Low beams won't come on. High beams come on only while column switch is held, otherwise they are off like low beams. PCM relays appear okay (switched them with other circuilts and no change.) Parking and tail lights stay on - even with key off. Have to pull PCM fuse to kill them. Dome lights stay on unless dimmer switch (wheel) is all the way in FULL OFF position. Any other position, dome lights are ON, even with key off. I haven't waited to see if dome and parking lights turn off by timer after key is turned off. Is there a fuse to/from the BCM that would cause this? Fuses and relays in the PDC all appear okay.
SOURCE: headlight Problem - 1992 Plymouth Voyager
check and see if the dimmer switch is working, it's most likely stuck. it might also be the headlight relay.
SOURCE: no low beam headlights on a 1998 plymouth neon,
Power may not be arriving at the switch check red/white wire coming to switch with a tester. If it doesn't have red/white check the thicker wires coming to it and make sure to check all the fuses in the engine compartment fuse box and the one in the driver kick panel area. On those may be a panel in between the driver door and left end of dash. Check any fuses mentioning HL Headlight Lamps etc. to assure they have 12v coming to the fuse. If not could be main fuse or fusible link.
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