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1Back to top Go down   Flashing red warning light Empty Flashing red warning light on Thu Jul 04, 2019 2:13 pm

edmundf

edmundf
Silver member
Silver member
Hi to all the electrical experts.

I am going to take le K down country for the weekend. There is a flashing red warning light. As far as I understand it is the bulb monitoring unit. Both switches work, contacts are clean and the bulb works and is brand new.

When I turn on the ignition the light comes on not flashing and then when I activate the front and back brakes it starts to flash. Not a serious issue as everything seems to be working except for the annoying red warning light

Any thoughts on how to troubleshoot this?

Cheers


__________________________________________________

K569 - K 75

    

2Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Thu Jul 04, 2019 4:34 pm

Laitch

Laitch
Life time member
Life time member
@edmundf wrote: Both switches work, contacts are clean and the bulb works and is brand new.
You write the bulb works but on my US K75, the bulb monitor is checking two bulbs—the brake lamp and the tail lamp.

You had rewired your moto after a fire. You seemed to make good progress until this.

When my moto's ignition switch is turned to On, the red triangle stays lit until both the front brake lever and the rear brake pedal have been depressed to activate the brake lamp. If the brake lamp and brake switches are ok, the triangle light will be extinguished. If the tail lamp isn't operating, the light will stay on.

You were riding back in April. Was there a warning light shutoff sequence to deploy back then, or nothing?


__________________________________________________
1995 K75T 73,000 miles
Flashing red warning light Usa-lo10
    

3Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Thu Jul 04, 2019 4:53 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Can you refresh us as to the year and model you have?  Laitch mentions that you have rewired it.  Do you have ABS?  An ABS fault will make the light flash.


__________________________________________________
Present:
1994 K75RT
1991 K100RS

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

4Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Thu Jul 04, 2019 5:14 pm

edmundf

edmundf
Silver member
Silver member
it is a 1992 VIN ends 0251548 - at the moment i have the ABS relay removed to stop that light from flashing (i know)

I have been riding the bike most weekends with the intention of stripping the bike over the winter months to get it resprayed - it just seems to be a weird fault.

I have checked it a few times - once the light did go out and stay out but now it seems to go through the check that you describe (on solid until front and back brake are pressed then go out) but instead of going out it simply flashes?

currently on the to-do list
 - reconnect ABS
 - reconnect heated grips
 - reconnect hazard lights
 - front seals (will get this done professionally)
 - new screen
 - get tank welded
 - refurb speedo lights


oh and actually riding it Smile

    

5Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Thu Jul 04, 2019 8:03 pm

Laitch

Laitch
Life time member
Life time member
@edmundf wrote:it is a 1992 VIN ends 0251548
Go to the Profile tab, click the Signature tab then put the model and its date of manufacture in your signature. It will then show up along with every post you make as a reference. You might notice many of us have done that.


__________________________________________________
1995 K75T 73,000 miles
Flashing red warning light Usa-lo10
    

6Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Fri Jul 05, 2019 1:30 pm

duck

duck
Life time member
Life time member
There are TWO ABS relays. Both are blue.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

7Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Sat Jul 06, 2019 7:24 am

Stumpy

Stumpy
Silver member
Silver member
I would check the condition of the relays, they are expendable and the most likely part to fail.

    

8Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Sat Jul 06, 2019 4:13 pm

Dai

Dai
Life time member
Life time member
If it does turn out to be an ABS relay, I can send one or two down with Ringfad. Not that he knows, just yet!


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

9Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Sat Jul 06, 2019 4:41 pm

Ringfad

Ringfad
Life time member
Life time member
@Dai wrote:If it does turn out to be an ABS relay, I can send one or two down with Ringfad. Not that he knows, just yet!


He knows now Very Happy . Happy to bring them down from Down. Probably next weekend I will be going past you. 

GPS all packed and ready.


