I was skeptical the first time I tried it. Turned on and worked. When you push on the lens cover the aft light comes on and goes off fine. That is an easy DIY fix, as is replacing the door switches. Interior light stays on ? I have had to disconnect this fixture to avoid draining batter. Is it possible that fixture needs to be R and R? i have replaced both front door plunger switches, the dome light on/off wheel and the interior lights and accessory module under the dash and all fuses are good. Plug n play. Check to make sure that all doors are closed completely, as a door that's open just a slight amount can trigger this light… Basically ford truck/excursion/whatever + dome light stays on = wd40. Dome light does not turn off. It sounds obvious, but having an open door is one of the most common culprits of a "door ajar" light. Then the time for turnoff became longer and longer and now it simply stays on. If the WD-40 fix does not turn off the light, we recommend having a mechanic take a look. The dome light stays on all the time. An easy way to diagnose this is to turn your dome light switch to "ON" position. The door doesn't have to be wide open for the light to come on. The worst thing that can happen, and it happened to me, is that the control box located in the right rear well (near the wheel) has gotten wet and is shorting out. 2002 F250 SuperDuty Lariat PSD 7.3 Crew Cab 4x4 302,000+ miles. The most common cause of this problem is when someone other than the driver uses the dome light or dimmer switch. The dome switch itself has been known to fail. When you rotate the wheel switch over the detent, all lights come on, but this single forward bulb on the driver side remains on, when lights are switched off again. When your car interior lights stop working, the best place to start is also the easiest fix. Check the wires connecting to your dome light lamp by removing the light bulb, pulling the connector out, and checking for any corrosion. I am working on a 1997 blazer four door. the dome lights still won't turn off unless i … This can leave the interior lights in a state where they no longer come on when you open the door. Start with the Dome Light or Dimmer Switch . The older and more Northern your truck the more likely corrosion has interfered with every electrical connection, regardless ever being touched. Yay. Step 5 – Check door jamb switch. For the GMT800 generation GMC and Chevy trucks, Silverado, Tahoe, Suburban, Yukon, Sierra. The forward bulb on the drivers side stays on while driving. A repair shop might do one of the following to fix it: Replace defective door switches or electrical components: One or more of your door ajar warning light switches may be broken or worn out, or could be causing a short in the system. 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