Hi excellent video I’m in the same situation, same code and no built pressure in rear axle and voltage and grounds are fine in the same pins so replace the assembly? Does it work for you in your case?
I have 2007 4300 with hydraulic brakes. I changed out rotted brake lines, refilled and bled the brakes and now I have a warning light on (Brake Pressure!). When the truck is running the pedal feels a little stiff and the hydroboost motor stays on constantly. If I unplug the relay to the hydroboost, the brakes feel normal and the Brake Pressure! Warning light goes off. I'm stumped. Power steering fluid is topped off too. Not sure where to go from here
@@commenter5469 I used a loadpro which tests the power and ground circuit integrity. If it only drops 0.5 volts, the wiring is good. Replace the assembly. There is no removing the motors and bench testing on these. Replace assembly. I think you're thinking of the bosch system
Hi excellent video I’m in the same situation, same code and no built pressure in rear axle and voltage and grounds are fine in the same pins so replace the assembly? Does it work for you in your case?
@@eduardoenriquebarreto6269 hey there, yes it fixed the problem 👍
@ thank you for your answer I activate the front pump and works but the rear pump you can’t hear that works same scenario thanks again
My front pump motor is out. Can i replace just the motor? Or does it have to be the entire unit?
@@jakeperry3333 Replace the whole unit.
I have 2007 4300 with hydraulic brakes. I changed out rotted brake lines, refilled and bled the brakes and now I have a warning light on (Brake Pressure!). When the truck is running the pedal feels a little stiff and the hydroboost motor stays on constantly. If I unplug the relay to the hydroboost, the brakes feel normal and the Brake Pressure! Warning light goes off. I'm stumped. Power steering fluid is topped off too. Not sure where to go from here
Probably goes off because you remove power from the module. Get a scanner and read the codes in the abs ecu
Can you convert hydraulic braking system to an Air brake system on the 4300's
Yes you can, but the cost won't make it worth the job. I would estimate $20k+
Hi, any company you know they fix the module?
@@flacan4046 Not that I know of.
How many amps load did you induce?
There’s also a connector in the face of the motor, that need to be checked. Or motor removed and bench tested.
@@commenter5469 I used a loadpro which tests the power and ground circuit integrity. If it only drops 0.5 volts, the wiring is good. Replace the assembly. There is no removing the motors and bench testing on these. Replace assembly.
I think you're thinking of the bosch system