I investigated a problem in which my tail lights would not illuminate, and eventually discovered that a yellow relay on the drivers side of the trunk, hidden behind the trunk liner near the trunk hinge was at fault.

I replaced it, and discovered that my headlights now no longer work. At first, I though the new relay might be the problem, but I don't think that this particular relay has anything to do with the headlight circuit.

One clue is that, though both the normal and high beam positions on the switch give no love, if I hold the headlight switch in the "flash high beam" position, then the high beam lamps work (rather inconvenient, not too safe, and definitely impolite to drive this way!).

Could it be the relay (I doubt it, since I don't think that relay is related to headlights)?
How about the headlight switch (unlikely, since it worked perfectly right before my relay-replacement project)?
What about one or more fuses and/or relays (this seems most likely, but I'm not an expert)? There are so many fuse and relay panels all over the casr, in rather illogical places. There are only so many things it could be, especially given the clue that the flash high beam function works.

Please help!

Thanks!

Jason Wren
Denver, CO

 

Welcome to YotaTech.... did the headlights work before messing with the tail lights .... also what kind of car or truck do u have