| Author | Message | ||
     Jst |
I'm working on a simplified wiring harness for a project of mine. I started with a '99 M2 harness. My question is on the relay that the side stand controls. One wire (gray, post 87)comes from the ignition module. The second wire (white /black stripe, post 86)goes to the coil and run switch. The third is (orange/orange stripe, post 30) this goes to keyed +12 and to the run switch. Finally there is a (tan/white stripe, post 85) that gets grounded when the side stand switch in closed (stand up) It appears to me from the wiring diagram that I could by pass this relay by connecting the white/black stripe to the coil directly to the tan/orange stripe. In my thinking this would eliminate the side stand switch. My questions are: 1. When the bike is running what signal or voltage is on the white/black stripe? 2. What does the gray gray wire from the ignition module do in the relay?  | ||
| 99x1 |
IMHO, the relay probably isn't wired the way you show it in the diagram. Google "Bosch Relay". The sidestand switch usually closes the ground side of the coil to pull it in. This relay also does the clutch and neutral interlock (through diodes). I don't think there is a connection between 87 and 86 inside the relay - 85 and 86 are the coil, 30 is the common which is connected to 87A when the coil isn't powered, and is connected to 87 when the coil is energized. | ||
| Jst |
That's the way the service manual has it laid out, with 87 going to 86. The manual also shows 85 going to the sidestand switch and clutch switch. Of course the drawing may be wrong. So which wire do I connect to 86 (coil wire) to delete the relay? | ||
| 99x1 |
" So which wire do I connect to 86 (coil wire) to delete the relay?" Remove the relay and connect 30 to 87 - this will then be the same as if the relay was energized. Terminal 30 is the +12 volts, and 87 provides this power to the ignition module. Just leave the other connections (85, 86, 87A) open. | ||
| Jst |
"Just leave the other connections (85, 86, 87A) open." But that doesn't give me a coil wire? BTW thanks for the help. | ||
| 99x1 |
"But that doesn't give me a coil wire? " I think the power is coming from the run switch? ("The second wire (white /black stripe, post 86)goes to the coil and run switch. ") The 86 terminal is connected to 30 terminal (on the relay socket, not inside the relay). Picture is from the S1 manual in the Knowledge Vault.  | ||
| Jst |
I think I get it now. The pink wire to the coil is the signal wire the white/black stripe is the 12V. I was thinking the white/black stripe was signal.  Clear as mud now. I should be able to run both the grey to the ignition module and the coil wire off of the same 12V fuse then.  |
