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Bill Graefer

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  • Bill Graefer

    Having trouble with a 1986 Evinrude 150 HP outboard tilt & trim . Unit will not lift or lower . I do hear clicking when engaging up or down at the relays. The trim motor does spin when direct 12 volts is applied down stream of the relays . Does this sound like the relays are gone?

  • #2
    It would be very unusual for both relays to fail at the same time but if it were me, I'd at least try replacing one relay just to see what happens. It's always good to have a relay on hand in the on-board tool box anyway.

    Other than that... your problem would be that one of the leads going to the PTT electric motor has lost contact between the PTT junction box and the electric motor. This type of connection break would result in a loss of movement in either direction due to the electric motor being a dual polarity motor.

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    • #3
      frustrated

      Thanks Jim , I tried a new relay . I tried it on both sides and still no Tilt or Trim. Should I see power at the 2 wire connector that leaves the PTT module ? I do not have power there when I try to Tilt or Trim .

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      • #4
        Originally posted by bgraefer@telus.net View Post
        Thanks Jim , I tried a new relay . I tried it on both sides and still no Tilt or Trim. Should I see power at the 2 wire connector that leaves the PTT module ? I do not have power there when I try to Tilt or Trim .
        Question!.... You stated that the electric motor works when the battery is hooked directly to it. Does the engine lift and lower when you do that?

        If you're speaking of the two wires that exit the relay junction box and lead directly to the electric PTT motor.... Absolutely yes! That is, with the UP mode engaged.... of the two wires leading to the electric motor, and having Volt Meter leads connected to each one, you would have positive (+) voltage leading to one, with negative (-) voltage leading to the other. With the DOWN mode engaged, the positive (+) & negative (-) reading would be reversed on the electric motor's wires.

        I a$$ume you're aware of a dual polarity electric motors function, and I'm making no attempt to insult your intelligence here.... just in case, a dual polarity electric motor has two leads, usually a Blue & a Green wire. Battery voltage is fed directly to these two wires... NOT just positive voltage (+) to one wire, with the battery negative (-) being connected to a ground. Reversing the voltage to the two wires causes the electric motor to run in the opposite direction.

        The usual problem "IF" there is a full 12v leading to the junction box... and very low voltage exiting the box in either the UP or DOWN mode is corrosion either at a connection or within a wire itself. Make sure that "all" wire end terminals are clean and also whatever they attach to.
        Last edited by Joe Reeves; 06-11-2017, 06:14 PM.

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        • #5
          Still not working

          I can split the connector on the Blue & Green wires just outside the relay junction box then apply the 12 volts (positive & negative) and it lifts up and down perfectly. There is a black tar like substance on the relays and the connectors . I'm not sure if this is supposed to be there or not. Checked all connections and they are clean and tight. I'm pretty much at a stand still. Do you have any other suggestions.

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          • #6
            Originally posted by bgraefer@telus.net View Post
            I can split the connector on the Blue & Green wires just outside the relay junction box then apply the 12 volts (positive & negative) and it lifts up and down perfectly. There is a black tar like substance on the relays and the connectors . I'm not sure if this is supposed to be there or not. Checked all connections and they are clean and tight. I'm pretty much at a stand still. Do you have any other suggestions.
            That tar like substance is a special grease that fights rust, corrosion, etc.

            Okay the PTT unit functions when you apply 12v directly to the electric motor.

            This indicates that the problem is that either a full 12v is not obtaining access to the PTT box... OR... for some reason isn't flowing through the relays. I would be tracing the power lines incoming to the PTT box back to their source...... the connections at the battery if that source is still used or most likely elsewhere (ignition switch?) if power to the PTT is normally cut when the key is OFF.

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