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09-08-2019, 11:14 PM | #31 |
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Join Date: Mar 2010
Location: Beachtown
Bike: M900
Posts: 2,188
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Yes I can see that- just looking through the schematic of my 1997 900 and it's there across the solenoid terminals and I can see why it could be on the blue wire (assuming it is the same of course but we all know what assumption is) from the light switch as that is directly from the 7.5A fuse D4 (turn signals, side, tail and warning lights) and then there is a return wire from the light switch back to the ignition switch where the side light circuit (with ignition on) picks up from the Parking light circuit (steering lock on).
But crucially there is the wiring from the ignition switch through to the General Relay, Fuses, Battery and Starter Solenoid (and obviously going to the Starter and Kill switches) which is all live with the ignition on thus the reason for the diode to protect it all. You can also see from the schematic why (although it seems to vary bike to bike) that the General relay arcs so badly (speeding up its' demise) from the charge in the coils when you switch the motor off using the key. Whereas using the kill switch to stop the motor running prevents this while the switch contacts remain unaffected. If you're intrigued by that, prise the yellow cover off the relay and see if the contacts spark over when you turn the motor off with the key, then try it again using the kill switch.
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10-08-2019, 08:56 AM | #32 | ||
The Loire Valley Monster
Join Date: May 2006
Location: South of Le Mans
Bike: S4
Posts: 709
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Quote:
Quote:
and probably best to put another diode back into the same place and same orientation? The text stamp on mine reads "6A05" which seems to correspond to diodes I've found on ebay for about £4 for x5
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10-08-2019, 09:08 AM | #33 |
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Join Date: Jun 2013
Location: Wolverhampton
Bike: S4Rs
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Hi, from the Handbook, " Warning- this switch is mainly intended for use in emergencies when you need to stop the engine quickly"
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10-08-2019, 09:39 AM | #34 | ||
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Join Date: Mar 2010
Location: Beachtown
Bike: M900
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Quote:
But yes I would definitely look at getting the diode back in the circuit somewhere- they are cheap enough but if you have trouble let me know- we’ve probably got some at work. In addition I would use some heat shrink sleeve over it to give it a little more protection. Quote:
The ignition switch is simply a way of making turning it on and off secure so only the owner (in an ideal World) can operate it- many old classic bikes (along with competition machines) don’t have keys.
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You're perfect, yes, it's true- But without me you're only you! Last edited by Flip; 10-08-2019 at 09:42 AM.. |
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10-08-2019, 12:36 PM | #35 | |
The Loire Valley Monster
Join Date: May 2006
Location: South of Le Mans
Bike: S4
Posts: 709
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Quote:
ebay item number : 113688671255
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10-08-2019, 03:04 PM | #36 |
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To be honest I’m a little confused as to why they used a 6amp rated diode when, if the blue wire on your bike is the same as mine and on a 7.5amp circuit. Or if like you thought, is the wire for the headlight and therefore on a 15amp circuit making it an even worse choice.
It is still worth finding out which fuse that wire actually goes to just for future knowledge but I think I would be looking at a higher rated diode such as this: https://rover.ebay.com/rover/0/0/0?m...2F192608781257 These are basically the same kind of ‘blocking’ diode used on those little battery charging solar panels to prevent the battery sending voltage to the panel instead of the other way round.
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10-08-2019, 03:24 PM | #37 | |
The Loire Valley Monster
Join Date: May 2006
Location: South of Le Mans
Bike: S4
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Quote:
Your choice makes more sense to me, thx
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10-08-2019, 03:50 PM | #38 |
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Join Date: Aug 2011
Location: Southampton
Bike: M1100evo
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It would be interesting to see what the actual current draw on the blue wire is. After cutting the wire but before attaching the diode, you could put a multimeter set to amperes between the two ends and see what it reads with the indicators, pilot and tail lights on.
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10-08-2019, 05:23 PM | #39 | ||
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Join Date: Mar 2010
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Bike: M900
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Quote:
I checked on my YZF600R and the turn signals etc. including the fuel pump is on a 15amp fuse whereas the headlight is on a 20amp but the pattern is the same as my Monster. Perhaps someone else with an S4 could have a look at their fuse box to confirm or deny my theory? Quote:
Excess heat on the rectification (diode) side is exactly why we get failures in the shunt type regulator/rectifiers.
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You're perfect, yes, it's true- But without me you're only you! Last edited by Flip; 10-08-2019 at 05:31 PM.. |
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10-08-2019, 05:46 PM | #40 | |
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Bike: M1100evo
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Quote:
The blue wire goes into the fuse box at number 14 and the 6-14 fuse should be 15 amps. |
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10-08-2019, 08:18 PM | #41 |
The Loire Valley Monster
Join Date: May 2006
Location: South of Le Mans
Bike: S4
Posts: 709
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Yes indeedy ....
Thanks @Flip for explaining why it burnt out .... makes sense if it is only 6A and many thanks to both of you for taking the time to help - glad to see the willingness to assist is still alive after all the years I will order one of the diodes suggested at the correct rating and add it back into the circuit where the old one was and then I may even change the insurance to road use (rather than storage) and actually take her for a spin or two
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11-08-2019, 08:22 AM | #42 | ||
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Join Date: Mar 2010
Location: Beachtown
Bike: M900
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Quote:
It would interesting to know whether the headlight is on the 20amp circuit of the injectors and coils etc. thus following the same pattern at least. Quote:
Now get it sorted and enjoy it on those lovely French roads around there.
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03-09-2019, 07:02 PM | #43 |
The Loire Valley Monster
Join Date: May 2006
Location: South of Le Mans
Bike: S4
Posts: 709
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Righto chaps .... postie delivered the new Diode today (and his 9 brothers .... for £0.90 for 10 what could I do ^^) so tomorrow is soldering day .... it's not going to be neat but hopefully it'll function and I'll hide it all under heat shrink once we're good
Look out Frenchie roads the beast is back
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04-09-2019, 07:08 PM | #44 |
The Loire Valley Monster
Join Date: May 2006
Location: South of Le Mans
Bike: S4
Posts: 709
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Well it wasn't far and it wasn't fast but for the first outing she's had in over 4 years ..... god it felt good
Thanks all for your help
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04-09-2019, 07:40 PM | #45 |
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Glad you got it sorted and good to see it up and running in the lovely looking French Sunshine.
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