What is wrong with a 1998 Dodge Ram when the abs and brake lights are on?
Another thing to consider is whether or not the speedometer works at low speeds. If it doesn’t read anything until about 25 mph, check the sensor on the top of the rear differential. It should show about 750 ohms if it is good. These are a known issue on Dodge trucks and generally show as an open circuit when they are bad. It is about a 10 minute job for the diy mechanic.
