I have a 2001 Ford Ranger XLT 2.3L RWD AUTO.
I've never had this problem but now I can hear what appears to be a electrical noise or grind/whine. This just started happening on Monday. Prior to that I've never heard nor seen my speedometer bounce like this.
I've read that it's the rear diff ABS sensor possibly going bad. So I should have a new one tomorrow via amazon. I have also read that it's possibly the battery? I know the previous owner said he replaced the battery but this was at LEAST 2 years ago. So I know there is a solid 24 months on the battery now, since I've owned the truck...
I've also read that it might be the speedo? These actually go bad? Makes me wonder because of the noise you can hear towards the end like a whine noise. I have noticed that the battery gauge looks a little lower than before... normally it would be at around the MIDDLE of the battery icon and as you can see in the pic it's not now... however, the truck starts up perfectly fine, no hesitation at all or trouble, or having to do it multiple times.. so that makes me wonder is it really the battery?
I have projector HIDS and LEDS inside and have had them for at least a year now, I've noticed today pulling in the garage that the right hid was not flickering on and off persay but the beam wasn't steady like it was.. it was kinda dimming a little along with the interior cabin LEDS.... Battery? Alternator? I'm truely at a loss.
I've also heard there are sensors on the transmission that dictate the speed to the speedometer, problem is I don't know which ones to get.. I don't mind replacing all of them as long as this STOPS.
I did change my rotors and pads, and calipers. This was friday and this didn't happen. I will note that my ABS light is not on nor is it flickering so it makes me wonder as well if that sensor in the rear is bad? I didn't see any bare wires everything is taped and loomed, so I don't think anyone cut the wires back there that I could see at all...
Attached the picture of the battery gauge. And link to the video that I took with my phone...
Any help would be great.... this is truely driving me nuts.