Major elec problem, can anyone help?

[Roger 04 RT]

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.

[Nosvamos]

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/

[1911XD]

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.

[Roger 04 RT]

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.

[1911XD]

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