Yesterday I took my tilt/ trim relay apart to see why it was intermittently inop. If I follow you, you say you bypassed the relay and it worked. Is a subject I was going to do an info post on but will mention it here. Is there a chance this sensor has come out of adjustment even further and that the motor won't fire with the sensor out of adjustment? Would this prevent the main power relay from not activating? I ran the motor all week last week with no issues. my trim gauge has been acting up lately where it never shows the motor fully down. On a side note, but may be related which is why I bring it up.
I feel like I am really close, but struggling with next steps.Īnyone know where the yellow and green wires for the main relay come from? When should they be hot? What is too much resistance on the contact side of that relay? The Grn wire looks like it comes from the ECU, but there is also a Grn wire that comes from under the dash. From what I am guessing, the Yellow wire comes from the keyswitch which has +12Vdc at the keyswitch. Unfortunately I do not have schematic for the boat (Lund 1700 Fisherman). I do not see +12Vdc at either the Yel or Grn terminals of the relay connector with the key in RUN or START. If I short the Red->Red/Yel wires in the relay connector the motor starts, so I know the issue is getting this relay pulled in properly. This could be a bit high, but not sure this is the issue. Contacts have 0.52ohms across when closed. Contacts close withe +12Vdc across Yel->Blk or Grn->Blk. I have removed the relay and bench tested it. I have isolated the issue down to something related to the main relay.
No spark at the plugs, checked one on each ignition coil. I have 2003 Yamaha F115TR motor that cranks fine but will not fire.
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