2004 Dodge Ram Pickup Vehicle Wiring Chart and Diagram MUST use relays. (2) Parking lights require a negative trigger thru a 330 or 1 ohm resistor. Headlights require a negative trigger thru a 1 ohm resistor. There is a rest resistance on the wire, so MUST use a relay to isolate away from the switch. (3) The LF door trigger is tan, and the LR door is tan/orange or purple/orange. 2004 Dodge ram 1500: Low beam left headlight would work Sep 29, 2008I have a 2004 Dodge ram 1500. Low beam left headlight would work sometimes and sometimes not, high beam was not affected by this problem. It quit for good the other night. Replaced the bulb but it still doesnt work. Put test light on it and it pulses the meter on low or high beam.
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