Headlights won't come on. no previous issues. went out to use van at night no headlights. I don't have a manual for the 98. I looked in the owners manual for my 2000 E350 it listed two fueses number 10 on the inside panel and number 15 on the under hood power dist. box. both checked ok. pulled one headlight bulb looked good, checked continuty, ok. parking lights come on ok.tail lights come on ok with parking lights. any ideas? [email protected]
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Re: E 350 headlights won't come on
If you've narrowed it down that far, it sounds like either a headlight relay (not all vehicles have them, but some do) or the switch itself. It would be worth getting a Haynes manual at this point (they're about $19 at a parts store) - that'll show you locations of any relays as well as wiring diagrams and how to disassemble a lot of the vehicle, in the event you have to replace the switch itself.
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For more than a decade, GM used wiring for the headlights that barely met the amperage requirements for stock headlights. When owners replaced stock headlights with upgrades, the wires would simply fry.
The only real solution is to run NEW 10AWG (or 8AWG) wires from the headlight switch (or automatic headlight relay) all the way to the headlight connectors. (You can follow the extant routing of wires.) Best of luck to you!
If you are stating the headlights only work while in gear (during the day or night) then they are your daytime running lights. Don;t know if you vehicle has automatic headlights or a manual switch. If you are stating you turn the headlights on and they only illuminate while in gear then there are other issues. Let me know