Cat skid loader advanced display screen gone black

[Nige]

Have you measured the voltage arriving into the back of the Advanced Display.?

I'lll send you an electrical schematic. You might find it helpful.

 

[Erik Fako]

no not yet. I assumed that since the top indicators flashed, there was power so I haven't taken panel out yet. Battery is 12+ key off, key reads 14.42 while charging.

thanks re the schematic, I'll take a look as well as checking the voltage to the display.

 

[Nige]

I suggest to back-probe between the power supply & grouind specifically for the Advanced Display.

 

[Erik Fako]

ok, thanks.

 

[Nige]

I assumed that since the top indicators flashed, there was power so I haven't taken panel out yet.

If you have had corrosion issues in other areas on the machine that’s the last thing you should be assuming IMHO.

In the words of my old diagnostics guru - all that ASSUME does is makes an ASS out of U and ME

 

[Iggy33]

I am having mostly the same issues, I can add that the horn also doesn't work after a machine that I bought disassembled, and had been for a year or more. I did some diagnostic work be for it was taken a part and the display worked then. Mach sen. TAW00486. Thanks for any help

 

[Nige]

As per the instructions to the previous poster, try using the schematic and check for incoming power at the back of the Advanced Display while it is plugged into the machine harness. You will need to back-probe between Pins 1 & 2 that should have permanent battery power, and Pins 8 & 2 that should have battery power with the key switch ON.

 

[myfirstskidsteer]

I have no lights no nothing on my display also (jst00975).Can you help out Nige?pretty please. The machine runs fine .I assume if the schematic for mine is the same as the above if I have power on 1 and 8 with a ground from 2 it would be a bad display?If so anyone knows what goes wrong with them (it's like 1500$)?

 

[IceHole]

That any better than going white?

 

[myfirstskidsteer]

That any better than going white?

Not sure what you mean?

 

[Nige]

Have you tried resetting the display as a first step.?

 

[myfirstskidsteer]

Yes sir,tried several times ,battery was severe discharged (prev owner says he had not used it in the last 6-8 months and that the battery had been replaced in the last years. However I was not able to recharge that battery and purchased a new one (agm) and it starts and runs fine but no display or the icons above it (park brake etc)

 

[Nige]

Can you measure the voltage at the centre of the battery terminals, both with the engine stopped and running.

Did the previous owner mention whether or not the display worked when he had the machine.?

 

[myfirstskidsteer]

12.55 engine off,14.7 running, he mumbled something but who knows ....he had different stories

 

[myfirstskidsteer]

I have 14.36 on 1 and 8 at the harness at the display,also ground on 2

 

[myfirstskidsteer]

I noticed that if I unplug the display and plug it back ,when I go about half way with the plug it beeps(if I stop there it continues to beep )but nothing on the screen

 

[Nige]

12.55 engine off,14.7 running

Those are good numbers so that rules that out.

I have 14.36 on 1 and 8 at the harness at the display, also ground on 2

if you turn off the key you should have zero on Pin 8. Please check that.

The display is permanently powered at Pin 1 with unswitched battery voltage. If your machine does not have the (optional) master disconnect switch installed I would suggest to unplug the display for at least 15 minutes to allow it to fully power down. If you do have a master switch you could turn that off. It would achieve the same result, with the caveat that you need to make sure the switch is actually working. It is not unknown for the contacts on those switches to be welded closed.

 

[myfirstskidsteer]

I do have 0V at pin 8 with key of ,12.5V with key on ,14.4V engine running. Disconnected display ,now waiting. Plug it back in 15 min.and report

 

[Nige]

I do have 0V at pin 8 with key of ,12.5V with key on ,14.4V engine running. Disconnected display ,now waiting. Plug it back in 15 min.and report

When you plug it back in and power up, try doing a reset as well.

 

[myfirstskidsteer]

Key on ,hold first and last buttons for 15 sec,correct?