Headlights wont go out !!!
Thread Starter
|
Junior Member
Joined: Mar 2004
Posts: 5
Likes: 1
From: Raleigh, NC
Headlights wont go out !!!
I GREATLY NEED YOUR EXPERIENCED HELP !!
I have a 2002 F-150 Supercrew with the 5.4 liter engine, and my lights turned on, “ON THEIR OWN”, with the light switch in the OFF position, while I was sitting in the truck with the engine running. This happened about 15 minutes after I had jumped off someone with a dead battery. My truck does not have Daytime Running Lights, so this should not be due to a faulty DRL module. The lights stay on all the time, even with the engine off, light switch in off position, and key removed. The only way I can get the lights to go off is to disconnect the battery. So far, I have tested these things:
- Cycled light switch multiple times, headlights still on
- Battery voltage is 12.7 volts while not running
- Alternator is putting out 14.38 volts when running, so is not for lack of power not driving a relay somewhere
- Removed wire from rearview mirror light-dimming feature, replaced and selected “off”, no difference, has power to mirror
- Checked “every” below-dash fuse, and tapped relays (did not know how to check them)
- Checked “every” engine-bay fuse, and tapped relays (did not know how to check them)
- Removed light switch from dash wiring harness, headlights still on with no light switch installed
- Wires running to light switch and to fuse block do not appear to be melted or overheated
- Lights do go out when I remove the engine-bay fuse #3 (main light switch)
- Lights do go out when I remove the below-dash fuse #26 (Right side low beam headlight)
- However, the lights DO NOT go out when I remove the below-dash fuse #28 (Left side low beam headlight)
1. Why would the lights go out when I remove fuse #26 but not on fuse #28? Does one fuse feed the other?
2. Can I easily pull out the fuseblock to check wires and connections behind it?
3. What wire location and pin-out should I be testing next to track down the source, assuming it is a crossed or melted wire?
Please feel free to email me directly at my crackberry at: dell.west@honeywell.com
I have a 2002 F-150 Supercrew with the 5.4 liter engine, and my lights turned on, “ON THEIR OWN”, with the light switch in the OFF position, while I was sitting in the truck with the engine running. This happened about 15 minutes after I had jumped off someone with a dead battery. My truck does not have Daytime Running Lights, so this should not be due to a faulty DRL module. The lights stay on all the time, even with the engine off, light switch in off position, and key removed. The only way I can get the lights to go off is to disconnect the battery. So far, I have tested these things:
- Cycled light switch multiple times, headlights still on
- Battery voltage is 12.7 volts while not running
- Alternator is putting out 14.38 volts when running, so is not for lack of power not driving a relay somewhere
- Removed wire from rearview mirror light-dimming feature, replaced and selected “off”, no difference, has power to mirror
- Checked “every” below-dash fuse, and tapped relays (did not know how to check them)
- Checked “every” engine-bay fuse, and tapped relays (did not know how to check them)
- Removed light switch from dash wiring harness, headlights still on with no light switch installed
- Wires running to light switch and to fuse block do not appear to be melted or overheated
- Lights do go out when I remove the engine-bay fuse #3 (main light switch)
- Lights do go out when I remove the below-dash fuse #26 (Right side low beam headlight)
- However, the lights DO NOT go out when I remove the below-dash fuse #28 (Left side low beam headlight)
1. Why would the lights go out when I remove fuse #26 but not on fuse #28? Does one fuse feed the other?
2. Can I easily pull out the fuseblock to check wires and connections behind it?
3. What wire location and pin-out should I be testing next to track down the source, assuming it is a crossed or melted wire?
Please feel free to email me directly at my crackberry at: dell.west@honeywell.com
Thread Starter
|
Junior Member
Joined: Mar 2004
Posts: 5
Likes: 1
From: Raleigh, NC
FIXED! headlights wont go out
Sorry that I did not post the final solution to my problem of the headlights from 2011. I found the root cause was a metal relay on the fuse panel that was labeled "headlights". I could not tell if the relay was working, so I simply replaced it, and...walaah...the headlights went off. I think my action of jumping off someone with my jumper cables must have shorted the relay. I have had 3 people send me emails since 2011 with the same issue, and this also fixed their issue. Thanks, Dell.
