My break lights are not working at night, they work during the day when my head lights are not on. I have changed the fuse and the bulbs?

assuming the 2000 is same as 2001-2002, the headlight system runs upon firing engine and they stay on... doesn't make sense , if headlights work during day light and don't during night time,check your light switch , move it around , wiggle etc.. if no diff. , check head light sensor and did you know there are like 3 or 4 diff. fuse box's , there is one in the dash!!!, driver side i believce , good luck

Probly the wiring to it has resistence from wear. Or the switch

just on the dash right....... because your dash lights turned on and it changes the brightness of the dash lights, try rolling the little wheel down on the left and see if there is a change?

on the other hand if the outside blinker light fails to work at night the bulb might be burned out you should check it and the dash light might not work if bulb is burned
just turn on the lights turn on the key and blinker and go look?

did you change the correct fuses! Locate the fuses in slot 22 and 23. they are in the underhood fuse box. drivers side left. Good-Day! you may also have a bad ground on tail lights.

Under hood fuse box. There will be a parking light fuse that will be for the outside and inside lights

The headlight bulb is defective.

You probably already know this, however the GMC 2002 Yukon Denali uses the Wagner 3157 (or equivalent) dual element bulb. The running light uses one element whereas the brake & blinker share the other element that burns brighter.

Check to ensure the correct bulbs are being used. Then check all wire harness connections. Since the blinkers function, then it sounds like the connections are good.

It really sounds like there is a bulb issue, so check that first, then let us know the results.

check connections and fuse for taillights

the problem is not the bulb it is the connectors the bulb is connected to...rebend them so they touch....its happening on all the 2000 jeeps...email me for any more [email protected]

I have a problem with my tail lights in my mazda. Brake lights working great but the light that supposed to be working during night time are not. By the way the front lights are working too! Also the light of the panel inside is not working. Can anyone please tell me how to fix it?
Thanks alot in advance!