dcathey Posted May 14, 2023 Report Share Posted May 14, 2023 I haven’t had time to start troubleshooting but yesterday I noticed my trim to my new 250 sho would not work at helm or on engine when ignition was off. I turn key and it works but what’s odd is immediately after key is off it will work for a little while. Any clues as to where I need to look first, this one has me stumped. *Sidenote, I just did a lot of console work by taking out all agm trolling motor batteries and putting in a lithium troller and new agm crank. Prior to that there was no issue. I just don’t know what would cause the trim to not work when off intermittently Quote Link to comment Share on other sites More sharing options...
George Seither Posted May 14, 2023 Report Share Posted May 14, 2023 Are you sure you didn’t miss a wire that goes to the house battery when you did your work? Quote Link to comment Share on other sites More sharing options...
redzone1 Posted May 14, 2023 Report Share Posted May 14, 2023 Got to be missing something that plugs into the wiring harness that goes back to the Yamaha hub bus. 1 Quote Link to comment Share on other sites More sharing options...
SCFD rtrd. Posted May 14, 2023 Report Share Posted May 14, 2023 Intermittent connectivity can be caused by corrosion or loose wiring or wire connectors. When the switch is used, the bad connection causes the wiring and connectors to heat up. As they heat up, they swell up and make a temporary connection. When the wiring or wire connectors cool off, they shrink and loose the electrical connection. Quote Link to comment Share on other sites More sharing options...
jh141 Posted May 14, 2023 Report Share Posted May 14, 2023 I did have the trim relay on the motor fail on my SHO. It was intermittent and happened at the throttle control and at the motor, but I can not remember the ignition being on or off making any difference. I would check throttle control connections in the console first. Quote Link to comment Share on other sites More sharing options...
dcathey Posted May 15, 2023 Author Report Share Posted May 15, 2023 I’m going to pull boat out tomorrow and begin tracking it down. I’m sure its something that I overlooked when I reworked console thanks for the replies Quote Link to comment Share on other sites More sharing options...
George Seither Posted May 15, 2023 Report Share Posted May 15, 2023 At least it's isolated, it's all a Yamaha Function Quote Link to comment Share on other sites More sharing options...
dcathey Posted May 15, 2023 Author Report Share Posted May 15, 2023 I’m at boat now and it just doesn’t make sense. I guess I need to locate what wire on ignition gets power to trim unit with ignition off Quote Link to comment Share on other sites More sharing options...
jh141 Posted May 15, 2023 Report Share Posted May 15, 2023 My boat has trim and tilt when the battery switch is on, no matter what position the ignition is in. Check the grounds.....Bet you never heard that before...LOL 1 Quote Link to comment Share on other sites More sharing options...
George Seither Posted May 16, 2023 Report Share Posted May 16, 2023 Same as JH141 battery isolation on trim and tilt work Quote Link to comment Share on other sites More sharing options...
dcathey Posted May 16, 2023 Author Report Share Posted May 16, 2023 Just wire wheeled all connections to battery. Literally nothing else is effected. Trim is strong and works perfectly when running and for about 10-15 seconds after ignition is turned off. Got about 15 hours on this engine 😆 note: I have checked fuse, I knew it was fine. I do have a second station and that throws some other variables but I just don’t get where the break is when key is off Quote Link to comment Share on other sites More sharing options...
George Seither Posted May 16, 2023 Report Share Posted May 16, 2023 Quote Link to comment Share on other sites More sharing options...
George Seither Posted May 17, 2023 Report Share Posted May 17, 2023 Find this relay check voltage on red terminal with meter key off, switch battery isolation switch on and off power should cycle with switch, if you choose to energize relay at the relay I strongly suggest a power probe I don’t like arcing threaded termination! This would validate the relay operation at the engine. look in console towards engine shift control and see if a harness plug with green and light blue is unplugged or partially unplugged, same from second station plugs should be the same colors. Fuse 7 should be a 20 amp for trim and tilt that you checked Hope it helps Quote Link to comment Share on other sites More sharing options...
dcathey Posted May 17, 2023 Author Report Share Posted May 17, 2023 Thanks George, I will work through that this afternoon and report back. I did look at all harness’s and connections in console. All seem tight. I lightly twisted and worked them while trimming engine to see if something was lose. Didn’t find anything Quote Link to comment Share on other sites More sharing options...
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