Trailblazer 55D problems.

[JerseyWelder]

One of our older Trailblazers at work lost output. I do not know much about these machines and don't have too much time to spend on it. It was welding fine and the 110 outputs were fine and now the whole front panel is dead. No weld output and no 110 output. Where is a good place to start diagnosing? Thanks in advance. Dave serial # is HK277349

[cruizer]

Pull up a wiring diagram and check wires #50 and #51 for continuity. these wires are off Bridge retifier SR2. ( small black 1" square looking device with 4 pins) If that coil tests good with 5 ohms or less, then its likely that the Bridge is bad. Or center brush is not making a good contact with its slip ring.

[JerseyWelder]

Thank you. Will check this week when I have time. Dave

Pull up a wiring diagram and check wires #50 and #51 for continuity. these wires are off Bridge retifier SR2. ( small black 1" square looking device with 4 pins) If that coil tests good with 5 ohms or less, then its likely that the Bridge is bad. Or center brush is not making a good contact with its slip ring.