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wikiwiki |
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wikiwiki Scooby Slapper
Joined: 17 Jan 2007 Karma :
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Posted: 19:32 - 23 Mar 2008 Post subject: Oxford hotgrips "problem" |
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I say it's a "problem" as it's not if you have faith in the system provided.
This is for the new oxford hotgrips with the led cpu controller.
About 2 months ago, on a nice cold morning, the unit was turned on and decided to turn itself off
I turned it on again and after around 1 second, off.
Tried again, same timing.............. off.
Reckoning it to be a fault or something that the cpu isn't happy with rather than just a loose connection I called oxford when I got to work.
I got straight through to a guy who knew his stuff and asked if I used a relay, now, from past units, I have always wired them via a relay, triggered from the tail light, so's I don't forget to turn 'em off.
He recommended I remove it and wire straight to the battery, I said I would but never got round to it as on the way home, they worked, and they carried on working up until a bloody cold day this friday.
This also happens a week after I took off my bar muffs too
My fingers were red and my right thumb was throbbing with pain.
"cast not a clout 'till may is out" kept running round my little brain
I decided to rewire the grips, they worked perfectly and the oxford guy assures me that, if left on, they will turn themselves off once the cpu detects a certain level of voltage, allowing the engine to still be started.
It seems that by using the relay in line, the contacts may have not been giving a 0 ohm feed all the time, interpreted as a weak supply by the cpu, the grips have turned themselves off.
I may leave them on overnight tonight and see if it starts tomorrow
Sorry about the longish post but I thought I'd spread the word, incase anyone else has relayed these grips. |
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lllN30lll |
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lllN30lll World Chat Champion
Joined: 12 Jun 2005 Karma :
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Posted: 19:38 - 23 Mar 2008 Post subject: |
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yeh he's right, when the battery drops below a certain level they will turn themselves off, you won't be able to turn them on either if your batterys low (the blue light will flash) . is it the one with a bar mounted thing, on off, and 4 leds with % ratings?
I bloody worship my hotgrips, best kit ever. ____________________ Turbo R1
CRF450R |
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wikiwiki |
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wikiwiki Scooby Slapper
Joined: 17 Jan 2007 Karma :
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MarkJ |
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MarkJ World Chat Champion
Joined: 11 Apr 2006 Karma :
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Posted: 20:08 - 23 Mar 2008 Post subject: |
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I tried it, let them switch themselves off when the battery ran "low". I then started the bike with headlights on with no problems . If it ever managed to completely drain the battery you can always bump start anyway |
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kawakid |
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kawakid World Chat Champion
Joined: 15 Mar 2005 Karma :
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Posted: 13:38 - 24 Mar 2008 Post subject: |
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You should use a relay!!!!!!!!!!!!!!!!!!!!!!!!!
Then power to the grips only becomes available, when the ignition is on.
Thus the battery won't ever drain and you don't have to worry
about leaving them.
Here are some instructions I wrote a while back.
It not too hard. All together it'll cost less than £10
https://www.bikechatforums.com/download.php?id=53243 ____________________ I've a twin and a 4. |
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neatbik |
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neatbik World Chat Champion
Joined: 27 Jun 2007 Karma :
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Posted: 17:32 - 24 Mar 2008 Post subject: |
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Ive wired mine straight to the battery, and never had any problems. I did accidently leave them on once but they turned themselves off and saved the battery |
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Charlie |
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Charlie World Chat Champion
Joined: 27 May 2007 Karma :
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Posted: 18:05 - 24 Mar 2008 Post subject: |
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kawakid wrote: | You should use a relay!!!!!!!!!!!!!!!!!!!!!!!!!
Then power to the grips only becomes available, when the ignition is on.
Thus the battery won't ever drain and you don't have to worry
about leaving them.
Here are some instructions I wrote a while back.
