Hi folks,
I'm a newbie here, so thanks for having me!
I recently purchased Seadoo 951di 2002 which appears to have a DESS post / Lanyard problem. As I purchased this ski not working, I'm reluctant to spend money on a new lanyard and post when the ski might well have other, much more expensive issues (The injection system fuse was blown, although it was 10A instead of 15A).
When I install the Lanyard, I hear a single long beep & the start button doesn't start the engine.
After unplugging the DESS post, I checked the three wires on the connector attached to it. The white wire is connected to the center pin, the black wire is connected to the metal ring around the post.
When I install the lanyard onto the post, the resistance from the black wire to the black/yellow wire drops to approx 2 ohms, as it should.
That all seems correct, however for some reason there is a resistance of between 35 to 75 ohms across the white and black wires when the lanyard is fitted. Is that supposed to be the case?
If I check the terminals on the lanyard on it's own, the resistance is approk 8-10k ohms.
How can plugging the lanyard on to the post suddenly drop the resistance to 75 ohms?
Even more bizarre is the fact that when I push the lanyard onto the post with some force, the resistance across white & black wires drops to 35 ohms!
My question is, does the magnetic reed switch, apart from connecting black wire to black/yellow, also introduce a low resistance resistor across the black wire & white wire?
OK, after doing more research, it looks very much like the device in the lanyard is a Dallas iButton. It's magnetic & uses single wire comms. Looking at examples of circuits to read this device, I don't see the need for a low value resistance between the ground & data wires, which leads me to think that there could be an issue with the DESS post!
Still find it very odd that the low resistance only happens when the magnet is near the read switch though.
I was thinking of connecting the black wire to black/yellow, then running a wire from black to the outer terminal of the lanyard and another wire from the white wire to the centre pin of the lanyard. In theory, that should work.
What do you think?
Any help would be very much appreciated & excuse the long message! Thanks.
I'm a newbie here, so thanks for having me!
I recently purchased Seadoo 951di 2002 which appears to have a DESS post / Lanyard problem. As I purchased this ski not working, I'm reluctant to spend money on a new lanyard and post when the ski might well have other, much more expensive issues (The injection system fuse was blown, although it was 10A instead of 15A).
When I install the Lanyard, I hear a single long beep & the start button doesn't start the engine.
After unplugging the DESS post, I checked the three wires on the connector attached to it. The white wire is connected to the center pin, the black wire is connected to the metal ring around the post.
When I install the lanyard onto the post, the resistance from the black wire to the black/yellow wire drops to approx 2 ohms, as it should.
That all seems correct, however for some reason there is a resistance of between 35 to 75 ohms across the white and black wires when the lanyard is fitted. Is that supposed to be the case?
If I check the terminals on the lanyard on it's own, the resistance is approk 8-10k ohms.
How can plugging the lanyard on to the post suddenly drop the resistance to 75 ohms?
Even more bizarre is the fact that when I push the lanyard onto the post with some force, the resistance across white & black wires drops to 35 ohms!
My question is, does the magnetic reed switch, apart from connecting black wire to black/yellow, also introduce a low resistance resistor across the black wire & white wire?
OK, after doing more research, it looks very much like the device in the lanyard is a Dallas iButton. It's magnetic & uses single wire comms. Looking at examples of circuits to read this device, I don't see the need for a low value resistance between the ground & data wires, which leads me to think that there could be an issue with the DESS post!
Still find it very odd that the low resistance only happens when the magnet is near the read switch though.
I was thinking of connecting the black wire to black/yellow, then running a wire from black to the outer terminal of the lanyard and another wire from the white wire to the centre pin of the lanyard. In theory, that should work.
What do you think?
Any help would be very much appreciated & excuse the long message! Thanks.
