Cycleterminal has gotten a mention or two on here over the years. But I figured they, really *he* deserved another mention.
Joe, the owner/operator quickly and kindly put together a custom micro relay set up for me.
My track bike has a DIY race harness and a Bazazz fueling computer care of the previous owner. The directions for the Bazazz unit for my bike have one tap the tail light lead for switched 12v power. But the DIY race harness did away with that option
. So the PO had tapped a lead for the (removed) secondary air injection (SAI) system and all seemed well.
That is until I tried to add one of the Bazazz A/F loggers. That gizmo is a daughter and gets its power from the Bazazz fueling comp. I added it and things went a bit cray cray. The fueling comps readings from the bike were all off the mark, status leds were staying on when they should go off etc etc... Remove the A/F unit and the fuel computer was happy again...
Out comes the phone. Called bazazz Tech support and they had me send the the A/F module after I explained what I'd seen. Later a thought struck me and I called back. "What voltage should be going out to the A/F unit?"
"12 volts"
Out comes the multi-meter.... 8 volts. Battery is 12.8... wtf?
To shorten the story, the SAI lead that was supplying the power was only putting out 8 volts with the computer hooked up. Disconnect the computer it reads 12+ on the meter... So I can see why the PO made the mistake of thinking all was grand. It *seemed* like a source of 12v power and the fueling computer did work just fine - until I added something that was more sensitive about it's voltage.
So some more meter poking and I found a source of switched power that was an unused pin on the bikes "Alarm connector", and AMP 070 connector tucked under the seat.
So Joe of cycleterminal cooked up a custom harness for a 4 pin micro relay with the proper terminals to access the switched 12v via that AMP connector, the right style to feed the Bazazz computer and a couple ring terminals for the batter and main ground. It's about or perhaps more posh than the factory wiring.
tl;dr: Cycleterminal and Joe are cool and if you have a bike wiring project they have the supplies you need to do it right.
