I am having trouble with things cutting in and out the wipers, windows, inside lights and now the heater is staying on after I turn the truck off. I was told it was the ignition lock cylinder by some people I went to get one and was told the ignition lock cylinder would not cause it that it would be the multifunction switch witch one is the most likely problem
Ford Q&AAsk Your Question
1998 Ford F-150 Question: the heater stays on after u turn the truck off can it be multifunction switch
Answer #1bmdouble February 20, 2013, 22:50Master
A short to power concern. the multi-function switch will not affect the heater or blower motor in any way,nor the windows. The one problem that I have seen ALOT of is a faulty windshield seal on the driver's side causing water to leak down the a-pillar and down into the central junction (fuse) box under the driver's side of the dash,causing various short to power concerns.I usually remove the 2 connectors on the rear of it,you'll have to get a 10mm shallow socket and 1/4 ratchet to remove these connectors,then get a mirror and look into the area where they plug into and you'll probably see water or corrosion.
Answer #2pushrod February 21, 2013, 00:13Master
Possible ignition SWITCH (not lock cyl.) problem. But the inside light thing dont jive with that, so check out answer1.
Any problems with the way it runs?
Answer #3Greg's Orange Auto (14928 Answers) , Orange, CA - (714) 361-9386globalhelper February 21, 2013, 09:44Master
agree with #1 its an issue that effect fuse blk or hareness connection