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You have a problem with the daytime running lights system. It could be the sensor, relay or body control module. The sensor is on the top of the dash, there is a panel up there that pops of to access it. (be careful because they do break easily). The relay is in the under hood fuse panel. The BCM is under the dash. It could be one of these or just a bad connection at the BCM,relay, or sensor. These are the reason it flashes. When you turn the lights on manually, it bypasses all of this. Fixing this, you need a volt meter and wiring diagrams.
The headlight relay usually has one wire that is permanently live and switches that power when operating. Try another relay in case the contacts in the relay are stuck and there is some element of power being transferred.
it could be a wiring problem underneath the dash, i would recommend to check your fuses in the car first that would be the first and most cheapest fix. you may have a fuse that is about to go out, another cheap possible solution would be to check your relays in the vehicle first as well if it is a relay i would recommend going to a junk yard and getting the same make and model relays at a junk yard that you can pull the parts off yourself at.
COULD BE FAULTY DRL HEAD LIGHT RELAYS OR FAULTY DIMMER SWITCH.SINCE HEADLIGHTS TURN ON AUTOMATIC.TRY USING MANUAL HEAD LIGHT SWITCH ON TURN SIGNAL SWITCH LEVER SEE IF HEADLIGHTS STAY ON IF LIGHTS STAYS ON YOU HAVE FAULTY DRL HEADLIGHT RELAY.IF LIGHTS STILL FLICKER OFF.YOU HAVE BAD DIMMER SWITCH.
relay coil may be a bit weak and is sharing power with the headlight relay. Try swapping the relay with the horn relay or another similar one that is non-essential to operation of the car. If that doesn't work, you may have a loose wire on the headlight switch or at the relay socket.
right and left front fog lights do not have separate circuits, so that is a bulb or wiring issue.
Flickering is more likely the relay than the switch. Do the high beams flicker? They are on a different relay. I will paste the diagram, but the resolution will be poor :o(
Go to Autozone or Oreillys for a free scan of both the computer and the alternator. It sounds like a Regulator is bad. There reason it works well the first 10 minutes is that the battery is recharging and the Alternator is steadily charging via the Regulator. Then when the battery is charged the Regulator is tapering the charge and providing just the amount of energy your car needs.
This provides an off-on cycle which is the flicker you notice. It is not normal to show up and should be seamless. You may have the type of Alternator with a built-in Regulator and will have to open the Alternator or replace it to change the Regulator. There may also be a Headlight relay they mentioned, but if you notice the flickering in the overhead Dome light with the engine running at different speeds it is more likely the Regulator.
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