| Hi Grayhawk,
If you pull the wiring diagram for a Ford from the 60's with breaker points you will see how the solenoid was used as designed to short the ballast resistor during engine crank.
Good idea from Lancair to use the I terminal as a pump on indicator but they didn't change the original marking or function of the solenoid.
Hope the walk down memory lane pleases the nostalgia buffs.
Jack On Apr 20, 2013, at 6:00 AM, Lancair Mailing List wrote: Subject: Re: [LML] Relay snubber
Date: April 19, 2013 2:53:08 PM EDT
Uh, not quite Jack......... Yes, the intermittent relay failed (melted parts) because it was held in too long, but in the odd Lancair terminology environment: S = Switch (+12VDC, while the other side of the coil is grounded through the case) coming from the pressure switch and thence from the gear selection switch through the 5 A breaker/fuse that folks forget to pull when they pull the pump breaker whilst power is supplied from the main bus and the particular pressure is low enough to allow the pressure switch to make. I = Indicate = +12 VDC available as a tap off of the contactor plate when it makes the connection betwixt power and pump used to provide the positive voltage to the lamp on the console marked "pump in transition".
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