New Wiring Harness Wiring?

[andy6374]

I just bought a new Quicksilver key switch remote harness. For background, I have an 88' V6 merc 200hp with the oil injection disengaged (i.e. I run a premix). Questions?:<br /><br />1.) The new harness has a plug in which the all the gauge leads (grey, brn/wht, purple, tan/blu and black) go into and the tan wire comes out by itself with its own lead. The plug has pins on it, like at the engine side of the wiring harness. My old setup just had the grey,brn/wht,purple and tan wires coming out of the harness near the key switch. Then I just ran these wires to the gauges. Is there now a harness for all the gauges? What is the tan/blu wire for? The tan/blu wire comes from the harness near the key switch and then goes through the buzzer and then up to the "new" plug connector for the gauges. Should I just cut the wires, make new leads and just connect everything the way I had it before?<br /><br />As far as the wires at the engine are concerned. I have a tan/blu wire coming out of the starboard cylinder head near cylinder 1. This tan/blu wire connects to a tan wire that runs to a terminal block on the port side cylinder head near cylinder 2. Coming out of that terminal is two tan leads with male leads (I can think of the name for the leads, but it is the same type which connects the trim solenoids to harness at the engine). One of those tan leads must go to the female tan lead at the harness at the engine.<br /><br />Help me out?<br />Thanks-<br />andy

 

[andy6374]

Re: New Wiring Harness Wiring?

What the heck does the purple wire do at the engine. I know the the grey and purple supply power to the tach (which one supplies the RPM's grey or purple).<br /><br />Thanks, I am confused<br />-andy

 

[andy6374]

Re: New Wiring Harness Wiring?

Alright the purple is "Ignition (Switch) to 12 Volt Positive". What does that mean

 

[Dunaruna]

Re: New Wiring Harness Wiring?

Andy,<br /><br />Purple is 12v ignition (battery voltage only when ignition is 'on'). This wire feeds anything in the dash that needs 12v.<br /><br />Brown/white is the trim guage sender wire.<br /><br />Tan/blue is the temperature warning (horn) wire. This wire can also be just tan if it is feeding a temp guage (not horn).<br /><br />Grey is tach sender wire.<br /><br />Black is ground.<br /><br />On the back of your tach you will see at least 3 connections.<br /><br />1. '+' or '12v' or 'I' - that's the purple wire.<br /><br />2. '-' or 'GND' or 'earth' - that's the black ground wire.<br /><br />3. 'S' or 'SIG' or 'send' - that's the grey signal wire (sometimes called the sender wire).<br /><br />The genuine mercury guages have a loom that plugs directly into the plug you described, otherwise you will need to either cut the plug off or splice the tach wires into the plug. Be careful, the temp horn should not be made inoperative.<br /><br />Aldo

 

[andy6374]

Re: New Wiring Harness Wiring?

Alright sounds good. More though? Like I said the tan/blu wire comes through the wiring harness, goes through the warning horn and then up to the tachometer harness plug. If I cut the plug off and splice my own leads, were does that tan/blu wire go. I already have a tan wire coming out the harness that goes to the temp gauge. It seems as if the new harness has a temp horn incorported into it already.<br /><br />What about where the harness enters the engine. I see only the tan, green/wht and blue/wht connectors coming off the harness. Where did the tan/blu go? Is it in one of the pins?<br /><br />As for how I said:<br />"I have a tan/blu wire coming out of the starboard cylinder head near cylinder 1. This tan/blu wire connects to a tan wire that runs to a terminal block on the port side cylinder head near cylinder 2. Coming out of that terminal is two tan leads with male leads (I can think of the name for the leads, but it is the same type which connects the trim solenoids to harness at the engine). One of those tan leads must go to the female tan lead at the harness at the engine.<br />"<br />What is up with this as well?

 

[andy6374]

Re: New Wiring Harness Wiring?

BY the way. THanks for the reply Dunaruna <br /><br />Thanks-<br />andy

 

[andy6374]

Re: New Wiring Harness Wiring?

