Radio / Other Systems Won't Shut Off

Asked by Sep 15, 2016 at 12:54 AM about the 1998 Ford F-150 STD LB

Question type: Maintenance & Repair

Over the past few weeks my truck has been draining its battery while I let it
sit (sometimes for just a half hour or so). When I remove my key I know the
battery stays connected because my radio won't shut off (only sometimes),
the passenger airbag light will flicker, and I hear a clicking sound (that
makes the same sound as the hazard lights but with no particular rhythm)
underneath the dash with my theft light flickering. When I come back to my
truck (even overnight) sometimes it will start and sometimes it will die. On
top of that, I do not know if it has anything to do with it, my gauges won't
come on for 10-15 seconds and the warning lights on my dash won't work
except for the first 5 seconds of start-up. I replaced my ignition cylinder
because it froze up at the same time that this started happening. Thinking it
is a short somewhere but do not know where to start or any other
suggestions? (Alternator is about a year and a half old and upgraded,
battery is probably about the same age).

2 Answers

16,690

If the problem is intermittent and affecting the radio and other components, determine if you have an accessory relay in the fuse box. If so, remove and replace. They are not that expensive. The relay should shut off the power to those systems after a certain amount of time, if your vehicle is so equipped.

16,690

Also, check your owners manual's radio section. If there is a relay it should say something like; your radio will stay on for "X" number of minutes after the ignition is switched to "off" if the key remains in the ignition and drivers door is not opened.

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