I have a 99 chevy Z-71 which now has no high beams. All other lights work correctly and if you click the dimmer switch the hi beam emblem in the gauge cluster lights up but no high beams. Any thoughts or can someone tell me the location of the high beam realy. Thanks
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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.
Sounds like your dimmer switch is stuck on or broken/worn out. Sometimes you can get it back by clicking your high beam switch in & out many times. If it frees up & switches back to lowbeam it will buy you time before you need to replace the dimmer switch. If not you will need to replace it right away.