04 PM
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I didn't try the radio as I had all systems turned off trying to get the battery charged. I didn't notice the clock on though so I think the radio shut down ok.
I just went out for a little test drive to try out my new thermostat.When I got home and turned off the key everything seems to be working normally again.Even the locks. However I sat in the truck for a minute afterwards and the ticking sound from below the dash is still there.
 
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Old Jan 13, 2015 | 06:49 AM
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Where are you at? Has it been raining (or melting snow) a lot?

Your symptoms are ones that are often seen when the windshield leaks into the GEM module (Leaky Windshield Syndrome) or fuse box.
 
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Old Jan 13, 2015 | 06:50 AM
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I would guess yours has a battery saver circuit? That stays active for IIRC about 45 minutes after you shut it off. I would guess there is a relay for that, but where it's at I have no clue. Just tossing this out.
 
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Old Jan 13, 2015 | 02:05 PM
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I am in Ontario,Canada..It has been snowing a bit .Haven't noticed any water in the cab.
 
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Old Jan 13, 2015 | 03:08 PM
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I found this thread while searching. I am also having a dead battery every now and then and it drives me nuts looking for what can do it. I actually froze my battery one night when it was way below zero and it went dead....I mean DEAD. Read thru this...https://www.ford-trucks.com/forums/4...hut-off-2.html
 
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Old Jan 13, 2015 | 04:40 PM
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A dead battery will freeze at +20F, 100% charge good to -77F below.
 
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Old Jan 13, 2015 | 05:23 PM
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Originally Posted by Tedster9
A dead battery will freeze at +20F, 100% charge good to -77F below.

Yep....so I know..LOL. I can't believe how fast a dead battery will freeze.
 
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Old Jan 13, 2015 | 11:00 PM
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This is one reason why it can be problematic to try and jump start somebody. The manufacturers claim a frozen (partially?) battery can explode, don't know for sure, not inclined to test that. Probably not healthy for alternator either.
 
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