Hi, I am working on a 2008 3500 CCLB 4WD Diesel.
JA: Are you fixing your 3500 yourself? What have you tried so far?
Customer: I appear to be having low voltage on my B+ signal going to the trailer brakes
on a triple axle trailer with 12"x2" dextor axles and electric trailer brakes. The max voltage I see with the motor running and battery voltage at 14.+ is 11.44 when gain is set at 10. By moving the gain up and down I can vary the voltage. Shouldn't I be seeing the full system voltage?
JA: Have you tested the battery with a voltmeter? And can you see if it's leaking or not?
Customer: The ultimate problem and that the brakes don't seem to fully applied. I adjusted them all up to specsc. Cleaned the connections on the trailer pigtail and at the truck plug in. I have measured the current with a inductive pickup and it is putting out 15.5 amps total. With 5.3 to 5.4 going to each axle and each magnet 2.62 to 2.72. It used to stop great until the trailer pig tail got got and put it out of the truck socket and pulled the wires out of the junction box on the trailer and shorted out.
JA: Anything else you want the mechanic to know before I connect you?
Customer: I am wondering if I have damaged the TBCR in some way? Do I need to reset it? Do I need to disconnect both batteries to allow it to reset? So, the big question is what should the output from the TBCR be? Should it match the B+ voltage or should it be some voltage less?