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this is all HS, electronics 1a.
but here goes.
shorting any signal?
there are many kinds of drivers in electronics.
pass passive, or active. ( are the 2 families.)
and there are drivers that hare pull up passive (resistor) (my Dizzy CMP)
active pullup to 5v or 12v via a transistor.
and then there are totum pole drivers. active UP and Active down.
Digital logic uses this for max speed.
active pullups and pull downs are common.
some are current limited, by passive or active means.
there are 2 fail paths a short to 12v and a short to ground.
a short to ground, many totem pole driver will overheat and blow out.
for example shorting the output of driven injector line can in fact blow it out.
The CMP (cas) can be any TYPE , any at all, we are talking here of cars made from 90 to 2010. (mostly) and they vary all over the map.
many drivers are output short protected. you need to find out the circuit type.
but in this case we are opening it.
There is no need at all to allow the line to ground out.
use quality wire, and some split sheathing. This can be done easy.
the signal is slow and low tech, and can be a long wire.
i hope this answers and opens , interest in real electronics. cheers.
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