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Fitting PIAA Driving Lights to the V100

John in PA

Cruisin' Guzzisti
GT Contributor
Joined
Jul 31, 2009
Messages
255
Location
Hollidaysburg, PA

PIAA 02772 LP270 2.75" LED Driving Light Kit (complete with wiring harness and relay) ($248 plus tax)​

These are SERIOUS driving lights.

PIAA 74000 7/8"-1.25" L-Bracket, (Twin Pack) ($87 plus tax)​

Included multiple bushings allow the bracket set to fit multiple size bars securely. Infinitely adjustable for mounting angle in 3 axes.

The trickiest business is routing wires away from moving bits and hot bits. With the aid of good lighting and a long flexible "grabber" it can be done. Body work removed included both side covers, loosened both "sub-sidecovers,", seats, battery cover. Removed fasteners at rear of bodywork, just enough to get a bit of extra lift to apply cable ties and route wiring. Main power connected directly to battery terminals per harness design. Finding a keyed 12V supply for the positive trigger wire required a bit of detective work. The OBD2 plug just under the seat is out as it is directly connected to ECU circuitry. The other plug stowed just under the seat is for the on board multimedia system. While it is switched power, a meter check proved it only supplies 5.5V, not near the 12V required to trip the relay for the lights. The OEM power plug for the factory fog lights is attached right under the left side cover. Alas, it supplies NO voltage, keyed or otherwise, unless the factory harness is attached.
A search of the shop manual and wiring diagram revealed that the fuse for the OEM fog light trigger circuit is right under the passenger seat, right side fuse block, 2nd fuse from the front, a 5A. I piggybacked the trigger wire off the load side of the fuse so that that part of the circuit would also be fused (the main supply has its own fuse in the +ve lead to the battery) The lighted on/off switch (red=OFF, green=ON) I located in a perfect location on the right dash panel, which also has plenty of room behind it to stow the connector and extra loops of trigger wire.

Abundant extra wire in the harness was also easily stowed in a well in front of the battery. Altogether, a rather neat and tidy install, after considerable head scratching...

I like loud horns and bright lights on a motorcycle. PIAA has now met both needs for my V100.

20230603 182854 20230603 182915 20230603 182936 20230603 183022 20230603 183033
 
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Well done! Clean job… you have a nicely tricked out V100S👍😁! Thx for the write up. Seems like a great alternative to the MG accessory lights. Nice and bright, I’ll bet!
 
Nicely done. One suggestion. Get the BMW nut caps from the old R100 bikes. I bet the nut is the same size as your PIAA light bolts. They only cost about $2.30 each side.

If you use a Dremel with a cutting wheel or a hacksaw, cut down the excess bolt and cover them with these caps with a dap of RTV silicone inside to make it stay in place, it will totally clean up the appearance and reduce the chance of snagging anything with those bolts sticking up like that.

BMW Part : 46 51 1 234 785
 
Nicely done. One suggestion. Get the BMW nut caps from the old R100 bikes. I bet the nut is the same size as your PIAA light bolts. They only cost about $2.30 each side.

If you use a Dremel with a cutting wheel or a hacksaw, cut down the excess bolt and cover them with these caps with a dap of RTV silicone inside to make it stay in place, it will totally clean up the appearance and reduce the chance of snagging anything with those bolts sticking up like that.

BMW Part : 46 51 1 234 785


Thanks, good observation. I'm leaving them alone till I have a chance to fine-tune the aim point of the lights after dark. Then, it would make a neater cleaner look for certain. I might even have a couple trim caps laying around the shop!

13mm trim caps
;)
 
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PIAA 02772 LP270 2.75" LED Driving Light Kit (complete with wiring harness and relay) ($248 plus tax)​

These are SERIOUS driving lights.

PIAA 74000 7/8"-1.25" L-Bracket, (Twin Pack) ($87 plus tax)​

Included multiple bushings allow the bracket set to fit multiple size bars securely. Infinitely adjustable for mounting angle in 3 axes.

The trickiest business is routing wires away from moving bits and hot bits. With the aid of good lighting and a long flexible "grabber" it can be done. Body work removed included both side covers, loosened both "sub-sidecovers,", seats, battery cover. Removed fasteners at rear of bodywork, just enough to get a bit of extra lift to apply cable ties and route wiring. Main power connected directly to battery terminals per harness design. Finding a keyed 12V supply for the positive trigger wire required a bit of detective work. The OBD2 plug just under the seat is out as it is directly connected to ECU circuitry. The other plug stowed just under the seat is for the on board multimedia system. While it is switched power, a meter check proved it only supplies 5.5V, not near the 12V required to trip the relay for the lights. The OEM power plug for the factory fog lights is attached right under the left side cover. Alas, it supplies NO voltage, keyed or otherwise, unless the factory harness is attached.
A search of the shop manual and wiring diagram revealed that the fuse for the OEM fog light trigger circuit is right under the passenger seat, right side fuse block, 2nd fuse from the front, a 5A. I piggybacked the trigger wire off the load side of the fuse so that that part of the circuit would also be fused (the main supply has its own fuse in the +ve lead to the battery) The lighted on/off switch (red=OFF, green=ON) I located in a perfect location on the right dash panel, which also has plenty of room behind it to stow the connector and extra loops of trigger wire.

Abundant extra wire in the harness was also easily stowed in a well in front of the battery. Altogether, a rather neat and tidy install, after considerable head scratching...

I like loud horns and bright lights on a motorcycle. PIAA has now met both needs for my V100.

View attachment 30211View attachment 30212View attachment 30213View attachment 30214View attachment 30215
Turn it on bro, and at night please!!
 
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