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Trim limit wires...no where to be found

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  • Trim limit wires...no where to be found

    Hi Everyone
    I could use a little advice please...I changed the Trim limit and sender switches on my 1988 Searay 230 Weekender with 7.4 Bravo....When I followed the lines into the boat the Trim limit wires were not plugged in...just dangling...which would explain no up on my trim....Ive looked everywhere and can not locate where they plug in...the schematic says to engine harness but there are no plugs anywhere....I'm beginning to think someone monkeyed with the harness prior to me owning....The wiring looks as if its been worked on....everything else works fine...I'm just finishing engine alignment so manifolds are off and visibility is as good as its going to get but I cant find the plugs...does someone have a picture they could share or detailed instructions...The schematic didn't help at all.
    Thanks D

  • #2
    Re: Trim limit wires...no where to be found

    check the wiring coming from the trim pump,I think that's where my were disconnected.
    84 Beachcraft 229cid 3.8L V6 R Alpha 1.

    Comment


    • #3
      Re: Trim limit wires...no where to be found

      Originally posted by bspeth View Post
      check the wiring coming from the trim pump,I think that's where my were disconnected.
      Thats were the Trim sender plugs in...that ones good...I have down and trailer working...the Trim limiter is the one without a home....should tie into the harness somewhere...the wires look like they should be routed under shift lever and up near the fuel pump...but there are no un used wires available....unless your saying all 4 wires go back to the pump?..if so I dont see any spare wires there either.

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      • #4
        Re: Trim limit wires...no where to be found

        Which controls do you have? On my old boat there was no provisions for a trim limit switch and they where just zip tyied up.
        83 Sunrunner 16.5 120 merc Alpha 1 drive SOLD 8/1/13

        1996 Crownline 202BR
        5.7l EFI 0f791070
        Bravo I drive

        GMC Yukon tow rig

        Comment


        • #5
          Re: Trim limit wires...no where to be found

          Well you could run new wires. The trim switch wire is a purple white wire, should be somewhere back near the transom. There should also be a blue/white wire back there. That is the trailer wire from the control. What you need to do is connect the p/w wire to one
          switch wire and splice the other to the b/w wire.
          Terry
          87, 4WINNS H 190
          470/Alpha I

          Comment


          • #6
            Re: Trim limit wires...no where to be found

            Trim limit wires go to pump. Sender to dash guage. My sender wires tie into shift plate terrminal block then through engine wiring harness to dash guage. Pump should have bullet connectors for limit switch wires.

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            • #7
              Re: Trim limit wires...no where to be found

              Originally posted by 84EdH View Post
              Trim limit wires go to pump. Sender to dash guage. My sender wires tie into shift plate terrminal block then through engine wiring harness to dash guage. Pump should have bullet connectors for limit switch wires.
              Ok...I'm sorry...I misstated i had my terminology backwards....the TRIM LIMIT is plugged into the pump....
              1) Trailer function works
              2) down works
              3) Up does not work

              TRIM sender is the one that I can't find where to plug in....the wires look as if the are to be routed up by the shift plate....but there are not any unconnected wires in that area....the kit came with little wires to modify if you boat didn't have the plugs...it changes the wires to terminal type...Talked to a Merc Master he said one is ground and the other goes back to controls....all the wires coming from the sending gauge are black..so thats no help..
              84edH...can you share a picture of how yours connects? I don't know which one goes back to controls ..driving me crazy...manual and schematics don't show anything

              Comment


              • #8
                Re: Trim limit wires...no where to be found

                Originally posted by Searay D View Post
                Ok...I'm sorry...I misstated i had my terminology backwards....the TRIM LIMIT is plugged into the pump....
                1) Trailer function works
                2) down works
                3) Up does not work

