BMW K bikes (Bricks)

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1Back to top Go down   radiator fan/starting problems Empty radiator fan/starting problems on Thu Jul 04, 2019 6:43 am

bigdavergs

bigdavergs
Silver member
Silver member
Hello all, fitted Oxford heated grips to my K100rs 16v last week, started the bike to test the grips were heating, all working good. Took it to work next day, no problem a couple of hours later went to start and ride home and when I turned on the ignition switch, the radiator fan came on and there were no priming noises from the fuel pump. The bike turned over fine and when pushing the starter button, the fan stopped running, when I stopped pushing the starter, the fan came back on. In the blurb supplied in the Oxford kit, it says something about the standard wiring possibly being affected by the heated grip wiring. Anyone else had this problem, or is it just coincidence and a sensor had failed. I've had the water temp sensor fail on this bike and it was replaced about a year ago, so not sure about that. Any suggestions? Thanks in advance, Dave.

    

2Back to top Go down   radiator fan/starting problems Empty Re: radiator fan/starting problems on Thu Jul 04, 2019 7:10 am

Dai

Dai
Life time member
Life time member
Does the bike behave itself if you disconnect the grips? Where are the grips connected to?


__________________________________________________
'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)
    

3Back to top Go down   radiator fan/starting problems Empty Re: radiator fan/starting problems on Thu Jul 04, 2019 11:46 am

duck

duck
Life time member
Life time member
What he said - what did you wire them up to?

All K bikes have a factory heated grip connector in the wiring harness under the left rear of the tank.  That's what I always use for aftermarket heated grips.

radiator fan/starting problems Hg.connector

radiator fan/starting problems Symtec9


__________________________________________________
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
    

4Back to top Go down   radiator fan/starting problems Empty Re: radiator fan/starting problems on Fri Jul 05, 2019 4:03 am

bigdavergs

bigdavergs
Silver member
Silver member
Hello Dai and Duck, yes, bike was running nicely prior and I followed the Oxford grips wiring diagram, the two grips each have wiring that are plugged into a connector that then goes down to the battery, where it splits, one wire going to +ve one to -ve. I did faintly remember some other discussion about plugging them into the BMW wiring, but didn't consider it. Thanks for the comments, Dave.

    

5Back to top Go down   radiator fan/starting problems Empty Re: radiator fan/starting problems on Fri Jul 05, 2019 7:23 am

Dai

Dai
Life time member
Life time member
Pull ther inline fuse and see if the bike behaves itself again. I suspect the answer is going to be 'no', in which case we look further... Very Happy


__________________________________________________
'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)
    

6Back to top Go down   radiator fan/starting problems Empty Re: radiator fan/starting problems on Sun Jul 07, 2019 12:59 am

bigdavergs

bigdavergs
Silver member
Silver member
Hi Dai, pulled the inline fuse for the heated grips, radiator fan still came on when turning the ignition key. Have found though that there is a remote switch for the fan hidden underneath the handlebars. The wiring for this goes down to the fan relay in the relay box. I'm going to pull this out and see what this does. Cheers again, Dave.

    

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