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Old 08-06-2020, 01:44 PM   #1
infecto
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Hard wire lap timer to bike

Whats the best way to hard wire a device to a bikes electrical system. I definitely found options for devices that cost $100 but I feel like there must be an easier way. Any recommendations? If it helps the device is an aim solo 2. I dont care much if it power stays on while the bike is off. Of course if its possible to get it to shutoff power with similar effort and cost I am all for it.
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Old 08-06-2020, 01:48 PM   #2
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For a track bike with the stock wiring harness, the easiest spot for 12V keyed power is a headlight plug. Two spade connectors plugged into that and wired to your lap timer will work great. If you have a race harness, theres probably already 12V keyed power in a 'spare' plug somewhere near the gauges.
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Last edited by stangmx13; 08-06-2020 at 02:41 PM..
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Old 08-07-2020, 12:40 PM   #3
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Originally Posted by stangmx13 View Post
For a track bike with the stock wiring harness, the easiest spot for 12V keyed power is a headlight plug. Two spade connectors plugged into that and wired to your lap timer will work great. If you have a race harness, theres probably already 12V keyed power in a 'spare' plug somewhere near the gauges.
Works especially well for something as low a draw as a lap timer.
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Old 08-08-2020, 10:19 AM   #4
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Whatever you do, wire it up so that it's off when the bike is off. You WILL forget to turn the timer off some day and even though the timer doesn't draw much current, you will drain your battery.
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Old 08-11-2020, 10:07 AM   #5
infecto
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Ok good call on everyone. Thanks for the response, cannot believe I did not think about that. It is setup with a keyless race harness but I purchased it like this. I found a plug on the front end of the harness but honestly no clue on the type of plug. The spade idea was making sense but I was thinking it might be a normal 3 prong plug. This...I am not sure and is quite small.

Any ideas on this? Sorry for the shit picture but I figured it would work for identification, the front fairing is on and it was hard to get a good shot of it.
https://imgur.com/a/AHdzDgV
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Old 08-11-2020, 10:22 AM   #6
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Maybe you have H9 headlight bulbs. If so, you could buy this and connect it to your lap timer. Verify male or female of course.
https://www.amazon.com/Lighting-Wire.../dp/B00REU0JJQ
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Old 08-11-2020, 12:16 PM   #7
infecto
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Originally Posted by stangmx13 View Post
Maybe you have H9 headlight bulbs. If so, you could buy this and connect it to your lap timer. Verify male or female of course.
https://www.amazon.com/Lighting-Wire.../dp/B00REU0JJQ

yes it looks exactly like that. As always thanks a ton for your help. You helped me last time with how to mount the laptimer, got that sucker hooked up in the ignition hole.
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Old 08-11-2020, 12:49 PM   #8
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glad I can help
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Old 08-15-2020, 12:06 PM   #9
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Last question mostly because I don't want to fry anything.

Since the aim solo hardwire adapter is just a power cable and ground but the adapters to hook into the wiring harness are a postivie and negative I am guessing I can combine together the power for the solo with both the positive and negative cables. It makes sense to complete the circuit but I don't do this everyday.
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Old 08-15-2020, 02:23 PM   #10
infecto
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I dont do enough vehicle wiring. I guess a ground in vehicle terms is anything that returns to the negative pole on the battery so in this case I think I can just treat the solo cables as positive and negative. But please someone correct me if I am wrong.
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Old 08-15-2020, 03:07 PM   #11
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Positive is positive.

Negative is both negative and also known as ground.

So hook up the adapter's positive to bike's positive and adapter's negative to the bike's negative (ground).
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