I'm with you there!... but then again I wasn't suggesting taking that draw through the EHC but rather pwr for switched relay...
The only potential problem I see is that carpetman is looking for a power supply that switches "ON" when the bike is running then "OFF" when it's not. If he were to wire a power relay to horn control (A29) he'd only have power while he was holding the button and as far as using the same "switched" wire as EFI bikes, the EHC's are different and I don't think there's a wire at pin A20 on the carbureted version for him to use.I wouldn't be scared to use either the horn or air ride ckt through the EHC to control relays/solenoid..
For a 20A draw he'll have to get it directly from the battery (with a FUSE) but the coil of the relay wouldn't draw much...20amp solenoids... Why not use relays to trip closed to pwr directly from battery?
The only serious current draw we are talking about as far as I can tell is from his fuel pump. If that were wired to a switched relay (wired to switched/trigger input) and wired to battery for draw load; it could have been done imo using Air Ride ckt [keep in mind I was not aware he was using full throttle micro switch either]. I would think he could purge with either horn or HI/Low once switched to Air Ride mode.I'm with you there!
The only potential problem I see is that carpetman is looking for a power supply that switches "ON" when the bike is running then "OFF" when it's not. If he were to wire a power relay to horn control (A29) he'd only have power while he was holding the button and as far as using the same "switched" wire as EFI bikes, the EHC's are different and I don't think there's a wire at pin A20 on the carbureted version for him to use.
Dennis



Holy shit man!Right, as you can see my ideas lean toward doing away with add-on switches, if possible, for a clean stealth or trick install sort of thing. But again, I haven't proven this approach personally in this application. It just seems to me (still) that, in theory, you could have something like:
Bike is running - Gauge lights are on with parallel tap off bikes running lights.
Hit the Start Button - This activates AirRide Ckt Control mode of operation.
Toggle Hi Beam - To Arm NOS (Fuel pump on, drawing current from battery)
Toggle Hi Beam (again) - Disarm NOS, shut fuel pump off.
Toggle Low Beam - Purge NOS
Hit Start Button (again) - Returns Hi/Lo beam function. (NOS still activated)
WOT - NOS solenoid. - Throttle micro-switch
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Other school of thought is for it to be seen; ie. Big-O Red honking NOS switch that looks cool...Even with that, you could still purge from Hi/Low if you wanted to imho.
Anyway, just something to think about. Others have built momentary switch latching relays for similar functions; usually to control lighting, accessory or audio applications.
I'd be interested in seeing your gauge / switch panel mount etc to get an idea of what you are thinking. Cool stuff either way, keep us posted.
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I believe pin 13 on the "ECU" is switched power on the EFI bikes. He could get it from here.I'm with you there!
The only potential problem I see is that carpetman is looking for a power supply that switches "ON" when the bike is running then "OFF" when it's not. If he were to wire a power relay to horn control (A29) he'd only have power while he was holding the button and as far as using the same "switched" wire as EFI bikes, the EHC's are different and I don't think there's a wire at pin A20 on the carbureted version for him to use.
Dennis
So I'm clear you mean pin 13 on the EFI controller? If so, the problem is that his bike is carbureted so no EFI controller...I believe pin 13 on the "ECU" is switched power on the EFI bikes. He could get it from here.
Neil
Is the availability of an EFI EHC any better or cheaper than it is for non-EFI bikes?A EFI, EHC will work in a Carb bike as well.
No pin 13 coming off the ECM is switched power.So I'm clear you mean pin 13 on the EFI controller? If so, the problem is that his bike is carbureted so no EFI controller...
Dennis
I do not know the answer to your question.....Is the availability of an EFI EHC any better or cheaper than it is for non-EFI bikes?
Dennis
Guess I'm not following you. Looking at my schematic I'm seeing that B-13 isn't used on either type of EHC (at least in the harness connector) and A-13 is used on both for the right rear tail light. While that would be switched power I wouldn't add any kind of load to the light circuit including the coil of a relay. But, that's just me...No pin 13 coming off the ECM is switched power.
I make a PDF tomorrow of the pin out of the ECM. In fact I post up the pin out how my bike was done between the Thundermax wide band ECM I installed and to the Thunderheart micro controller as well as the push button converter.
Neil
Sorry for the confusion,Guess I'm not following you. Looking at my schematic I'm seeing that B-13 isn't used on either type of EHC (at least in the harness connector) and A-13 is used on both for the right rear tail light. While that would be switched power I wouldn't add any kind of load to the light circuit including the coil of a relay. But, that's just me...
Looking forward to your PDF to clear things up for me! :up:
Thanks,
Dennis
I wondered if we weren't talking about two different things.Sorry for the confusion,
I am still looking at a EFI bike with a ECM.........seeing how that is what I am use too......
Not a carb bike...which does not have it....
No fault, just a communication glitch! :roll:My fault all the way....

