1996 Ford Ranger Pick-up Malfunction - Electrical & Lighting Systems

Question: Instrument Cluster Lights and AC control lights went out. Fuses check good. Dome/courtesy lights still work. Headlights/tailights/blinkers etc. still work. Don't know if it matters...dome light has been staying on a long time afer shutting truck down and sometimes even when driving...usually on hot days. Any ideas where to start? Any "modules" that should be checked/replaced? BobK

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Technican: I would start with the switch (instrument cluster brightness). Be sure you have checked all relevant fuses. Sometimes its quicker to check them all (preferably with a test light so we know there is current flow).

Owner: Thanks for quick reply. Fuses good. Will pull switch and check this weekend and let you know. Switch/Roller still will turn domelight on but does feel a little "too smooth" when rolling up or down. Dome light and buzzer still stay on a looong time after starting /driving. sometime 10 min. or more?

Owner: Switch was bad. Installed new one and all is well. Thanks!

Owner: Dash Lights work fine now but dome light and Buzzer still stay on a looong time after starting/driving. Seems to last longer when weather warm.

Technican: What is the buzzer for, is this the buzzer that activate when the door is ajar? Which engine do you have?

Owner: Yes the door buzzer and domelight stay on foreeeeever, especially during hot and hmid weather. Winter no problem...work as normal. Does the same with either door. Bobk

Technican: Have you tried lubricating the door switches-do this by spraying lubricant such as WD40 around/behind the door latches. Move the handles up and down several times to work the spray in. Hopefully it's simply these switches bothering, they are notorious for problems. Let me know if this helps.

Owner: Did it this weekend. Seems to have helped but the weather has been cool. Won't really know until it warms back up into the 80's. Dash lights still working well. BobK

Technican: "Warms back up into the 80's" Sounds nice, it's forecast to warm back up into the 20's here. Don't be afraid to give another 'treatment' for good measure. Did both doors start bothering at the same time, or one then the other?

Owner: I say at the same time. The Wife says Drivers door got bad first then passenger door. I have sprayed both doors a couple times and so far...so good. Thanks.

Technican: It's been a while, I wanted to follow up and see how things are going with your truck.

Owner: Thanks. Haven't driven the truck too much lately but did notice, on a hot day last week, that the dome light stayed on 10 mins. Again....in cooler weather....it's never a problem. Seems to react the same when either door is opened. BobK

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