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HELP!!! Yamaha 704 binnacle wiring

Old 06-11-2016, 05:02 AM
  #1  
jwb
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Default HELP!!! Yamaha 704 binnacle wiring

I have a dual 704 pinnacle. The port motor has intermittent problems with the trim. Pretty sure problem is in one of 2 places.
1-There is a harness between the pinnacle (with bullet connectors on this end) and the 5 pin round plugs that are going to each motor. There may be a wire with a break in it.
2- there are 7 sets of wires coming out of the pinnacle: 2 sets for the individual trim switches, a set for the common "thumb" trim, 2 sets for neutral safety switches. Then there are 2 sets that go into the bottom of the 704 pinnacle that are wiredinto the trim circuit (red,green,blue) .WHAT ARE THOSE FOR?
When I wiggle the harness or those mystery wires I get the intermittent short, but. not consistent enough to troubleshoot.
I homed out the 3 trim switches and all are ok. If I swap port and starboard on the round 5 conductor plug the problem swaps to the other motor.
HELP!!!
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Old 06-11-2016, 05:33 AM
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This is a single, any help??
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Old 06-11-2016, 05:37 AM
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Originally Posted by jwb View Post
I have a dual 704 pinnacle. The port motor has intermittent problems with the trim. Pretty sure problem is in one of 2 places.
1-There is a harness between the pinnacle (with bullet connectors on this end) and the 5 pin round plugs that are going to each motor. There may be a wire with a break in it.
2- there are 7 sets of wires coming out of the pinnacle: 2 sets for the individual trim switches, a set for the common "thumb" trim, 2 sets for neutral safety switches. Then there are 2 sets that go into the bottom of the 704 pinnacle that are wiredinto the trim circuit (red,green,blue) .WHAT ARE THOSE FOR?
When I wiggle the harness or those mystery wires I get the intermittent short, but. not consistent enough to troubleshoot.
I homed out the 3 trim switches and all are ok. If I swap port and starboard on the round 5 conductor plug the problem swaps to the other motor.
HELP!!!
Look at the tilt and trim solenoid on the intermittent motor. Given its not consistent on the control wiring, it may be the solenoid going bad. Swap the solenoid from your good motor to bad to see if that is your issue. Not saying it's not you harness, but it's usually not the case.
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Old 06-11-2016, 06:27 AM
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The red is power, blue is up like the sky, green is down like the grass under your feet.
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Old 06-11-2016, 06:38 AM
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Take each bullet connector apart and lube, youll need to unravel the harness some to find them all
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Old 06-11-2016, 08:47 PM
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jwb
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Found the problem. The wiring in the harness is actually corroded inside the insulation jacket. Very light gauge wire. Spliced a temporary wire in. Need a new harness.
BTW, those mystery wires were relays inside the 704.
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