                TRIM sender is the one that I can't find where to plug in....the wires look as if the are to be routed up by the shift plate....but there are not any unconnected wires in that area....the kit came with little wires to modify if you boat didn't have the plugs...it changes the wires to terminal type...Talked to a Merc Master he said one is ground and the other goes back to controls....all the wires coming from the sending gauge are black..so thats no help..
                84edH...can you share a picture of how yours connects? I don't know which one goes back to controls ..driving me crazy...manual and schematics don't show anything
                Sounds like you have a break in the blue/white wire connection, see wiring attachment
                Click image for larger version

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                As for the gauge look for a Brown/white wire, it goes to the gauge. Here is a 4.3 diagram but it will be the same for you
                Click image for larger version

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                94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                07 Seadoo GTX
                Merc Adults Only VP Adults Only
                G-Dad always said "First Liar doesn't stand a chance"

                Comment


                • #9
                  Re: Trim limit wires...no where to be found

                  Originally posted by AllDodge View Post
                  Sounds like you have a break in the blue/white wire connection, see wiring attachment
                  [ATTACH=CONFIG]219177[/ATTACH]

                  As for the gauge look for a Brown/white wire, it goes to the gauge. Here is a 4.3 diagram but it will be the same for you
                  [ATTACH=CONFIG]219180[/ATTACH]
                  Found the Brown and white wire it attaches to a little blue box that says Mercathod ...maybe a stupid question but what the heck does that do and how do I wire my Trim sender to it?

                  Comment


                  • #10
                    Re: Trim limit wires...no where to be found

                    Mercathode is the corrosion prevention. It has nothing to do with trim.
                    83 Sunrunner 16.5 120 merc Alpha 1 drive SOLD 8/1/13

                    1996 Crownline 202BR
                    5.7l EFI 0f791070
                    Bravo I drive

                    GMC Yukon tow rig

                    Comment


                    • #11
                      Re: Trim limit wires...no where to be found

                      Originally posted by thumpar View Post
                      Mercathode is the corrosion prevention. It has nothing to do with trim.
                      I see....if the brown and white wire is my gauge why is it wired to the Mercathode? can I just run a junction off the brown and white wire and connect it to my trim sender?

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                      • #12
                        Re: Trim limit wires...no where to be found

                        OK I was wrong. The early models did have that wire to the trim position gauge.
                        83 Sunrunner 16.5 120 merc Alpha 1 drive SOLD 8/1/13

                        1996 Crownline 202BR
                        5.7l EFI 0f791070
                        Bravo I drive

                        GMC Yukon tow rig

                        Comment


                        • #13
                          Re: Trim limit wires...no where to be found

                          Originally posted by thumpar View Post
                          OK I was wrong. The early models did have that wire to the trim position gauge.
                          So should I use that wire?...does it need to stay where it's at?...there must be something i'm missing...there should be a plug or terminal to connect to?

                          Comment


                          • #14
                            Re: Trim limit wires...no where to be found

                            Originally posted by Searay D View Post
                            Found the Brown and white wire it attaches to a little blue box that says Mercathod ...maybe a stupid question but what the heck does that do and how do I wire my Trim sender to it?
                            Originally posted by Searay D View Post
                            I see....if the brown and white wire is my gauge why is it wired to the Mercathode? can I just run a junction off the brown and white wire and connect it to my trim sender?
                            Disconnect the brown/white wire from the mercathode and connect it to the trim sender. The mercathode uses an orange and a brown wire (no stripes) which lead to the boats anode. The other two connections go to ground and battery positive

                            Mercruiser Mercathode Wiring | Performance Product Technologies
                            94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                            95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                            07 Seadoo GTX
                            Merc Adults Only VP Adults Only
                            G-Dad always said "First Liar doesn't stand a chance"

                            Comment


                            • #15
                              Sign up today
                              Re: Trim limit wires...no where to be found

                              Originally posted by AllDodge View Post
                              Disconnect the brown/white wire from the mercathode and connect it to the trim sender. The mercathode uses an orange and a brown wire (no stripes) which lead to the boats anode. The other two connections go to ground and battery positive

                              Mercruiser Mercathode Wiring | Performance Product Technologies
                              Ok..got it I'll try that. Thanks

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