1978 115hp tilt power problem

[hutche]

hi all my 1978 tilt trim motor wont work,being new to tilt/trim on motors i foolishly left my finger on the button longer than needed when lowering the motor now i got no power at all,ive replaced the fuse in the solenoid black box but still nothing.what other damage could be done by my foolish doings?
serial number is 115 etl78c 632032 thanks for your advice

 

[oldcatamount]

Re: 1978 115hp tilt power problem

There should be a fuse panel for the boat electronics under the dash console. Check those fuses to. There may even be an in-line fuse somewhere between the motor and the control box.

 

[emdsapmgr]

Re: 1978 115hp tilt power problem

Those units were a little unusual. The trim control box is wired direct to the battery. They have a dedicated 20 amp fuse in the trim box which mounts under the rear deck of the boat. There is only one trim solenoid in those remote boxes. The current for the trim up movement goes through the trim switch and that relay. On the down movement, the current only goes through the switch on the control box handle. So, if you have no down, you may have fried the trim switch on the control box handle. No big deal.

 

[boobie]

Re: 1978 115hp tilt power problem

Does it work if you try to go up ? Or are both dead ? You could also try by-passing the control switch with a jumper wire and see what happens.

 

[hutche]

Re: 1978 115hp tilt power problem

previous owner changed switch from throttle lever to dash mounted switch seems ok.got no power on either the up or down .am going to do a bypass test let you know what happens ,thanks very much

 

[boobie]

Re: 1978 115hp tilt power problem

You can also do this bypass test in the t/t control box . Pos to blue for up, Pos to green for down. Neg to grd on both tests. Do these tests on the wires going directly to t/t mtr.

 

[hutche]

Re: 1978 115hp tilt power problem

ok done bypass test and passed with flying colours trim worked both up and down,so we are back to electricals.is their anyway of testing the solenoid to see if its faulty?

 

[boobie]

Re: 1978 115hp tilt power problem

Where did you do the bypass test at? At the switch or back at the solenoid. The solenoid is for the up position only.The control switch on the handle activates the soleniod for up only( blue wire). For down the the current goes through the handle directly to the mtr(green wire).

 

[hutche]

Re: 1978 115hp tilt power problem

took 3 wires( blue /green/black)straight from motor off solenoid hooked up black to negative on battery via jumper cable and other jumper cable from positive on battery to blue and then green.

 

[hutche]

Re: 1978 115hp tilt power problem

tried new switch still not working

 

[boobie]

Re: 1978 115hp tilt power problem

Good. Now take a test lite or volt meter and start working your way back to the switch. Have some one activate the switch and at the same time checking for voltage on both the blue and green wires at all connections. Does the solenoid click when the blue wire on it has power to it? You also have to have 12 volts going into the switch to make it work. Keep following the circuits and I'm sure you'll find it. Best thing is the t/t mtr still works.