2001 V150TLRZ Constant Alarm

[SeaProChuck]

Nevermind, I have the service manual (T-18616-02-01) and have performed the tests like you said to do based on the service manuals instructions. It does not go into detail to say if I can leave the trim sensor disconnected or not. My only concern, as I stated in previous posts is, considering it is tied into the alarm, will disconnecting it hinder anything else in the warning system. The test procedures outlined in the service manual show disconnecting the different components and testing them while not connected to the system. It shows no way to test them while installed and wired into the rest of the motor. If I knew any other way to do the testing then I wouldnt be on here asking for some help and guidance now would I???? We all don't possess the knowledge that you have about Yamaha outboards sir, thats why people come here looking for help.

[boscoe99]

Grey wire was hooked up to another grey wire with black stripe (ground) via bullet connector. The alarm goes off as soon as key is turned on. The only way it goes off is if I unplug the 4 way connector that connects pink/black/orange wires (trim sensor) to green and green with red stripe. When it is unplugged the alarm stops.

Why then is there a plug in the gray wire that is shown in your photograph?

[boscoe99]

The grey/black wire applies a ground to the CDI unit which tells the CDI that a thermoswitch has closed. In which case the alarm should sound. The motor should go into RPM reduction mode.


The grey wire from the sender connector appears to be having a ground fault of some kind. The grey wire being grounded then applies the ground to the gray/black wire. The CDI gets that ground and then activates the alarm.


My guess anyway.

[boscoe99]

Nevermind, I have the service manual (T-18616-02-01) and have performed the tests like you said to do based on the service manuals instructions. It does not go into detail to say if I can leave the trim sensor disconnected or not. My only concern, as I stated in previous posts is, considering it is tied into the alarm, will disconnecting it hinder anything else in the warning system. The test procedures outlined in the service manual show disconnecting the different components and testing them while not connected to the system. It shows no way to test them while installed and wired into the rest of the motor. If I knew any other way to do the testing then I wouldnt be on here asking for some help and guidance now would I???? We all don't possess the knowledge that you have about Yamaha outboards sir, thats why people come here looking for help.

It will not hinder the warning horn or the RPM reduction mode.

However, if you have a tachometer with warning notice (light or icon) it will not indicate an over temperature event if and when that occurs.

[SeaProChuck]

Ok, I am going to pull the trim sensor and see if there is any skinned wire or something grounding out. I have a analog Teleflex tach. So I do not have to worry about a light or warning signal as my tach doesnt have those features.

To recap, if the problem is found with the trim sensor, I will simply disconnect it as I dont utilize it anyway.The warning system will still function properly as long as the temp sensors and oil level sensor are working and ohm out as outlined in the manual.

[SeaProChuck]

Boscoe, thank you for helping me and posting this wiring diagram as my manual only shows the wiring diagram of the individual systems seperately. It doesnt show how they are intergrated with the CDI and switches, it helps seeing that.

[SeaProChuck]

Why then is there a plug in the gray wire that is shown in your photograph?

The grey wire on the male sensor plug shown has no other wire to connect to on the female side that it plugs into.

[boscoe99]

Boscoe, thank you for helping me and posting this wiring diagram as my manual only shows the wiring diagram of the individual systems seperately. It doesnt show how they are intergrated with the CDI and switches, it helps seeing that.

The diagram I posted is page 8-16 from your manual. Annotated to show the connection of the grey wire to the grey/black wire.

Yamaha manuals are written for Yamaha trained mechanics. They can be hard to decipher by a guy that does not work on Yamahas every day for a living.

Once again, disconnecting the trim sender on your model will have no effect whatsoever on the over temperature or low oil warnings for your motor.

[SeaProChuck]

Thanks Boscoe! I appreciate your help.