Just my speed guage does not work and abs light and parking brake light stay on on my 99 ram 1500

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.

Do you have a ABS Light at the same time?

I had a 2001 silverado 2500 h.d. with the same problems. I took it to a gear head and he found that the emergency brake cable was loose causing it to trigger the warning light on the dash. As far as the low fuel guage I took it back to the gear head and he found that the float in the gas tank was broken causing the low fuel light to come on. The float wasnt a big deal until I lost track of mileage and ran the tank dry.

Check brake fluid, also could be wheel speed sensor,try washing the wheels out real good and be sure to look behind wheel to see if any wires are hanging loose.
If not you need to have brake system checked

Verify that the ABS wheel speed sensors in the wheel hubs are operating properly. They tell the vehicle individual wheel speeds, and can be just as important as the vehicle speed sensor. Also, verify that the individual wiring connections are properly connected, and inspect the wiring.

Have you had the abs scanned? It is likely the speed sensor in the rear differential. It is a common problem on these.

Replace the speed sensor in the rear end.

most likiely is a wheel speed sensor for the abs system that hasf ailed

YOU MORE THAN LIKELY HAVE IT FIXED BY NOW BUT IT'S YOUR SPEED SENSOR. SAME THING HAPPENED TO MY 99 5 SPEED. ONCE IT WAS REPLACED IT RAN LIKE A CHAMP.

No definately the speedo....