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Old 29 September 2013, 14:14   #1
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Bennett trim tabs

The starboard trim gauge has packed up, after a period of, being very bouncey. It's not the gauge because I've checked with one that's working, a brand new one in fact. Electrics are without doubt my boating Achilles heal, has anyone any tips on how to check if it's a sender problem or a wiring problem.

Any help appreciated. Thanks.
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Old 29 September 2013, 14:14   #2
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Sorry, forgot to say they are old fashioned analogue gauges.
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Old 29 September 2013, 14:23   #3
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Can you swap the cables over on the back of the gauges, so that the suspect sensor is connected to the other gauge, and vice versa, just for a quick test? Of course, the port gauge would read the starboard tab etc, but it would prove if its fact the actuator sensor thats at fault.

All the parts are available at Bennett Trim Tabs and Hatch Lifters - Magic Marine Ltd Hope this helps
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Old 29 September 2013, 14:49   #4
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Hi Robbie. I imported and wired up a brand new gauge with no luck. I'm interested to know how to use my multimeter on the two wires to find out if any thing changes from zero to 100% deflection but I don't know what I should be reading. Appreciate your thoughts though.
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Old 29 September 2013, 15:45   #5
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This post talks about the digital gauges and needed recalibration etc, but skip past all that and you get to some Ohm readings for the actuators. You'd simply disconnect the actuator completely. Set the multimeter to Ohms/Resistance and connect the two wires:

Different Bennett Trim Tab Problem - Solved! - The Hull Truth - Boating and Fishing Forum
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Old 29 September 2013, 16:17   #6
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usually the sendery thing in top of tab. bennetts are crap if you ask me
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Old 30 September 2013, 05:33   #7
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I think the sender is the most likely culprit, they are a mechanical device and can be changed out quite easily I think.
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Old 30 September 2013, 15:46   #8
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Decided to order a new sender. I know it's not the gauge and cant believe it's the wiring.

Thanks for all the input.
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