Yammy Trim Switch Failure

My power trim switch on the throttle handle of my Yamaha 704 Remote control has failed. It will not trim up. I checked the orginal switch with an ohm meter and it was reading 50 ohms when pressed in the "Up" position and dead short when in the "down" position. I assumed that the switch..which was 5 years old had just become resistive. I ordered a new switch at a dealer....$60 worth and installed the new switch. I installed the new switch, tested it and the motor trimmed up fine. So..off to the lake! As soon as I'm in the water...I try to trim the motor up and it isn't working...same problem! I haven't removed the new switch to check but I suspect that it has similar resistive characteristics. The switch is a single pole double throw type switch. I measured voltages on the wires going to the switch and there is +12 volts on the associated leads to the up and down motion and 0 volts on the 3rd wire. This indicates that the switch takes the voltage "low" to make the pump turn on in the proper direction. I'm thinking that something is causing the Up switch contact to burn because its trying to pull to much current through the switch. Anybody had any experience with this problem?

thanks, Bill Durham

Ps....the switch on the motor trims it up just fine..its just the remote that is failing.

"Bill Durham" <billdurham@attglobal.net> wrote in message news:hYKdnSFdb83k4ZDfRVn-qg@comcast.com... A little help please....

My power trim switch on the throttle handle of my Yamaha 704 Remote control has failed. It will not trim up. I checked the orginal switch with an ohm meter and it was reading 50 ohms when pressed in the "Up" position and dead short when in the "down" position. I assumed that the switch..which was 5 years old had just become resistive. I ordered a new switch at a dealer....$60 worth and installed the new switch. I installed the new switch, tested it and the motor trimmed up fine. So..off to the lake! As soon as I'm in the water...I try to trim the motor up and it isn't working...same problem! I haven't removed the new switch to check but I suspect that it has similar resistive characteristics. The switch is a single pole double throw type switch. I measured voltages on the wires going to the switch and there is +12 volts on the associated leads to the up and down motion and 0 volts on the 3rd wire. This indicates that the switch takes the voltage "low" to make the pump turn on in the proper direction. I'm thinking that something is causing the Up switch contact to burn because its trying to pull to much current through the switch. Anybody had any experience with this problem?

thanks, Bill Durham

Ps....the switch on the motor trims it up just fine..its just the remote that is failing.

by chance, do you know where the relay is located?

thanks, BD

Problem solved. I didn't think it was the relays since the switch mounted on the motor worked fine. The remote switch has a pigtail about 3 feet long that has the little bullet type quick disconnect connectors on it. These quick disconnects plug into matching connectors that come out of a multipin connector that is the harness that goes back to the engine. In this multi pin connector, the blue wire, which is the "Up" control wire...the contact had been pushed back within the connector and wasn't making good contact. I used some contact cleaner on all of the connections, pushed the contact back into the connector, plugged it back together and violo! Up trim.

thanks for all of your responses....by the way, I priced that relay assembly from my local dealer $207!

BD

Warren

Warren

Interesting...I didn't bother to remove the assembly but I gather from what you are suggesting is the relay's are replacable in the assembly. I'll definetly keep that in mind. I sold electronic parts for 10 years so if they are available I can find one!

thanks again, BD