There are many topics with the temp sender and overheat switch but I am still confused to as which one is which. My serial # is 0B303415 (88' V6 200 HP merc). Now maybe this model didn't have these when it first came from the factory, but mine was rebuilt 3 years ago. The starboard side has a tan/blu wire which has a bullet connector connecting it to the port side of the engine with a tan wire. On the port side there seems to be two tan male bullet connectors and a black ground. What is what? Should the tan/blu wire just get routed to the remote control harness at the engine. There I have a tan female butt connection. But then near the key switch side of the harness, there are both tan and tan/blu wires. The tan/blu goes through a built in warning horn and the tan wire is by itself. Where do each of these go. Both can't go to the temp gauge.<br /><br />I have never worried about before because a.) I always had a strong stream of water out the tell tale, b.) I didn't have the "I want everything perfect" additude.<br /><br />Thanks<br />andy

 

[gss036]

Re: New Wiring Harness Wiring?

I was just looking at my Merc factory manual and it does not cover your sr#. I was messing around with my temp sender a couple months ago and was under the dash. I have a tan/blu that is capped off and does not connect to anything. I had a problem with the motor connection (shorted) and my mechanic just cut out the plug and wired everything from the engine straight (wire to wire) to the dash side of the wire bundle. I went that route thinking that if the engine ever comes off, I will be repowering so it won't matter.<br />The port side wires are for the temp sending unit and the starboard side is for the overheat sender. They both make the buzzer work. The tan/blu wires are used to transmit signals to the buzzer. The key on buzzer, oil pump sender, etc. On mine, the wire that goes to the terminal block on the (rt) starboard side is an isolated terminal just used for connecting the circuit.<br />If you motor is efi, then wiring would be different since I have a carbed engine.

 

[gss036]

Re: New Wiring Harness Wiring?

I did a little more reading after lunch and the schematic shows that the capped tan/blu is for a visual warning kit(light?). Tan goes to the Temp guage.

 

[andy6374]

Re: New Wiring Harness Wiring?

I will try hooking up the tan wire to the gauge. However, I disconnected the tan/blu wire that runs from the starboard side to the port side (where it connects to the tan wires) and connected it to the tan bullet connector at the engine side of the engine harness and my temp. gauge showed some life. Do you think it was actually working (i.e. the tan/blu is for the temp gauge) or is it actually for the buzzer and was just giving the temp gauge some voltage and hence gave the gauge a reading.<br /><br />As an update. I said eariler that the port side of the engine had two tan wires and a black ground coming out of it, but it is rather a tan and a tan/blk wire.<br /><br />-andy

 

[andy6374]

Re: New Wiring Harness Wiring?

Oh yeah.. Thanks so much for looking into it. I am having trouble troubleshooting this problem.<br /><br />-andy

 

[gss036]

Re: New Wiring Harness Wiring?

The tan/blu probably just gave power, not temp reading. The tan wire definately goes to the gauge. If you ground the tan wire w/the ignition on, the gauge should peg out to the right. Don't hold there very long, just enought to see it move. The purple is just a jumper that is providing power from the battery, via the tach. The purple wire comes off the harness to the battery terminal on the tach and then the purple wire jumps either to the trim gauge or the temp gauge. The black wire goes to the tach ground terminal. Gry goes to the sender. That is the diagrahm for a single outboard using Quicksilver Commander 2000 Remote Control. If you do not use a wire, tape it back so it won't cause any problems. Hope this helps you out.

 

[andy6374]

Re: New Wiring Harness Wiring?

Thanks gss036 I will try it out today. Do you think the tan/blu is for the warning horn? You said "The tan/blu probably just gave power, not temp reading", but the temperature increased as the engine warmed (so maybe, just maybe it is working). What temperature is the temp sender measureing? Cylinder head temp or water temp? What should be the temp reading when it is warmed up?<br />The tan/blu wire at the key switch side, like I said, goes through the alarm and then to nothing, but since it's origin is from the harness, the tan/blu wire must have one of the pins at the engine side of the engine harness.<br /><br />-thanks

 

[gss036]

Re: New Wiring Harness Wiring?