It not too hard. All together it'll cost less than £10
https://www.bikechatforums.com/download.php?id=53243 |
No you shouldn't. The new style are designed to run straight from the battery. Running off a relay confuses the system as it is not set-up for what ever voltage it is getting fed from the relay.
The old style with the twisty knob, then yes it would be a good idea to use a relay.
The new ones work by (I guess) a non-inverting Schmitt trigger, this is a simple electronic device which turns off when the power drops below a set threshold. It is isn't a new technology and I am really surprised it wasn't use in the first hotgrips.
Also I have read reports about the old style ones setting on fire, that would not be good. All you need is a cpu bit, not the actually grips. My dad got one of them from Hein Gericke and fitted them to his old grips. ____________________ Past: Honda x8rs, Honda City fly, Honda Hornet 250, Honda VFR750, Yamaha xt600e.
Current: Honda CBR929RR & Yamaha XT660Z Tenere |
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kawakid |
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kawakid World Chat Champion
Joined: 15 Mar 2005 Karma :
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andi |
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andi Crazy Courier
Joined: 23 Sep 2007 Karma :
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Charlie |
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Charlie World Chat Champion
Joined: 27 May 2007 Karma :
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Posted: 20:27 - 24 Mar 2008 Post subject: |
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Because you can get different levels of voltage, current and resistance thanks to the components on the system. The electronic system which controls which controls the grips isn't designed to work with an altered signal.
The person who created this post has just proved that using a relay doesn't always provide enough power for the system on the heated grips not to trip.
My Dad's bike came fitted with heated grips done via a relay, and at tick over with the breaks on the heated grips turn off.
You'd think that Schmitt triggers would be reliable, they where invented in the 1930's and are used in all sorts. If don't trust that bit of electronics I don't know how you can use the heated grips without fear of them blowing up
Its up to you mate, but it saves an hours fitting a relay.
Blah I am tired and don't know why I'm arguing over a simple heated grip things. Oxford technicians recommend straight to the battery and thats good enough for me. ____________________ Past: Honda x8rs, Honda City fly, Honda Hornet 250, Honda VFR750, Yamaha xt600e.
Current: Honda CBR929RR & Yamaha XT660Z Tenere |
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Charlie |
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Charlie World Chat Champion
Joined: 27 May 2007 Karma :
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teabag |
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teabag Renault 5 Driver
Joined: 18 Mar 2007 Karma :
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Stelmer |
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Stelmer World Chat Champion
Joined: 31 Dec 2006 Karma :
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Posted: 12:22 - 26 Mar 2008 Post subject: |
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I had the same problem but mine are wired direct to the battery and earthed nearby.
Turned out there was a fault with the fuse caused by me taking it out every night.... |
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Feasty |
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Feasty World Chat Champion
Joined: 01 Nov 2006 Karma :
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Posted: 12:49 - 26 Mar 2008 Post subject: |
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I've got mine wired direct to the battery - as per the hotgrip instructions!
Never had any trouble and they do turn off automatically when left off without the engine running. But also leave enough power in the battery to start the bike again...
On another note, when I'm idling and with the hotgrips on I notice it makes the lights pulse ever so slightly - as expected really but just looked funny! ____________________ Previous: Aprilia Habana Retro 50cc (beauty), Yamaha SR125 (fell apart), Honda XR125 (nippy little commuter), Honda SLR650 (Geewhizz), Yamaha Diversion 900S (Smoooooth) written off courtesy of a stupid escaped horse.
(7 year gap), BMW F650 (Relaxing ride). Aprilia Caponord ETV1000 (Big and bold). Yamaha FZS600 (got me in trouble too quick!).
Current: Yamaha TDM 900 (Comfy, light but big, power when needed). |
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bigwill |
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bigwill Trackday Trickster
Joined: 06 Aug 2006 Karma :
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Old Thread Alert!
The last post was made 16 years, 85 days ago. Instead of replying here, would creating a new thread be more useful? |
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