Hi Beam not working (next steps)
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New User
Joined: Oct 2005
Posts: 22
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From: Lincoln Park, MI
Hi Beam not working (next steps)
My 2000 EB had all the symptoms of the multi-function switch gone bad. Headlights work fine, but no Hi Beams. Driving with headlights on, the hi beam indicator on the dash would come on periodically, but headlights would still work. Hit the stalk & the indicator would turn off. So I assumed the switch was done. Last night, I replaced the multi-function switch & the Hi Beams still don't work. Everything seems to work right, regular beams & fog lights turnoff, just no hi beams. All fuses under the dash checkout ok. Is there a relay and/or larger fuse in the PDB under the hood?? I've checked the owners manual, but there doesn't appear to be a relay or fuse for hi beams? Also, checked the bulbs & they appear to be good... help...
Thanks,
Adam
Thanks,
Adam
Fleet Owner
Joined: Mar 2003
Posts: 24,724
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From: Blue Hill Township
Have you checked for voltage at the headlight connector? Also check your bulbs. It could be a bad bulb shorting the low beam to the high beam intermittently which would cause the indicator to go on. I would disconnect both headlights, turn them on and make sure that you are getting voltage at the connector. On a 9007 bulb looking at the vehicle connector with the flat side on the bottom the pins are arranged as follows:
High Ground Low
Make sure that is all correct and then put in 2 known good bulbs and check and see if everything works. If that doesn't fix it them you need to go further in the circuit. I'll see if I can get you a copy of the headlight circuit for that truck.
High Ground Low
Make sure that is all correct and then put in 2 known good bulbs and check and see if everything works. If that doesn't fix it them you need to go further in the circuit. I'll see if I can get you a copy of the headlight circuit for that truck.
Senior User
Joined: Aug 2003
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looked up a schematic for a 01 expedition headlights. shows a fuse 16 which is a 20amp fuse in the central junctin box for the high beams it is beteen the multi function switch and the headlights on the schematic and the high beam indicator is also after the fuse 16
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New User
Joined: Oct 2005
Posts: 22
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From: Lincoln Park, MI
Turns out the bulbs were HID & both filaments were on in low beam position. Bought a pair of Sylvania Ultra's & brights are working again. I didn't know about the HID's cuz I bought the truck back in March. Thanks for the tips!!
This raises another question about the HID lamps I replaced. Do some operate with two filaments or did the set I have go bad & short low & high together?
This raises another question about the HID lamps I replaced. Do some operate with two filaments or did the set I have go bad & short low & high together?
