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1Back to top Go down   91 k100rs power to the fuel pump Empty 91 k100rs power to the fuel pump Thu Feb 21, 2013 5:31 pm

2slow

2slow
active member
active member
I'm getting no power to the fuel pump on a 91 k100rs when i turn the key on the pump does not run also there is no power to the plug where the gas tank plugs into the wiring harness new battery and great spark at the spark plugs and the fuses look good is there a fuel pump relay that may be bad any ideas thanks

    

2Back to top Go down   91 k100rs power to the fuel pump Empty Re: 91 k100rs power to the fuel pump Thu Feb 21, 2013 7:21 pm

twincarb

twincarb
Life time member
Life time member
Head back to the portal and you will find the link to the Interactive Wiring Diagrams from there you will see the one highlighting the Fuel Pump.

They are your best starting point. When checking fuses it's best to not just eye ball them but "prove" they work either using a multimeter or swap it for a known good one of the same rating.

You should be able to trace it to the following items:

Fuse 6
Fuel Pump Relay
....


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BMW K100LT 1988 Matt Black Peugeot Electra Blue (ELX) Colour is now confirmed...
Yamaha Thundercat
Triumph Spitfire (not a bike but hell it's British chaps)
91 k100rs power to the fuel pump 169042 91 k100rs power to the fuel pump 169034
    

3Back to top Go down   91 k100rs power to the fuel pump Empty Re: 91 k100rs power to the fuel pump Fri Feb 22, 2013 3:17 am

Inge K.

Inge K.
VIP
VIP
The fuel pump relay circuit is wired a bit different on a Motronic equipped model.
I would guess that the reason to the problem is a malfunctioning sidestand switch.

Have a look at this thread.


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Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

4Back to top Go down   91 k100rs power to the fuel pump Empty Re: 91 k100rs power to the fuel pump Fri Feb 22, 2013 4:10 am

2slow

2slow
active member
active member
Inge I think you may be right my son had to move the bike today to get his bike out and after he moved it and put it back I tried it again and fuel pump came on and fired right off I'll have to get it on the lift and see whats going on down there Thanks for all the tips

    

5Back to top Go down   91 k100rs power to the fuel pump Empty Re: 91 k100rs power to the fuel pump Fri Feb 22, 2013 11:52 pm

krambo

krambo
Life time member
Life time member
I reckon Inge is bang on the money here - my K1100 suffers regularly from the side-stand cut out switch issue, especially after riding when roads are wet. I regularly douse it with GT85 spray (WD40 would do the same job) Wink


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1984 BMW K100RT, 1993 BMW K1100LTIC,1982 Kawasaki KZ1100 Spectre
"Aut viam inveniam aut faciam." 91 k100rs power to the fuel pump Uk-bmw12
http://www.its-personal.net
    

6Back to top Go down   91 k100rs power to the fuel pump Empty Re: 91 k100rs power to the fuel pump Tue Feb 26, 2013 6:17 am

Rabidchiwawa007

Rabidchiwawa007
Platinum member
Platinum member
I had the same issue a little while back. It turned out to be the sidestand switch. So I took it out and spliced the wires together so I'd never have that problem again. The switch was a little bent though too. This just means I have to make sure the sidestand's up before I go anywhere. I always use the center stand anyways Razz


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1968 BSA Lightning
1991 BMW K100RS 16v with K1100LT fairing
    

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