You are watching: 2004 chevy impala headlights not working
Hello, This problem sound like it is a headlight relay has gone out, here is a diagram (BELOW) and a guide to help you get the problem fixed. Also check the system fuses.https://www.nadechworld.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuitandhttps://www.nadechworld.com/articles/how-to-check-a-car-fusePlease run some tests and get back to us so we can continue helping you.Cheers, Ken
I Replaced the high beam bulbs in my car to plug it in and now the low beams are not working idk if I blew a fuse or what I cannot find the appropriate fuse for the low beams to see if it even needs replaced and to top it off I have work in the morning
Electrical problem2004 Chevy Impala 6 cyl Front Wheel Drive Automatic I have no day time runners or low beams.I replaced the dimmer switch and checked the fuses and still no lights. Please any advise would be much appreciated!
See more: How Much Does A Gallon Of Oil Weight, How Much Does A Gallon Of Oil Weigh
Welcome to the forum, the quickest way, may be to have all trouble codes checked, manufacturer specific, everything. See if the codes point to anything? When you check a fuse, you also need to use a testlite, see if fuse circuit is hot. Even if the fuse is good, if there is no voltage, the circuit is dead.On and off, bright and dim are controled on the headlamp ground circuit. There is a headlamp relay in the left instrument panel junction block. When the relay is energized, it completes the ground circuit for the headlamp. There is voltage to coil side of relay, not sure if that is battery voltage, didn"t track the circuit, use a dmm. The BCM grounds the coil side of relay. The headlamp switch grounds a signal from the BCM, that is how the bcm knows the switch was turned on. Just speaking for myself, without a code or something to point us in the right direction, it"s hunt and peck the wiring circuits.