Hello I have a 259b3 sn yyz02185 everything works but the caution light flashes and the rabbit flashes so the 2 speed doesn’t work. What’s the best way to start troubleshooting? Can someone pm me a wiring diagram?
PM sent. Do you have an O&M Manual.?
No
You can download one in Adobe pdf format from Cat for $66. Go to - https://catpublications.com/ When the popup appears click on "Continue as Guest" Type SEBU8495 into the box and click Search, the illustration below will appear. Here is one on eBay for $45 + $7.50 shipping but there is no indication of what version it is. Could be years old for all I know. (The electronic document above is Version 16, the latest available) https://www.ebay.com/itm/CATERPILLA...D-STEER-OPERATOR-MANUAL-SEBU849-/133199101156
After studying the schematic i started at the 2 speed switch, tested good. Moved to the two wires that run from the ecm to the 2 speed solenoid, removed the plug at the ecm and tested continuity. H784 was good P981 had no continuity from the ecm to the solenoid Split the plug (Connector #2) and tested there Good continuity from the ecm to connector #2 Nothing from connector #2 (Pin 27) to the solenoid must be a break in wire P981 purple from connector #2 to the solenoid, ran a "test" jumper wire from connector #2 to the solenoid and everything works. Will replace harness. Thank you for your help!