853 auxiliary switch resistance question

[MacGruber]

Hello, I'm new to the board and hoping to find/confirm some information before ordering parts. I have a 853 C-series bobcat and currently the auxiliary hydraulic lights are flashing (both at the same time) preventing me from using that function. I tested the proportional switch on the front of the right hand joystick and its measuring 900 ohms from center wire (white/red) to either side when the switch is in the center position. When the switch is moved from center to one side the resistance goes to 1.2K ohms on that side and drops to 600 ohms on the opposing side. When you move the switch to the opposite side the resistance readings switch. The manual I have for 853/853H says these values should be between 1-5 ohms on page 8-31 and another thread I found on this site for the 763 said between 1.5K and 4.5K ohms. Can anyone confirm the values I should be looking for? Thanks Nathan

 

[Tazza]

Does your machine have proportional controls or just on and off? Does the switch click or is it smooth as you slide it from side to side?
The flashing could be a shorted or open coil(s) on the stems.

 

[MacGruber]

Does your machine have proportional controls or just on and off? Does the switch click or is it smooth as you slide it from side to side?
The flashing could be a shorted or open coil(s) on the stems.

The controls are proportional and the switch slides smoothly from side to side (self returns to center) When I unplug the right hand joystick connector while the key is on the lights switch from flashing together to alternating flashing. The resistance values seemed way off as compared to the manual I have but they're identical from center to one side and then to the other. I considered the coils but it seems like the PWM module wouldn't be able to see them until the switch is cycled to one position or the other and the aux. hydraulic lights flash as soon as the key is turned "on". That tells me the problem lies in the wiring, the switch, or the module itself.

 

[Bobcatdan]

The controls are proportional and the switch slides smoothly from side to side (self returns to center) When I unplug the right hand joystick connector while the key is on the lights switch from flashing together to alternating flashing. The resistance values seemed way off as compared to the manual I have but they're identical from center to one side and then to the other. I considered the coils but it seems like the PWM module wouldn't be able to see them until the switch is cycled to one position or the other and the aux. hydraulic lights flash as soon as the key is turned "on". That tells me the problem lies in the wiring, the switch, or the module itself.

Lights blinking- problem area diverter solenoid or wiring. You can check the coils, ohm test is 1 to 5 ohms.

 

[MacGruber]

Lights blinking- problem area diverter solenoid or wiring. You can check the coils, ohm test is 1 to 5 ohms.

I checked the resistance of the diverter solenoid today and it was 7.3 ohms. I checked it at the solenoid itself by disconnecting the connector and then again at the PWM module at its connector and got the same reading in both places which also verified the wires from the module to the solenoid. Do you think an additional 2.3 ohms would be enough to cause the PWM module to lock out the auxiliary functions?

 

[MacGruber]

I checked the resistance of the diverter solenoid today and it was 7.3 ohms. I checked it at the solenoid itself by disconnecting the connector and then again at the PWM module at its connector and got the same reading in both places which also verified the wires from the module to the solenoid. Do you think an additional 2.3 ohms would be enough to cause the PWM module to lock out the auxiliary functions?

I also rechecked the resistance of the proportional switch in the right joystick with my good meter. It checked good with 2.6K in center position and 3.8K in one direction and 1.2K in the other. I checked it at the connection at the bottom of the joystick and also at the PWM module and had the same readings.

 

[7LBSSMALLIE]

I also rechecked the resistance of the proportional switch in the right joystick with my good meter. It checked good with 2.6K in center position and 3.8K in one direction and 1.2K in the other. I checked it at the connection at the bottom of the joystick and also at the PWM module and had the same readings.

there is a s/b about this i dont recall its nature. i rember there is a bullet , enough to make me check histirical problems and soultions.. no access from garage but . its there,

 

[MacGruber]

there is a s/b about this i dont recall its nature. i rember there is a bullet , enough to make me check histirical problems and soultions.. no access from garage but . its there,

How can I gain access to this service bulletin?