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Re: Low Beam Headlights are dim to non existant
Hi and welcome to FixYa,
Offhand could think of only three (3) possibilities:
loose ground, you can try determine which of the 3 wires going to the bulb is the ground and then temporarily splice a short piece of electrical wire and connect the other end to the car's exposed metal part;
headlight switch, you can try checking with a voltmeter if the +12 going to the dim filament goes down after some time. If it does then it would be the headlight switch or relay if one is used;
connectors/terminals, those leading to the headlight should be checked, might be loose or corroded.
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Before you replace the #46 HDM relay (in the fuse block under the hood) try exchanging it with the #45 cooling fan relay and see if your low beam lights work. If they do, the HDM relay (actually solid state module, not a relay) is bad.
Check your connections at the wiring harness going to headlights for corrosion, sounds like high resistance somewhere, also make sure your ground wires are secure. It wouldn't be the alternator or the battery would be dead and not start the engine. Also shouldn't be any condensation in your head light assembly's or will cause bulbs to blow prematurely.
On the van you have a high beam fuse and relay. On the low beam you also have a fuse and relay. Check the fuse/relay panel for a blown fuse controlling the low beam lights. If you do not find a blown fuse have some one to turn the key on and turn on the high beam lights> During this time locate the low beam headlight relay and place your finger on top of relay, have the other person to switch from high beam to low beam lights. You should feel a click in the relay when they make the switch from high to low beam. If not replace the relay and the problem should go away. Hope this will help you.
I had the same problem with my 2001 Forester. Try this as a low-cost and easy repair attempt: buy brand new fuses and replace both L/H and R/H fuses. If one of your fuses is marginal, your headlights will exhibit this problem. Replacing my headlight fuses with brand new ones solved my situation.
I have a 2004 ram 2500 and all my lights work except for low beams. It is not in the switch, I haver replaced the switch with no change. This is a circuit problem with these dodge pickups. I haven't firgured out what it is but it isn't the switch. and unless the low beams and high beams are fused seperate, it isn't a fuse problem either. i have looked for a fuse and can't even find the fuse for the headlights. Im lost like you!