Operating instructions

rdge Jl
Test Number 24--Ignition Cables
Refer to Test Number 9--OhmsTest (sections 1-7) for Ohmmeter use.
IGNITION CABLE TEST
Standard ignition cable is NOT solid wire. It is a graphite impregnated
fibre conductor with a built-in resistance of 1000 to 50,000 ohms,
depending upon the length of the cable and the type of _ngine. This
resistance is necessary to suppress spark interference with radio,
television, and other communication reception. It also contributes to
longer distributor cap and spark plug electrode life. If the resistance
value of the cable is significantly increased by stretching or breaking the
internal graphite impregnated conductor, the engine will misfire and its
overall performance will deteriorate.
I. Remove the cables from the engine. When removing the wire from the
spark plug, grasp the spark plug boot and twist and pull wire
with a firm, steady force. DO NOT yank on the cable to remove it.
2. Use the X 1000 position on the RANGE SELECTOR of the Craftsman
Analyzer.
3. Connect the RED and BLACK Ohn=netertest leads to the ends of the cable
as shown below, and use an adaptor spring at the SPARK PLUG END of the
cable as shown.(Figure 44_
4. Gently flex the ignition cable while testing, if the OHMMETER reading
wanders excessively or rises to infinity (,o) thelcable is defective
and should be replaced.
5. Consult your vehicle service manual for the proper resistance range
per inch or foot of cable. Replace those wires which are out of
tolerance.
ADAPTER SPRING,
DISTRIBUTOR END
BLACK
SPARK PLUG END
IGNITION CABLE
TEST CONNECTIONS
'RED
FIGURE 44