Re: Resistor wire on 79 F150
I recall there being a resistor wire on the older vehicles with breaker
point ignition.... it was buried in the harness along the fire wall. IIRC,
it was identifiable by its fabric jacket. I don't recall such a wire on
DuraSpark 2 systems... if memory serves correct, the module contains a
current limiter for the coil - I've been mistaken before and this may be no
The fender mounted modules were the biggest concern with these systems. They
would die but could be brought back to life by pouring cold water on the
FWIW... open wires in a 12 volt system are rarely "self healing". Corroded
connections usualy get to the point where their current handling
capabilities wont allow the load to power up.
Rather than "think" you have a particular concern, you could use a test
light (in this case the test light is the most appropriate tool) to verify
power to the coil. A little testing takes away most of the guesswork and
allows us to perform a timely and, hopefully, economical repair.
<firstname.lastname@example.org> wrote in message
> Where's the Resistor wire on 79 F150 400 engine?
> I think I may have a open wire in it. Truck will run then suddenly
> die. Bypassing directly from coil to battery gets it running again.
> But where the heck is that resistor or "resistor wire" is how my
> repair info refers to it. OF course they cant explain where it is...