ABS light and brake light are on

I suspect you have rear wheel ABS and if you do I think your issue is the sequence and components you are bleeding. I would bench bleed the master cylinder and then the combination valve and then the rest of the list.

Take a look at this guide and the attached info. Let me know what questions you have. Thanks

https://youtu.be/ye64wlARgcs

https://youtu.be/w7gUsj2us0U

Hi,

You need to bleed things in a specific sequence. If you started at the front, it won't work. Here are the directions specific to your vehicle. Note that they provide directions for manual bleeding, vacuum bleeding, and pressure bleeding. Make sure to follow the sequence recommended as well as the combination valve and the rear anti lock valve.

Also, this is for a vehicle with rear anti lock only. If you have 4 wheel anti-lock, let me know.

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1997 Dodge or Ram Truck RAM 1500 Truck 4WD V8-5.2L VIN Y
W/ Rear Wheel Anti-lock Brakes
Vehicle Brakes and Traction Control Hydraulic System Brake Bleeding Service and Repair Procedures Anti-lock Brake System Bleeding Procedures W/ Rear Wheel Anti-lock Brakes
W/ REAR WHEEL ANTI-LOCK BRAKES
RWAL BRAKE BLEEDING
Rear Wheel Anti-lock (RWAL) brake bleeding can be performed manually, or with vacuum/pressure equipment. Bleed only one brake component at a time. Recommended bleed sequence is:
1. Master cylinder.
2. Combination valve.
3. Rear anti-lock valve.
4. Left rear wheel.
5. Right rear wheel.
6. Right front wheel.
7. Left front wheel.

Use Mopar DOT 3 brake fluid, or an equivalent meeting SAE J1703-F and DOT 3 standards, to fill and bleed the system. Use a bleed hose at each caliper/cylinder bleed screw. Attach one end of the hose to the bleed screw and insert the opposite end in glass container partially filled with brake fluid. A glass container makes it easier to see air bubbles as they exit the bleed hose. Be sure the end of the bleed hose remains immersed in fluid. This prevents air from being drawn back into the system. Do not allow the master cylinder to run out of fluid when bleeding the brakes. An empty cylinder will allow air to be drawn back into the system. Check fluid level frequently during bleeding operations. Be sure to tighten each brake line fitting, or bleed screw once bleeding is completed. Loose fittings and bleed screws allow air to enter the system.

VACUUM BLEEDING
If vacuum bleeding equipment is being used, it is not necessary to hold the front brake metering valve open. Simply bleed the brakes following the bleed equipment manufacturers instructions.

PRESSURE BLEEDING
If pressure bleeding equipment will be used, the front brake metering valve will have to be held open to bleed the front brakes. The valve stem is located in the forward end of the combination valve. The stem must either be pressed inward, or held outward slightly. A spring clip tool or helper is needed to hold the valve stem in position. Follow the manufacturer's instructions carefully when using pressure equipment. Do not exceed the tank manufacturers pressure recommendations. Generally, a tank pressure of 15-20 psi is more than sufficient for bleeding purposes. Fill the bleeder tank with recommended fluid and purge air from the tank lines before bleeding. Do not pressure bleed without a proper master cylinder adapter. The wrong adapter can lead to leakage or drawing air back into the system. Make sure the front brake metering valve in the combination valve is held open. A spring clip tool is best for securing the valve stem in an open position.

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Let me know if this helps or if you have other questions.

Take care,
Joe

Hi,

You are very welcome. If you get a chance, let me know if it helps.

As far as bench bleeding the master cylinder, here are the directions for "bench Bleeding." Since you already have it on the truck, simply disconnect the brake lines and have a helper slowly pump the brake pedal in the vehicle while you make sure the fluid is being recirculated back into the reservoir. Don't let me any brake fluid get on a painted area. It will damage the paint.

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1997 Dodge or Ram Truck RAM 1500 Truck 4WD V8-5.2L VIN Y
Bench Bleeding
Vehicle Brakes and Traction Control Hydraulic System Brake Master Cylinder Service and Repair Procedures Master Cylinder Bleeding Bench Bleeding
BENCH BLEEDING
Master Cylinder Bleeding

See pic 1

PROCEDURE
An overhauled, or new master cylinder should always be bled before installation in the vehicle. This practice saves time during brake bleeding because air in the cylinder will not be pumped into the lines. The only tools needed for bench bleeding are a vise, a pair of bleed tubes, and a length of wood dowel. Bleed tubes can either be purchased or fabricated from spare brake lines and fittings.
1. Mount master cylinder in vise. Clamp vise jaws on one of the cylinder mounting ears.
2. Install bleed tubes in cylinder outlet ports and direct tube ends into appropriate reservoir chambers.
3. Fill reservoir chambers about 3/4 full with fresh, clean brake fluid.
4. Bleed cylinder by stroking cylinder pistons inward then allowing them to return under spring pressure. Use a wood dowel, or similar tool to stroke pistons.
5. Continue stroking pistons until bubbles no longer appear in fluid entering reservoir.
6. Remove bleed tubes and install plastic plugs in cylinder outlet ports. Plugs will prevent fluid loss and keep dirt out until cylinder assembly is ready for installation.
7. Top off reservoir fluid level and install cover and seal.

CAUTION: Be sure the seal is properly positioned on the reservoir cover. The seal can shift out of position during installation if care is not exercised. This will result in leakage and possible fluid contamination.

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Also, let me know if you have other questions.

Take care,
Joe

Hi,

See above directions. No special tools other than hoses that can recirculate the fluid back into the reservoir. See the aforementioned directions and pic.

Also, here is a link you may find helpful. It also discusses bench bleeding.

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

Let me know if I can help.

Joe