The other day I noticed that my left side, sealed beam headlight wasn't working on either high and low but the right side was. I forgot to check high vs. low on the right side. I haven't been driving at night so I have no idea when it failed.

I purchased two replacement sealed beam lamps, H6054 since Autozone didn't have the H5054s specified in my owners manual. The lamp I removed from the left side was an H6054 but I haven't checked the right side. I installed the new left side lamp. When I turned on the headlight switch to test it, not only did it not work (high and low) but the previously working right side wasn't either (high and low). I haven't yet replaced the right side. In addition:

A. The parking and tail lights work fine.
C. The high beam indicator lights up but does so in both the high and low beam positions of the turn signal lever.
D. Using my multimeter, I checked the connector on the left side and couldn't find any voltage present with the headlight switch was on.

I've checked the following fuses both visually and with a multimeter and all are OK:

Passenger Compartment Fuse Panel

#6 Brake-shift interlock, Daytime Running Lamps (DRL) module

#10 Main light switch, Park lamps, License lamp (external lamps), Multi
function switch (flash-to-pass)

#25 Left headlamp (low beam)

#30 Headlamps (high beam indicator)

#31 Right headlamp (low beam)

Power Distribution Box (under the hood)- Since all these larger fuses have exposed terminal ends, I checked all of them with a multimeter and all are OK.

I have yet to check the headlight switch and will, but I was wondering if there is any other single point of failure that I've missed that could affect both the right and left headlights as described.

I'm hoping there's a simple fix since I really don't want to take it in to the local Ford dealer and pay them hours of labor to troubleshoot it.

Thanks.
__________________
Bob
2005 E350 Super Duty Ext Wheelchair Van

 

I hope that you have found out what's going on by now. I have a similar issue. I traced the wiring from the headlights and with my Ohmmeter I discovered that the high beam circuit has a short to ground somewhere. I may have a look at the headlamp switch in the coming days.

 

After many hours I gave up and took it to my local Ford dealer. It turned out to be a problem within the wiring harness. I'm not sure if they said it was a short or a break. Nonetheless, the labor bill was very high and the total for the repair was about $700. I probably should have spent more time on it. I probably should have spent more time on it but it's getting hot here and I have a lot more things to do. I don't know if it's any help to you since your van is a 1998, but I section 417-01-01 of the 2004 workshop manual has a headlamp troubleshooting guide: Sportsmobile & Ford E-Series Van Manuals

 

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