Similar Problem with 2003 Dodge Ram 1500. Speedo not working, ABS and Brake lights on, A/C and Defrost buttons not working, All heater controls except blower useless, and cruise not working. Started after I left the driver's window down in a rainstorm (accidentally). At first glance, no apparently wet/corroded wires. Where to start?

Hi Javier, Im AL the owner of Big As Auto Repair

Javier, ABS Module is located under the hood. It mounts to the side of the hydraulic brake system. Hope this helps and please visit my auto-repair website and check out the satisfied customers and give me a shout while your there. http://www.bigasautorepair.com/

ABS and Brake warning lights intermittent may be caused by a failing wheel speed sensor(ABS Sensor) and /or its connector. You may have one on each wheel hub(4WD) or if 2WD, a sensor may be on the rear axle differential center.

Double check all the fuse in the fuse box under the hood.

-David

could be, check brake fluid, if you have computer scaned you will be able to pinpoint problem, may be a sensor dirty or going bad, good luck.

Problem: I have a 2004 Dodge Ram 1500 5.7 L HEMI. My ABS and Parking Brake lights were illuminated, and my speedometer needle would "bounce". Also when sitting at a stop sign or just sitting idle, the engine would stall, and often times stop running.

Solution: After long research on this problem, I decided to dig in and try to find the problem myself. I replaced the Rear ABS Sensor
($35) that's located on top of the rear differential. Still no fix. I then unplugged the ABS Controller (or Module) that's located directly behind the battery (You should see the metal brake lines running into the top of it.) When I unplugged it, I noticed LOTS of moisture in the plug. Using an air hose, I blew out the water and let it dry good. When I plugged it back in, and hooked the negative battery terminal back up THE PROBLEM WAS SOLVED!! Simple fix. Hope this helps.

have you tried to replace the speed sensor in the rear end my 99 durango did basically the same thing speedo wasnt working right brake lights on dash check engine light on

Probably either your PCM or Vechile Speed Sensor. The VSS sends an AC (alternating current or sine) wave to the PCM and according to the frequency of the wave, tells the PCM the speed with which the vehicle is moving. It will be mounted to your transaxle, and I would look into this before the PCM.

The brake and ABS light both come on when you are receiving no speed signal. Most likely the speed sensor in the top of the rearend is bad.

IIRC, the speedo reads off of the sensor in the center section of the rearend. Also controls ABS. Hope this helps!

No definately the speedo....