__________________________________________________
Flashing red warning light Ir-log10

   ;BMW; K100RS Style Black 1987 105K Km     ;BMW; K1 Black 1993 51K Km     ;BMW; K1100RS Red 1993 70k miles  ;BMW; K100 16V Black (ex ElectricMonk)
    

10Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Sat Jul 06, 2019 9:04 pm

Dai

Dai
Life time member
Life time member
Well... buggerrit. I'm in Kilkenny next weekend; just to show my age, I'm going to see Bob Dylan and Neil Young. If it's not too much trouble Simon, could you leave it in the woodstore behind the bag of coal? If Ed does diagnose his problem as being a relay before next Saturday, I'll leave a couple of relays on top of said bag of coal.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

11Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Sun Jul 07, 2019 6:26 am

Born Again Eccentric

Born Again Eccentric
Life time member
Life time member
@edmundf wrote:it is a 1992 VIN ends 0251548 - at the moment i have the ABS relay removed to stop that light from flashing (i know)

I have been riding the bike most weekends with the intention of stripping the bike over the winter months to get it resprayed - it just seems to be a weird fault.

I have checked it a few times - once the light did go out and stay out but now it seems to go through the check that you describe (on solid until front and back brake are pressed then go out) but instead of going out it simply flashes?

currently on the to-do list
 - reconnect ABS
 - reconnect heated grips
 - reconnect hazard lights
 - front seals (will get this done professionally)
 - new screen
 - get tank welded
 - refurb speedo lights


oh and actually riding it Smile
Lots of talk about faulty ABS relay...but have you actually checked and reset the ABS brain? 

The solid light that flashes once both brake levers are operated shows that it is not the BMU or bulbs and the fault lies with the ABS. Normally, the light will flash until you ride off and exceed 2.5mph at which point the ABS brain checks that the input from the front and back wheels are the same (i.e. both wheels turning at same speed) and then activates itself...and the light goes out. However, if you have a fault code in the ABS brain, then it doesn't activate and the light keeps flashing (you can stop the flashing by pressing the ABS switch on the dash pad which gives a solid light for the next 10  minutes and then starts flashing again). This is not a huge problem, you still have both brakes operational but you don't have the benefit of ABS.

There are several reasons for the fault code and you need to connect an ABS tester to the blue socket on the right hand side frame (above the coolant expansion bottle). That will tell you what the fault is. You then need to fix the fault and reset the brain. One of the faults is the ABS relay, so changing the relay and reseting the brain may cure your problem...but there are other faults too (low voltage, sensor error etc.) and you often have to do several resets to clear all the faults that have been stored.


__________________________________________________
Flashing red warning light Uk-log10 Flashing red warning light Sco-lo15Flashing red warning light Eu-log10
                              Paul  Flashing red warning light 905546712

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurance write-off rebuild Feb 17
"Donor" K100LT 1990 (Red)  (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike).   June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

12Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Sun Jul 07, 2019 10:19 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
@Born Again Eccentric wrote:
@edmundf wrote:it is a 1992 VIN ends 0251548 - at the moment i have the ABS relay removed to stop that light from flashing (i know)

I have been riding the bike most weekends with the intention of stripping the bike over the winter months to get it resprayed - it just seems to be a weird fault.

I have checked it a few times - once the light did go out and stay out but now it seems to go through the check that you describe (on solid until front and back brake are pressed then go out) but instead of going out it simply flashes?

currently on the to-do list
 - reconnect ABS
 - reconnect heated grips
 - reconnect hazard lights
 - front seals (will get this done professionally)
 - new screen
 - get tank welded
 - refurb speedo lights


oh and actually riding it Smile
Lots of talk about faulty ABS relay...but have you actually checked and reset the ABS brain? 

