97 Maxum Mercruiser Alpha 5.7 replacing the trim/tilt control with Seastar CH1752P

[gica]

Hi guys I finally got down to replacing the old 3000 Classic remote control with a new and improved CH1752P from Seastar. The wiring on the 3000 classic included he yellow/red wire, the 2 purple wire for off/run function and there are 4 more wires that go to the trim/trailer buttons. There is a purple/white, red/blue, light blue/white, and green/white. Looking inside the remote the red/blue and light blue/white go to the trailer button where the red splits and continues up to the trim along with the purple/white and the green and white. Now the CH1752Phs 2 different buttons supposedly the top for trim and the bottom for tilt/trailer even though they both look identical with up/down arrows and green, red and blue wires. I hooked up the red as a split for both trim and tilt like on the 3000 classic and then connected the trim to all the corresponding colors, red to red, blue to purple and green to green, so I am left with red to red and blue to blue, for the bottom buttoned for tilt. So the tilt works but the trim only works down the blue to purple/white doesn't. Does anyone know the wiring on the 97 Merc Alpha 5.7? Thanks in advance.

 

[Bondo]

Ayuh,.... The 4th wire for the tilt, by-passes the trim limit switch at the transom, which cuts the power to the pump, when the top of Trim is hit,...

My Guess is, the trim limit switch is junk or disconnected, but not by-passed,...

 

[gica]

Actually the purple/white wire is for the trim I opened up the old controller and it goes on top with the green, the trailer switch is red and blue.

 

[gica]

Pictures include:
1) the actual new control box CH-1752P which shows the bottom switch with a 3 wire harness(blue/white, red/white, green/white) the top trim switch on the handle is identical
2)4wire harness is the harness for the trim/trailer combo on the old 3000 classic. The wires go from the boar harness to the control box harness as: green/white to green, blue/white to blue, purple/white to purple and red/blue to red
3)traileswitch picture shows the red and blue wire go to the trailer switch the red continues up to the following picture
4)trimswitch which shows the wiring as red, purple and green. So red is the 12V blue and green are the up and down and the purple is the limit tilt or trailer.

 

[Bondo]

Ayuh,.... My question is,..... Is the trim limit switch, wired into the circuits, or not,... Check at the transom,....

 

[gica]

OK cleaned up the Trim Limit switch, sanded the contacts and now it works fine. So the blue/white wire will hook up to the purple/white should I hook up the green/white there also or leave it alone?

 

[Bondo]

Ayuh,.... The down circuit goes right to the pump,...

The up circuit, trim goes up, til the limit switch opens, ya by-pass it with the tilt circuit, which is right to the pump,....

 

[gica]

OK so on the bottom button(old trailer/tilt) it's safe to hook up the green/white with the blue/white and both connect to the blue/white that goes tot the pump, or leave it be and just do the blue/white as trailer/up tilt like the old setup? On the top button(trim) the blue/white to the purple/white is the switch and the green/white to green/white is the down straight to the pump.

 

[gica]

Thanks a lot for all the help, I installer the Seastar unit and adjusted the cables the motor started up great after a couple of years of being neglected and not started.
My next question is on the recoating the trailer and boat. here's the link of my question. You guys are the only ones answering questions out of 4 different sites, so number 1 in my book.
http://forums.iboats.com/forum/boat...at-and-2-wheel-trailer-painting-help-required