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Suzuki DF140 electrical issue

Old 11-28-2019, 10:17 AM
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Default Suzuki DF140 electrical issue

My port 2012 DF140 would not start so the mechanic changed out the neutral safety switch on the engine and it started right up. Now two days later it will not start again and also the trim is not working correctly from the throttle. The trim switch on the engine works for up/down but only up from the throttle. Any ideas? Could the ECU be the issue? Trying to figure out what could cause both issues. Thanks in advance
Old 11-28-2019, 10:49 AM
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My response in a different thread:
It could be a white wire issue within the harness. I just went through this on my 2006 Df225.
My symptoms were more severe than you describe.
Low voltage reading at helm gage.
No trim/tilt from throttle (switch on engine worked fine).
Got it started but no indication of battery charging and big voltage spikes while trimming. This killed the engine and I could not get it started again.

Solution: Wired in a fused POS jumper from helm's POS buss bar to hot stud on ignition switch.

As it turns out, low voltage at the ignition switch was responsible for a couple of other oddities I had learned to live with.
One was the throttle trim switch was finicky in a single direction.
The other was cold starting/IAC issues. Needing to advance the throttle to keep the engine running until it warmed up.
The jumper fixed both of these problems also.
Old 11-28-2019, 12:48 PM
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More than likely one trim switch is faulty, and the second neutral switch is either out of adjustment or broken, and it was just coincidence the first repair corrected the real issue.
Old 11-29-2019, 07:27 AM
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Default 140 Suzuki

Had to same problem with 2006 140. Was the white wire issue. Bad fuse/fuse holder corrosion. Spliced in new fuse holder and new fuse corrected problem.
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Old 11-29-2019, 08:49 AM
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Thanks I will try these. Where is the fuse for the white wire? Engine side or battery side? Thanks again.
Old 11-29-2019, 06:21 PM
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Originally Posted by cjlukens View Post
Thanks I will try these. Where is the fuse for the white wire? Engine side or battery side? Thanks again.
Mine was at battery.

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