jakesol
New Member
Good morning, this is my first post although I have utilized the the forum a fair bit as a guest. I am struggling with a problem with a T300 I am working on. The main issue is with the Traction Lock on the machine. Originally the owner discovered that the harness for the solenoid was completely rusted out so he replaced it with a generic plug on both sides. This did not correct the issue at which point he contacted me. I checked the codes and was getting a 16-07 error which is Traction Lock Solenoid Open. I obtained an electrical schematic but found that the schematic did not jive with what I was looking at in the machine. I contacted the local dealer and it indeed seems the schematic is incorrect....I will get back to this in a moment. I checked the solenoid based on the information provided by the dealer....that is that the two wires coming from the solenoid are power and ground....there was no continuity which suggested the coil was fried and hence the open code. I ordered a new coil installed and the code disappeared.....but the traction lock remains on. So now I am wondering if the information from the dealer was correct....he was certainly not certain and confessed he had not seen this before....they have always been very helpful. Here is what I am looking at....the schematic shows three wires going to the solenoid harness....pull, hold, and ground. The harness to the solenoid has only two wires which based on my discussion with the dealer and a continuity test seem to be power and ground. When I tested the wires on the three wire side of the harness one was indeed ground, one had power to it 5.4V with machine not running and around 6.3V with machine running. The third wire showed zero voltage. I hooked up the solenoid with the power wire to the red on the solenoid and the ground to the black. Like I said the code is no longer showing but the traction lock remains on. My thought process is now this...1) solenoid is wired correctly but valve is seized in lock position. 2) Solenoid is possibly wired in reverse polarity and is therefore not retracting lock. or 3) The third wire is either a signal or hold wire and does in fact need to be wired in somehow. As a side note the owner has had to jump the starter for some time now and a 22-03 code does show indicating that issue. In addition the alternator does appear to be overcharging at 15.4 at the alternator and 14.8 at the battery....could this effect the traction lock also? The machine has been sitting for over a year and in our climate on the west coast of Canada that does not bode well for electrical systems. I typically work on marine equipment and it is a constant struggle. I apologize for the lengthy explanation but I am just trying to accurately describe the situation. Thank you in advance for any insight any of you might have.
