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Robert Britton · (12-26-2014)

(12-26-2014 02:47)GregOConnor Wrote: Trying to stop an alarm buzzer from sounding. '89FC has an alarm buzzer that sounds when the engine is on. I guess the FC is an 88 1989 300 hp cat 3208 model. The alarm stopped sounding several times, once in a parking lot at 5 mph after hitting a speed bump it stopped but then restarted while backing up a driveway. I note that there were a bunch of hacks under the dash that I reconnected and cleaned up so I may have reattached a wire to a control that had the issue or it is an entirely new issue. I plan to go to San Diego this week to help the owner out and hope that someone can help with some direction and opinion.

1-The wire to the expansion tank is not attached and just hanging loose I reattached it and made sure it is full of water and no difference. I am not sure what signal from this wire is the system error signal? Is it grounded-closed to signal a water level fault or is it open to signal a water level fault?
2- where are the buzzers and what is the best way to get to them? I hate to cut them out but I may need to do that and install a light since the alarm sounds even with all gauges signal things are good. at this point the alarm is crying wolf.

3-oil pressure fault switch. What is the error state.? does it ground out to switch a error or does it open to switch an error?
3b- is there a oil temp switch?

4- The Jack switches. do they all connect in series or do they all try and throw a relay? how do they work? where are the switches and what do they look like.

5-Do the steps and door signal a buzzer? are there any other places to look?

6- is there one buzzer for each warning?

7-Kysor how is that related to the buzzer. reading posts on the old forum it sounds like there is a redundancy of buzzers

8-does anyone have a diagram?

9- If a warning light that spells OIL or BATT or TEMP is called an idiot light, What do you call a warning buzzer that only sounds BUZZZzz?

thanks in advance

Greg, I would suspect the jacks. The control levers are on the floor left side of the driver seat. Try deploying jacks and then bring them back to stowed position. If one of the jacks has a weak spring it can cause the buzzer to go off, most notably on bumpy roads (or speed bumps), or maybe it just was not brought all the way up after last use.