I set my clearance to 0.5mm and adjusted even closer and backed the springs off to minimal resistance to see if that made a difference and it does the same thing. When I flip the "TOW" switch it pulls inner and outer brake armature in no prob.
My battery is low from the unit sitting, twenty three point something volts is what I remember last. 23.8 I think
(It's been a week since I last worked on it) I will check tomorrow and even plug another 24v battery that I know is fully charged into the unit.
The Service Manual that I have is for an older SP48 and appears that most components and wiring are the same but not all. That alone could be what I am missing but this manual has been the closest thing I could get my hands for this unit. From what this manual shows TP5 on the brake module is the brake release input and that no input here means the problem is wiring switches etc somewhere before the module.
This manual shows the K2 brake, K3 steer angle relay and the height limit switches interacting and dropping in/out under various conditions.
The procedure must be different from the first time I step on the pedal and the machine works, compared to the second time I step on it. This book keeps bringing me back to the K3 relay not energizing the second time but I can't find it's missing input, if indeed I am looking in the right place for the problem.
I will check battery voltage tomorrow and try another battery and will post back. I appreciate your response and am open to any more suggestions or thoughts. Thank you