Mystery wiring connector

[Ralphy]

Engine is a '96 48HP SPL. Recently bought the boat used. While digging around in the engine compartment looking for a dropped screw, I dug out two connectors that are not in use. One is a three prong (white, blue, yellow) which I am pretty sure is for tilt/trim which I don't have :-( The other is 2 prong (black, brown/black stripe) which I thought might be for overheat warning horn which I also don't have but know I should. I am not sure if it is for overheat alarm tho as the temp sensor has brown/blue stripe wire. Anyone have any guidance for me? Thanks in advance.

 

[ezeke]

Re: Mystery wiring connector

Sounds like both connectors for the Tilt and Trim harness. The two wire is for the gauge and the three wire ran to the control handle for the switch.

Is the T&T relay box in the engine compartment?

 

[OBJ]

Re: Mystery wiring connector

Wires running to the TNT switch at the handle are red, green and blue.

I "think" the two prong is for connection to a VRO oil reservoir tank for low level alarm.

But I'm having a brain cramp for the other one. Colors don't sound right for VRO pump alarms. Are you sure of the colors?

 

[Ralphy]

Re: Mystery wiring connector

No T & T box...boat is not equipped with T & T, its a little 15 ft Glasstream.
Wiring schematics from manual show a red, green, blue on the MWS instrument page, but unless the colors have faded in 20 years the three prong in my engine is definitely white, blue, yellow. Schematic does not show it at all...strange. No big deal, but would like to wire in an overheat alarm if possible.

 

[JUSTINTIME]

Re: Mystery wiring connector

here are wiring colors

 

[OBJ]

Re: Mystery wiring connector

The warning horn should already be connected to the control box Ralphy. To find out, find the lead from the temp sensor on the head, should be a rubber boot over the knife connector that connects the sensor to the wire harness.

Pull the rubber boot back to expose the knife connector. Turn the key to just "ON". Now ground the exposed knife connector to and engine ground. The warning tone should sound a steady tone.

 

[Ralphy]

Re: Mystery wiring connector

Well OBJ, thanx for the response but I have had the control box apart to put in a new ignition switch and there is no horm or alarm of any sort in there. I also have grounded the sensor and there is no alarm. Guess I will open the control box again and see if the tan/blue stripe wire is in there. Thanx for the advice.

 

[OBJ]

Re: Mystery wiring connector

Ralphy, if the horn is in the control box, it will be mounted just above the ignition switch. You might also check under the dash or along the wiring harness to see if by chance the horn was mounted outside the control box. Are there any holes in the control box? They would be on the front in the upper right hand corner of the control.

 

[Ralphy]

Re: Mystery wiring connector

Don't think there is any horn hooked up. I will take apart controls this weekend and post my findings. Pretty sure I will find a tan/purple wire taped up. Will let ya'll know and thanx so far.

 

[Ralphy]

Re: Mystery wiring connector

Well in looking inside the control box I do not appear to have an alarm. Under the ignition switch is a small black box (about 1 inch square and maybe 3/8 inch thick) with a black wire and black/yellow stripe wire. Not sure what it is. Then there is a solid tan wire loose and taped up. No tan/blue wire coming into the box at all.

 

[ezeke]

Re: Mystery wiring connector

Black is ground, bleck & yellow is kill wire to the power pack.

The black box should be the emergency kill switch connected to the lanyard on the outside of the control housing, depending on the control of course.

The tan wire is the negative lead for a horn which comes through the harness from the temp sensor on the engine. If the wire is taped off, you can buy a horn, connect one lead to the positive terminal on the ignition switch and the other to the tan wire. When the engine overheats, the sensor will close and sound the horn.

There are over a dozen duifferent models of OMC controls sold in 1996 alone. Could you be be a little more descriptive?

 

[Ralphy]

Re: Mystery wiring connector

Yep the black box is the emergency kill switch. Guess I will go to Radio Shack and see if I can find some kind of alarm unless someone knows of a better resource. You say to positive terminal on the switch, would that be the red or purple? Thanks for the answer Ezeke.

 

[Ralphy]

Re: Mystery wiring connector

Never mind I figured it out. Found a car alarm sounder at Radio Shack that fit just right. Figured since purple is the "run" power that that would be the one to use. Works fine. Turn switch to on, ground tan wire and BEEP BEEP BEEP. Nice to have a little more peace of mind while boating. Thanks for all the input gents.

 

[imported_beck]

Re: Mystery wiring connector

For complete piece of mind I would also test the sending unit, the actual alarm sensor. I'm sure these guy can tell you the best/easiest way. I also need to check mine, right after changing the water pump. That will be next weeks project, I have a few days off.

 

[Ralphy]

Re: Mystery wiring connector

Tested by putting in hot oil bath with continuity tester attached. All is good.