artificialreef
Chief Petty Officer
- Joined
- Feb 21, 2009
- Messages
- 504
Good morning iboaters. On vaca so i am getting some serios restore/repair time in. First off 1983 Tiara 26, twin R drive mercruiser I/O w/oildyne round metal resevoir and two solenoids on each pump. It uses a Trim rocker switch momentary on-off-on momentary. One outdrive works fine. The one i am working on the trim up will not work (It has 2 more seperate tilt toggles on another panel, blue wire?). I jumped the solenoids to hot and the pump worked on both solenoids. I even removed the solenoid in question UP and replaced. Bench test looked a little wierd.it probably was not necessary.
I am now looking at the switch circuit. The toggle has 3 leads. Green on top, red middle and purple on the bottom lead. I can jump the red and green(which appears to be down) and pump works, I jump purple and red silence. I follow the flow chart in the merc troubleshooting manual. I have no voltage at point 8. So this says.
1. loose or corroded circuit connection
2. bad fuse. I dont see one except for the shared down/up one and the down works so thats not it.
3 bad trim switch. I jumped the purple red and the motor does not run. I even ohmd the switch out when flipped and it shorts just fine.
This puts me back to # 1. circuit issue.
Following the purple wire, looks like it goes into the trim limit switch then comes out wh/blue.
Questions.
1.Can the trim limit switch cause a no voltage to the pump? (isnt that what its there for)
2.I believe its normally closed. Could it be stuck open?
3.How do you test it and how can i bypass it for testing. I will replace if it is determined faulty. Dont see that in the manual.
Note: if this limit switch is a possibility i am surprised it is not mentioned in the flow chart.(or does it fall under curcuit)
I am now looking at the switch circuit. The toggle has 3 leads. Green on top, red middle and purple on the bottom lead. I can jump the red and green(which appears to be down) and pump works, I jump purple and red silence. I follow the flow chart in the merc troubleshooting manual. I have no voltage at point 8. So this says.
1. loose or corroded circuit connection
2. bad fuse. I dont see one except for the shared down/up one and the down works so thats not it.
3 bad trim switch. I jumped the purple red and the motor does not run. I even ohmd the switch out when flipped and it shorts just fine.
This puts me back to # 1. circuit issue.
Following the purple wire, looks like it goes into the trim limit switch then comes out wh/blue.
Questions.
1.Can the trim limit switch cause a no voltage to the pump? (isnt that what its there for)
2.I believe its normally closed. Could it be stuck open?
3.How do you test it and how can i bypass it for testing. I will replace if it is determined faulty. Dont see that in the manual.
Note: if this limit switch is a possibility i am surprised it is not mentioned in the flow chart.(or does it fall under curcuit)
