Hi folks!
Hoping you can help me with one (last?) problem on my 863 C-Series: When I engage the aux system, it doesn't work and the light flashes. This is the exact sequence I'm seeing:
I opened the cab and found the solenoid coils. These are my observations, in no particular order:
Hoping you can help me with one (last?) problem on my 863 C-Series: When I engage the aux system, it doesn't work and the light flashes. This is the exact sequence I'm seeing:
- Machine on (engine running or not; doesn't appear to matter).
- BICS enabled (whether through sitting in the seat, or pressing the override button with the cab up)
- Press the aux enable button, once, so the top light (momentary) lights up. At this point, the light is illuminated solidly.
- Attempt to actually _use_ the aux attachment with the rocker switch on the right hand control.
- Nothing happens (no clicks, no hydraulic pressure, no hoses jumping), but the top light goes out on the panel and the lock light starts flashing
- At this point, no button pushing can leave this state. Have to turn the key off & back on to reset it.
I opened the cab and found the solenoid coils. These are my observations, in no particular order:
- The connector seemed to be solid, and was clean on the inside.
- I removed the connector and tested the coil, as prescribed. Each coil was ~3ohm resistance, nicely inside the service manual's 1-5ohm range.
- I can reproduce the issue with the cab up (key on, engine off). I don't hear any clicking when the light starts flashing on the panel.
- Each connector on the harness side has a black and a green wire; the green wire on one of the connectors has a red stripe. Both of these had some insulation scraped off to the bare wire, almost looked deliberate. But those spots weren't touching anything, and even holding them manually the issue still happens
- The fuses in the back right of the machine are all good, including the PWM and Accessories fuses.
- Last time we used the aux system, several months ago, was to run a cement mixer attachment. I remember having this same thing happen, where the aux system wouldn't engage. I remember then revving the engine to full throttle, then pushing the button. That let the system enable. I thought it was hitting a pressure relief or something on start and needed full throttle to 'start' the aux system, but now I'm wondering if that was an electrical issue too...
- With the connectors plugged in as normal, and the machine off, there is electrical conductivity from the bare spots on the green wires to the housings of the coils, as well as between the coil housings. I don't know what to do with that information.
- With the connectors unplugged, I can turn the key on (engine off), perform the procedure above, and the light doesn't switch to flashing. So it only happens when the coils are plugged in, but the coils test correctly...