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Thread: Major elec problem, can anyone help?

  1. #16
    Registered User roger 04 rt's Avatar
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    Quote Originally Posted by 1911XD View Post
    Check the 2nd scematic down on this link, it is a great pdf. Both F1 & F7 link to the load relief relay. F7 was empty on my bike because that is the fuse for the factory grip heaters. I located the factory wiring harness for the grip heaters and utilized F7. No wires were shorted.

    http://www.bmwgsclub.nl/schematics/R...Schematics.pdf

    The horn and load relay are the same. I used the horn relay to test the load relay slot and everything worked as advertised.

    http://micapeak.com/bmw/gs/gs11fuse.htm
    The schematic on the link is a bit unclear but following it or the BMW drawings I have show that F1, F7 and the load relief relay have a common connection to the switch. However the common connection is on the battery side not the load side of the fuses so a bad load relief relay won't overload F1 or F7.

    This might be a bit clearer on this drawing: http://www.mac-pac.org/wp-content/up...ec_Diagram.pdf. Although it is for the 1100RT, the wiring is the same for those circuits.

  2. #17
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    Here is a link to a R1150RT ladder diagram of the electrical system which makes trouble shooting a lot easier.

    http://www.mac-pac.org/tech/electrical-diagrams/
    Ken S
    03 R1150RT

  3. #18
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    Quote Originally Posted by Roger 04 RT View Post
    The schematic on the link is a bit unclear but following it or the BMW drawings I have show that F1, F7 and the load relief relay have a common connection to the switch. However the common connection is on the battery side not the load side of the fuses so a bad load relief relay won't overload F1 or F7.
    I don't know what to tell you... But after replacing the relay everything works

    Honestly I didn't expect a relay to fix it but I had torn it down to the smallest bit- minus the bulk of the harness. Everything forward of the connectors under the tank was disassembled to include the grip controls down to the switches and I could find ZERO signs of a short or overheating.

    I used a mirror and flashlight and everything in the fuse panel looked good so I was at my whits end . So I tried the relay and I struck pay dirt.

    I rode it to work today and thoroughly enjoyed the grip warmers! It's a 70 mile round trip and she purrs like a kitten.

  4. #19
    Registered User roger 04 rt's Avatar
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    I'm probably missing something because electrical interactions can be complex. My reason for pressing you on this is just in case you get a problem again.

  5. #20
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    Quote Originally Posted by Roger 04 RT View Post
    I'm probably missing something because electrical interactions can be complex. My reason for pressing you on this is just in case you get a problem again.
    No problem, I have been trying to figure out why too. Why would adding the grip heaters blow a relay that was and is still in the same circuit?

    Was the relay just about ready to check out and the added current just finished it off? I have no idea, that's why I am an aircraft mechanic and not avionics

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