[Healeys] Distributor to spark plug lead continuity

[Gil Rockwell]

Hi Lin,

 

These are resistance wires to suppress ignition "noise" and that reading is
fine, around 800 ohms, based on the fact you're using the continuity scale.
Check the old one, it should be similar assuming the new connector pierced
the insulation and into the core.

The only wires that will register a low resistance reading are solid core,
copper conductor wires, which cause extreme static in the radio in the car
and the cars around you, which is why manufacturers switched to the
resistance or "suppression" wires.

 

Gil

 

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Linwood
Rose via Healeys
Sent: Thursday, May 21, 2020 10:56 AM
To: healeylist
Subject: [Healeys] Distributor to spark plug lead continuity

 

Hi guys,

Educate me. When doing some preventative maintenance, I pulled a spark plug
lead out of the radiator cap (using a 123 distributor) the cable pulled away
from the terminal - not a particularly unusual outcome. Got a new 90 degree
terminal and crimped it on to the cable (Pertronix cable) and before I put
the boot on the end of the cable I thought I would check the continuity. It
barely dropped below 1.

 

So then I checked a brand new, never used, cable made-up by AH Spares. As
shown in the image below when the sensors are attached to each end of the
cable I get a reading of .792 which is not sufficient to even sound the
beeper on the multimeter device. I suppose there are degrees of continuity
(not just on/off) but I guess I expected the alarm to sound and the reading
to drop to near zero.

 

Could someone interpret these findings for me?

 

Thanks, as always.

 

Lin

 





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