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Author Topic: 3cv safety relay  (Read 371 times)
joebloggs
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« on: September 01, 2023, 04:00:42 PM »

Anyone know what signal the safety relays receives from the clutch switch?
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1989 3CV
fj1289
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« Reply #1 on: September 02, 2023, 09:45:49 AM »

Dude, with all these electrical questions you REALLY NEED to find a Yamaha FSM and study the wiring diagram(s).  The electrical sections are laid out VERY WELL and very clearly break out all the sub-systems.   
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Pat Conlon
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« Reply #2 on: September 04, 2023, 09:33:57 AM »

I don’t understand the question, what signal?  It’s a 12 volt electrical signal…on a normally open circuit.
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1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don’t store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the ‘84-87 FJ’s:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3
joebloggs
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« Reply #3 on: September 07, 2023, 06:15:32 PM »

I don’t understand the question, what signal?  It’s a 12 volt electrical signal…on a normally open circuit.
I mean voltage, I don't want to find out the hard way that Yamaha reduced the voltage to the igniter
And yes, I need a good wiring diagram
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1989 3CV
racerrad8
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« Reply #4 on: September 08, 2023, 06:13:13 AM »

The ignition system voltage is full, battery voltage.

These engine and ignition system have been used in race cars for 30+ years and the are run from a bare bones wiring requirement and a toggle switch.

Randy - RPM
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Randy - RPM
fj1289
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« Reply #5 on: September 18, 2023, 02:16:16 PM »

The ignition system voltage is full, battery voltage.

These engine and ignition system have been used in race cars for 30+ years and the are run from a bare bones wiring requirement and a toggle switch.

Randy - RPM

Link to the bare bones system Randy referred to:

https://fjowners.com/index.php?topic=16278.0

And diagram for 84/85:

https://fjowners.com/index.php?topic=6477.0

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joebloggs
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« Reply #6 on: September 18, 2023, 02:26:43 PM »

The ignition system voltage is full, battery voltage.

These engine and ignition system have been used in race cars for 30+ years and the are run from a bare bones wiring requirement and a toggle switch.

Randy - RPM

Link to the bare bones system Randy referred to:

https://fjowners.com/index.php?topic=16278.0

And diagram for 84/85:

https://fjowners.com/index.php?topic=6477.0



I've seen that a couple of times while looking for answers, tbh now I've decided to wait until a 1TX fairing turns up I will stick with the stock 3CV loom, no point in reinventing the wheel as they say, I'm going to still have to find a new home for the igniter under the fairing but by keeping the loom where it was designed it makes hiding the battery, fuel pump relay and starter solenoid a little easier.

Of course finding a 1tx fairing is going to take time, or a bit of luck
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1989 3CV
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