2003 Ram 1500 4X4 5.7 Liter V8

The air conditioner will not work, the speed odometer will not work, the Abs light is on all the time, the brake (dash) light is on all the time and the air bag light is on. The check engine light is also on.

Everything was working and all of a sudden all this happened at once. The truck runs fine.

Any idea's?

 

turn the key on(ignition NOT start), off, on, off, on and then look at the odometer... a few codes will show up. write them down and then search here and see what they mean. also the speedo and abs/brake light are the same fuse so check that also

 

Agree, definitely going to need those codes.

 

We tried to get the codes. None came up. Any other idea's?

 

Management light on should pull a code, ignition 3 times (finishing with ignition ON) should say "done" on odometer display if no codes or p0440 for example if fault.

 

Drive it to a auto parts store and let them connect a OBD scanner to the truck and get you the codes

 

Look at your battery, there should be a smaller wire fed in with your main positive cable, this wire reports the state of your alternator to your ecu, follow this wire and check its condition, sometimes it corrodes and causes a bad signal to be sent to the ecu, many times causing everything you just describes as your symptoms, i dont know a ton about the hemi but that is a common design for most manufacturers.

 

Thanks allot everyone. We were finally able to get the code. Looking at a speed sensor replacement. Thanks again.

 

i recently had a run in with the abs light, brake light, and speedometer not working. the codes were coming up with speed sensore and unable to communicate with abs module. it wound up being a 15A fuse in the main fuse block that dodge has labled as "spare" it was burned out.

 

Gotta love those "spare" fuses, LOL.

Had a trailer light problem with a Cheby Z71 where there were no running lights at all on the trailer. Checked wiring harness, all fuses the manual had for anything to do with trailer connector. Very common for a fuse to blow when you submerge a boat trailer. Re-wired the whole damn trailer the day before having to drive 110 miles to a bass tourney with NO success.
Ended up taking my ex's Grand Cherokee to trailer the boat to/from the tourney.

Couple days later I started just pulling fuses and checking them and one marked "spare" was blown. Replaced it and VIOLA! had trailer lights...