[ATV76]

I have a 2000 TRX350FM that blows the main fuse even with the key off. I unplugged the rectifier and the fuse doesn't blow. I assumed it's old and probably has an internal short so I replaced the rectifier. Even with the new rectifier the main fuse blows. I checked the wiring from the rectifier plug up to the ignition switch connector and didn't find any wires that would be shorting out. I am hoping someone can point me in the right direction to check now.

Thanks!

 

[shadetree]

welcome. check the carb's heating element connection, unplug it from the harness, see if it keeps blowing the main fuse ? .

 

[ATV76]

Thanks! I unplugged that and the fuse doesn't blow now. I'll check that wiring for a short somewhere.

 

[shadetree]

Thanks! I unplugged that and the fuse doesn't blow now. I'll check that wiring for a short somewhere.

good deal...hope it works for ya !. one thing to check on that heater wires ?, look closely at the color of the wires at the harness plug, and then the heater plug, see if they are reversed ?.

 

[fishfiles]

Depending on where you live might make a difference or whether or not you even need that carb heater , I had run my old 450 with it unplugged and never seen any effects , but I live in the South and it doesn't really get too cold

 

[ktriebol]

Something seems fishy here, but I haven't dug deeply into the details. The OP says the main fuse blows even with the key off. The carb heater has been suggested as a possible cause, but the carb heater only gets power when the key is on, correct? Also, the OP says that the fuse doesn't blow if he disconnects the R/R or the carb heater. I don't understand how that can be because they are not in the same circuit. I think more information will be forthcoming on this problem.

 

[shadetree]

Something seems fishy here, but I haven't dug deeply into the details. The OP says the main fuse blows even with the key off. The carb heater has been suggested as a possible cause, but the carb heater only gets power when the key is on, correct? Also, the OP says that the fuse doesn't blow if he disconnects the R/R or the carb heater. I don't understand how that can be because they are not in the same circuit. I think more information will be forthcoming on this problem.

never seen any fuses blow with the key off ?, but I know when they are running ?, i've seen them blow the fuses, and then the trouble was the carb heater. I watched this on youtube awhile back, it was a trx350 rancher.

 

[ATV76]

I agree ktriebol, I have never seen this either. It doesn't make sense to me how the fuse won't blow with RR unplugged, but if I plug it in and unplug the carb heat connector it doesn't blow. Definitely two different circuits. I won't have time to do anymore checking until late tonight or tomorrow.