Hey All...

Here's another one for you...

I'm having issues with my high beams.. Sometimes they work and sometimes they don't.. When they do work, I hear a "ka-chunk" coming from the engine compartment.. Audible even with the windows up and the radio on at a normal listening volume... I'm thinking I have a (very) bad relay in that engine compartment electrical panel...

Thanks!
-Eric

Here's a short description of the high beam system. Note that there is only 1 light source for high and low beam lamps - there is a plate that covers part of the reflector in low beam mode; it flips away for high beam mode. If BOTH headlamps lose their high beams it probably is a relay issue.

High Intensity Discharge (HID) High Beam Headlamps
Battery positive voltage is applied at all times to the coil and switched side of the high beam relay. Battery positive voltage is also applied at all times through the coil side of the low beam relay to the low beam relay control circuit, to the multifunction headlamp switch. When the multifunction headlamp switch is placed in the high beam position, battery positive voltage is applied through the high beam headlamp dimmer switch signal circuit to the BCM. The BCM then applies a ground to the high beam relay control circuit. This energizes the high beam relay, closing the switched side of the high beam relay, applying battery positive voltage to the Left and Right High Beam Fuses. Battery positive voltage is then applied from the High Beam Fuses through the high beam solenoid switched voltage supply circuit to the high beam solenoid assembly inside of the headlamp. This causes the solenoid to retract a plate partially covering the low beam headlamps and allowing the lamps to illuminate at full brightness.

Ah ok.. Yes the problem occurs with both headlamps.. I'll try changing out the relay for starters..

On another note, that's an interesting design for a headlamp system... pretty slick..