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Re: 02 dodge caravan headlights
SOUNDS LIKE INTEGRATED POWER MODULE(UNDERHOOD FUSEBLOCK)IS DEFECTIVE..ALSO CHECK FOR CORRODED TERMINALS IN CONNECTORS ON FUSEBLOCK..HAVE SEEN THIS BEFORE AND NEW FUSEBLOCK WAS NEEDED AND REPAIRED PROBLEM
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Could be a contact, in the chain, not 100% in working order. It could lose contact by temperature, moisture or any other natural cause. Even contacts in a relay can be faulty and you should not rule out a relay what is clicking. Only measuring the resistance in the chain or the drop of voltage over a contact can bring you to the real cause.
Sounds like a wiring problem. You may need a repair book to track it all down. Could be a ground connection too.
The headlight switch sends power to the dimmer, then thru the body control module, then the high and low beam relays, then the four fuses, then the actual headlights. So you should have power on the low or high beam fuses depending on which way the dimmer switch is positioned.
The headlight relay provides power to the dimmer relay, then power goes thru a fuse for each light for each circuit (4). The low beam fuses are in fuse block 2. The dimmer relay is controlled by the daytime running light module. The headlight and dimmer switches send signals to the DRL module. You may need a shop manual to troubleshoot the circuits.
The headlight switch gets power for the headlights from a 50amp fuse. The fuse powers the headlight switch then the dimmer switch breaks for high and low beams. So if the high beams work, the problem may be with the dimmer switch. The dimmer switch is made into the turn signal switch on the column. You would need to check the low and high beam circuits at the switch for power.
Every single time I have had a failure of low beam in a headlight without failure of high beam, it has been because the lamp bulb or halogen lamp module has reached the end of its serviceable life, not because of any wiring problems. Low beam burns out first because it is on the most. If low beam is lost simultaneously in both headlights, I would check fuse first, then the headlight switch. If low beam is lost on one side only, it is almost always going to be due to the bulb or lamp module needing to be replaced. In that case, replace them in both headlights because the other one will be going kaput in short order, as well.Also if you already replaced the fuse and bulb check the headlight dimmer control switch. Thanks for using Fixya.
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.