The solid light that flashes once both brake levers are operated shows that it is not the BMU or bulbs and the fault lies with the ABS. Normally, the light will flash until you ride off and exceed 2.5mph at which point the ABS brain checks that the input from the front and back wheels are the same (i.e. both wheels turning at same speed) and then activates itself...and the light goes out. However, if you have a fault code in the ABS brain, then it doesn't activate and the light keeps flashing (you can stop the flashing by pressing the ABS switch on the dash pad which gives a solid light for the next 10  minutes and then starts flashing again). This is not a huge problem, you still have both brakes operational but you don't have the benefit of ABS.

There are several reasons for the fault code and you need to connect an ABS tester to the blue socket on the right hand side frame (above the coolant expansion bottle). That will tell you what the fault is. You then need to fix the fault and reset the brain. One of the faults is the ABS relay, so changing the relay and reseting the brain may cure your problem...but there are other faults too (low voltage, sensor error etc.) and you often have to do several resets to clear all the faults that have been stored.
+1  This is excellent advice.  I just reread the thread and noticed that as soon as it was mentioned that the bike in question was a 1992 with ABS everyone started talking about relays but not doing an ABS fault readout and reset. 

I know from personal experience that a weak battery can trigger an easily reset ABS fault once the battery has been recharged.


__________________________________________________
Present:
1994 K75RT
1991 K100RS

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

13Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Sun Jul 07, 2019 3:17 pm

volador

volador
Silver member
Silver member
@Dai wrote:Well... buggerrit., I'm going to see Bob Dylan and Neil Young.
WOW Shocked those guys are still touring? Is that an AARP sponsored event?  Flashing red warning light 44271

ABS Reset

https://www.youtube.com/watch?v=rsrrpbb4kJc


__________________________________________________
1984 K100RS  1991 K100RS
    

14Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Sun Jul 07, 2019 6:11 pm

Dai

Dai
Life time member
Life time member
@volador wrote:
@Dai wrote:Well... buggerrit., I'm going to see Bob Dylan and Neil Young.
WOW Shocked those guys are still touring? Is that an AARP sponsored event?  Flashing red warning light 44271
Probably... Very Happy Saw Roger Waters, John Fogerty and Steve Millar recently too. All in the same age bracket, although you wouldn't know it the way John Fogerty hit the stage and never stopped for a good two hours. Got tickets for Rick Wakeman in December too.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

15Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Mon Jul 08, 2019 8:51 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
Admin can we move some of these posts over to the SAGA section...... mech


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 96,650 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox Its a Bat outta Hell
    

16Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Mon Jul 08, 2019 1:45 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
You know you're getting old when you go to see your musical heroes at a casino or county fair.  Another sign is that their contract rider specifies that a cardiac specialist and a defibrillator be onstage through the sound check and the full concert.  An ambulance parked near by is often required as well.


__________________________________________________
Present:
1994 K75RT
1991 K100RS

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

17Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Wed Jul 10, 2019 5:20 am

edmundf

edmundf
Silver member
Silver member
Apologies - I posted this then went away for the weekend, followed by a few days off with a pulled back :/

i was reading through all the suggestions and i think i am slightly more confused than before?

The red warning light i am getting is the one in the center of the cluster, not the ABS warning light. 

Does the ABS have to be working for the BMU to function?. The ABS is a battle for another day.

    

18Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Wed Jul 10, 2019 6:28 am

duck

duck
Life time member
Life time member
Once you hit both brakes to get rid of the solid BMU light it will then flash with the ABS warning light until the ABS successfully initializes.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

19Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Wed Jul 10, 2019 7:18 am

edmundf

edmundf
Silver member
Silver member
Hmmm i wonder is it as simple as the plug is not connected correctly on the ABS brain. i did disconnect it to get at the bulbs to check them (my ABS unit is in the tail) - investigations to contiune


__________________________________________________

K569 - K 75

    

20Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Wed Jul 10, 2019 7:51 am

duck

duck
Life time member
Life time member


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

21Back to top Go down   Flashing red warning light Empty Re: Flashing red warning light on Wed Jul 10, 2019 8:02 am

edmundf

edmundf
Silver member
Silver member

Thanks for the link!


__________________________________________________

K569 - K 75

    

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