spidr_mnky
21.05.2021 23:44:01
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See full version: TRIM SENDER 8M0074846
There are no questions for this product. Ask a new question and receive an answer, directly from our support staff. more
Delivered the parts to my mechanic dude. About one hour later he called me and told me it was fine again. Went over and got the invoice and the boat and had a nice little test run. Very easy and a nice cup of coffee while waiting. :-) Just love Crowley Marine, have had the same experience a couple of times earlier. more
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can anyone tell me how the sender for the trim position sensor works? mine isn't accurate suddenly, and won't hit the bottom of the gauge even with the sensor adjusted all the way.
1. i would guess that the sensor is just a rheostat, but looking at the wiring diagrams, it appears that one sensor wire is grounded, and the other appears to go to. the oil temp gauge? (see diagrams). with the ignition on, it seems that there is power to the sensor. i'm missing something. are there testing parameters (ie, in trailer position there should be a reading of x volts/ohms, and at full in it should be y)?
2. my battery gauge is also suddenly reading low by 1-2 volts. i'm guessing these probs are related; i'll check main power and ground wires this weekend, but i'd like to know how the TPS works as well.
3. my "trim up" control also doesn't work, trailer does. i assumed that it had to do with my trim limit switch, but again, i'm not sure how it works--looks like a simple on/off switch? at below trim limit, looks like pressing the button connects blue/wht wire to 12v?
these wiring diagrams are tough to read--are there any "true" wiring diagrams available (eg, that show whether something is acting as a switch/resistor/etc, instead of just showing wires ending at a picture of the component)? [links]
It should be located (if looking at the back of the motor) on the left side. Trim the motor all the way up and look where the center trim cylinder connects to the motor at the top. The trim sender is mounted to the end of the pin that holds the cylinder to the motor. It is black and has two screws that mount it to the side of the motor bracket. There is also a wire that is mounted to one of the screws (ground wire) and the other one has a black plastic wrap that goes to the motor harness for the gauge. Hope this helps. <br /><br />PS If you use the motor in salt forget replacing it they don't last long. Very poor design.
Re: mercury trim sender unit location [links]
Thanks. I'll look there. I do use in salt so maybe I'll forget the whole thing.