Some engines come equipted with a light that monitors the oil and that is what the tan/blu wire is for. The horn is connected to the oil pump monitor on the port side of the engine, it is also connected to the overheat sender located in the starboard (rt) head. It goes off around 240 degrees and will reset itself when it cools down. The temp sender is located in the port head on my 89 Merc 200, so I suspect yours is also. The unit measures head temp. There is a platic insert that the unit fits in so it does not have direct metal to metal contact. I would suspect the temp would be somewhere close to 143 degrees or less since that is the temp that your thermostats shouls open allowing water flow.<br />Go to the libary and check out a manual of some sorts so you can look at the pictures and get more of an idea of what you are working with.

 

[andy6374]

Re: New Wiring Harness Wiring?

Gary-<br />Thanks went to the boat today and hooked up the new harness. The tan wire was on the port side head (you were right on). I connected it to the harness, harness to gauge and it read ~140 degrees at running for only a minute. However, the buzzer would shut up. As soon as I turn the key it goes off. I suspect it is the fact that the tan/blu wire coming out of the harness, at the key switch side, goes nowhere. If I ground the tan/blu wire the buzzer gets louder. What do I do with this damm wire? I connected it to the tan/blu wire coming from the starboard cylinder head and it didn't work. Do I send it to the temp gauge along with the tan wire? Thanks for the help, I am almost there.<br /><br />-andy

 

[andy6374]

Re: New Wiring Harness Wiring?

There are many typos in that last post. Should have read:<br /><br />"""The tan wire on the port side head was for the temperature gauge(you were right on)."""<br /><br />"""However, the buzzer wouldn't shut up (ie the buzzer keeps going and going)."""

 

[andy6374]

Re: New Wiring Harness Wiring?

Also, I did see in the Appendix of my Seloc manual that the tan/blu wire can be for an "optional visual warning". But I don't think that this is my case, because the tan/blu goes through the alarm. Besides if someone didn't have the "optional visual warning" setup, but had the tan/blu, there would have to be a way to ground it so that the buzzer doesn't go off all time, as in my case.

 

[andy6374]

Re: New Wiring Harness Wiring?

Also, like I said there is an two additional wires coming out of the port head that are doing nothing. A tan and tan/blk wire with bullet connections. They are short.

 

[andy6374]

Re: New Wiring Harness Wiring?

I just did a search for this topic. And I read that when disengaging the oil injection system (as I have in mine) you will need to cut the purple (ignition switch) wire going to the warning alarm. On my new harness the warning horn does have a purple and tan/blu wire coming out of it. Also, as soon as I turn the key to "on" (engine not running) the buzzer starts its continuous alarm. Still need to figure out what the tan/blu wire does at the key switch side of the engine harness and at the starboard head.<br /><br />Have you heard of the purple wire from the harness being for the oil injection (as far as the alarm is concerned)?<br /><br />On the port side I don't have all the wires that go to the switchbox or the blue to the oil tank or.... just tan, tan, and tan/blk. One of the tans seems to be doing the job for the temp gauge.<br /><br />-andy

 

[gss036]

Re: New Wiring Harness Wiring?

Just sat down for a coffee break and see your post. 1st, forget about the tan/blu wire and tape off the end, it does not go anywhere if you don't have the light indicator.<br />You said that you premix. Where are all the wires from oil tank and oil module? Also, you should not have the engine mounted reservoir under the cowling,right? There was a cap w/2 wires(blk and a lt blu) that went around and connected to the oil module, it was also connected to a sensor that monitors the oil pump rotation, they also go to the buzzer. That is where it gets confusing. How was it rewired when all this came off? I would think that module would need to remain as it looks like it kind of works as a switch box for the other alarm wires. I looked at the wiring diagrham in the manual at this point and then went out and checked my engine.The single wire from the overheat sensor (self grounds on the block) comes up and attaches to a terminal block that has the tan/blu from the oil module and then goes into the wire bundle as tan/blu. I don't know what it does inside the inst panel in the boat. The buzzer on my boat is encased in a mesh so I can't see the wires. I do get the beep-beep-beep for the key. If it is still a constant steady beep, I would suspect the wire from the onboard oil tank,motion sensor or the overheat sensor wire. The tan wire on mine goes to the gauge. I may have a bad sender on my engine, I never did get mine to read right. Do you have a wiring diagram to look at?