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How did you check the bulbs?
There are seperatre bulbs for high and low beams.
Have you ever replaced the bulbs?
Did you replace them with High intensity bulbs?
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You could try replacing the daytime running light relays. It is worth a shot.
Here are the locations in the panel.
The relay panel and 13-position auxiliary relay panel are located in the driver side footwell, behind the lower instrument panel trim.
Relay location on the thirteen position auxiliary relay panel, above relay panel: 1 - Alarm System Light Flasher Relay (404) 2 - Alarm System Light Flasher Relay (200) 3 - Back-up Light Relay (53) 3 - Lock Relay for Starter (Theft Warning System) (185) 4 - Lock Relay for Starter (Clutch pedal Switch) (53) 7 - Daytime Running Lights Change-over Relay (173) 8 - Daytime Running Lights Change-over Relay (173) 8 - Heated Exterior Mirror Relay (53) 9 - Alarm Horn Relay (53)10 - Glow Plug Relay (180)10 - Third Speed Coolant Fan Control (FC) Relay (100)*11 - Park/Neutral Position (PNP) Relay (126) (175)12 - Power Supply (Terminal 30, B+) Relay (109)* Only applies to 1.8L turbo enginesRelay panel: 1 - Dual Horn Relay (53) 2 - Load Reduction Relay (18) (100) (213) 4 - Fuel Pump (FP) Relay (409) V - Wiper/Washer Intermittent Relay (192) (377) (389) VI - Wiper/Washer Intermittent Relay (192) (377) (389) NOTE Number in parentheses ( ) indicates production control number stamped on relay housing.