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Switched ignition wires
- Thread starter gbww
- Start date
Ronmar
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What are you trying to do? The switch controls relay K2 which in turn powers most of the 24V CB’s if you need switched 12V you are probably going to have to piggyback the coil of a 24V relay off of one of those switched 24V circuits and have it switch 12V from X2...
Ronmar
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You will have to add a relay. there are manufacturers that make aux fuse panels with a relay which would be a fairly straightforward install, except you will need a relay with a 24V coil... Something like this one I found on jegs website.
https://www.jegs.com/i/Painless-Performance-Products/764/70113/10002/-1
coachgeo
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if you want some things switched that ONLY come on after the "engine is running".... instead of the traditional "not powered on all the time" you could use what RonMar pointed out in post 4 above.... (though it may be 12v solenoid needed) and activate the solenoid off the oil pressure switch on the engine. This is also where the alternator gets its activation signal from so it is only putting forces on the engine "after" it is running and not fighting against the starter etc. while she is still trying to get fired up.
Ronmar
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Yep, you could control the wire off the alt field relay(would still need a 24V coil relay).
I believe the excitation delay is there to save the alternator and regulator. While the starter is cranking, the battery voltage is very low. An alternator trying to come online at low RPM with a system voltage turned into a black hole while the starter cranks, will max out the field winding current. Very hard on the alt/reg, far easier on components to bring it online a few seconds later when engine/alt are up to idle RPM and batteries are now lightly loaded...
I believe the excitation delay is there to save the alternator and regulator. While the starter is cranking, the battery voltage is very low. An alternator trying to come online at low RPM with a system voltage turned into a black hole while the starter cranks, will max out the field winding current. Very hard on the alt/reg, far easier on components to bring it online a few seconds later when engine/alt are up to idle RPM and batteries are now lightly loaded...