No power from coil to distributor... (1 Viewer)

Joined
May 26, 2020
Messages
55
Location
sunset valley, tx
I haven’t been able to get a spark to my plugs, tested with an inline tester. Replaced coil and ballast resistor and still no spark.

Getting power to both sides of resistor and the wires off the coil but not from the plug to the distributor. Check both the cable and the actual outlet (?) of the coil. Nothing.

What am I missing?
Please correct any nomenclature I’m saying wrong.

Thank you in advance.

Ian
 
Joined
May 26, 2020
Messages
55
Location
sunset valley, tx
This is what was on there and what I replaced.
I believe it’s been in Texas since it’s birth or soon after...

877B1321-323E-4810-9B64-CEBEDC641893.jpeg


394E56B4-4EB1-4D34-8F8B-10971A031D7D.jpeg
 
Joined
Nov 25, 2014
Messages
486
Location
Western victoria Australia
When it's cranking, the resistor is bypassed. It has full 12v to the coil + via the circuitry of the truck.
It may be cutting the power to the resistor when cranking. A wire directly from bat+ to coil+ then crank it over will test this.
 
Joined
May 26, 2020
Messages
55
Location
sunset valley, tx
When it's cranking, the resistor is bypassed. It has full 12v to the coil + via the circuitry of the truck.
It may be cutting the power to the resistor when cranking. A wire directly from bat+ to coil+ then crank it over will test this.
Tried that, thank you. Still no spark via inline spark tester.
 

3_puppies

SILVER Star
Joined
Dec 2, 2002
Messages
14,645
Location
Helena MT
is this a new issue?
did this recently run?
any thing else done to it?
"the points tell the coil to fire"
need to check the points and condenser. points could be out of adjustment or burnt
 
Joined
May 26, 2020
Messages
55
Location
sunset valley, tx
gonna need to check the points and condenser. points could be out of adjustment or burnt
But to back up, why wouldn’t I get juice out of the coil? Points look clean haven’t attempted any adjustment though. Just working my way back and forth and noticed a power gap from the coil to the distributor.
 
Joined
May 26, 2020
Messages
55
Location
sunset valley, tx
@ Ian did it use to run? Did this just happen or is it a first time attempt to get it to run?
I imagine at some point it ran. It hasn’t since I got it, but it was all but free so...
I’ve got it to turn over, replaced the plugs, oil, battery etc...

CDD21146-1C98-4597-B46D-2D5887BC65CA.jpeg
 
Joined
Nov 25, 2014
Messages
486
Location
Western victoria Australia
I would visually look at a sparkplug connected to the dizzy and crank it over[ with the wire from bat+ to coil +] and look for spark.
Pretty hard for a points system to malfunction, they are so simple. Unless there's a short or broken wire from the points to the dizzy negative.
Juice out of the coil is not constant, its pulses of very high voltage . You probably know this but just in case.
Congrats on the freebie!! looks pretty good.
 
Last edited:
Joined
May 26, 2020
Messages
55
Location
sunset valley, tx
I would visually look at a sparkplug connected to the dizzy and crank it over[ with the wire from bat+ to coil +] and look for spark.
Pretty hard for a points system to malfunction, they are so simple. Unless there's a short or broken wire from the points to the dizzy negative.
I’ll try that, but maybe I’m missing something, if there isn’t power from the coil to the dizzy how would I get spark?
I am an elementary at best mechanic. Closer to kindergarten.
 

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