Grand Cherokee 1999 - ABS light went on solid ?

Check brake fluid level. If OK but the light is still on, check the parking brake switch. Check also the wear of the brake pads.

I would not be concerned so much with the ABS light, but the brake light needs to be investigated-does the petal feel the same? Is the brake fluid full? If both are alright, you only do not have ABS, which is not as critical, but if you have any issues with a different petal feel or low on brake fluid, it needs to be looked at immediatly.

JEEP VECHICLES 2001 MODELS AND UP HAS TO BE BLED USING A DRB BLEED TOOL.YOU HAVE TOW VECHICLE IN.MOST TIME YOU CAN TRY MANUAL BLEEDING BUT BRAKES WILL BE SPONGY AND ABS LIGHTS WILL TURN ON.THE DEALERSHIP HAS TO BLEED IN ORDER TO GET GOOD SOLID BRAKES AGAIN.

Brake system fault. Must troubleshoot. Recommend starting with brake fluid reservoir. Then check all brakes for leaks.

CHECK TO SEE IF YOU HAVE TRANSMISSION FLUID ON FRONT BRAKE ROTOR OR BRAKE PADS.IF BRAKES CONTAMINATED THE TRAC LIGHT AND ABS LIGHT WILL COME ON.IF ALL LOOKS GOOD LET DEALERSHIP CHECK OUT THE ABS BRAKES AND TRAC SYSTEM.THEY HAVE TO USE DIAGNOSTIC EQUIPMENT TO FIX THE PROBLEM.

it is problem with abs control unit, replace it for testing purpose and try it.

first of all make sure master cylinder is full of brake fluid.then you crank car leave foot off brake pedal. watch abs light on dash it should turn off in 10 seconds if not have car towed to garage or dealer. they have to use a scanner to scan the abs brakes if abs light turn off in 3 seconds. then starting bleeding from master bleed the lower brake line fitting at the proportional valve followed by the upper brake line fitting. keep eye on brake fluid in mastercylinder dont let run dry.next prime the abs hydralic modulator.connect the bleeder hose to the rear bleeder valve on the modulator.place the other end into a container partially filled with cleab brake fluid.make sure the end of the hose is submerged.open the bleeder valve slowly about 1/2 to 3/4 turn have an assistant depress the brake pedal and hold it in the depressed position. when the flow of fluid ceases close the bleeder valve.repeat process until no air bubbles are present in the fluid.then tighten the bleed valve securely. start bleeding brakes. your bleeding sequence is right rear - left front - left rear - right front.WARNING IF ALL FAILS YOUR BRAKES DONT FEEL SOLID AND FEEL VERY SPONGY.DONT DRIVE CAR. HAVE IT TOWED TO DEALERSHIP.THEY WILL HAVE TO PRESSURE BLEED YOUR BRAKE SYSTEM.

try to disconect the batery it will reset the computer if the abs light doesnt go off then check your brakes

abs sensor wire

actually it could be something as simple as low on brake fluid. check this and then check to make sure you do not have worn brake pads on the tires this can also set a code when one tire stops quicker than the other