5-4
Chapter 5 Engine electrical systems
7.4a To check the coil primary resistance on an earlier type coil,
touch the leads of an ohmmeter to the positive and negative
primary terminals (arrows) and compare your reading with the
coil primary resistance listed in this Chapter’s Specifications
3 Clean the coil primary terminals and check the coil tower terminal for
corrosion. Clean it with a wire brush if any corrosion is found.
4 Check the coil primary resistance by attaching the leads of an ohm-
meter to the positive and negative primary terminals
(see illustrations).
Compare your readings to the primary resistance listed in this Chapter’s
Specifications.
5 Checkthe wilsecondaryresistance by hooking one of theohmmeter
leads to one of the primary terminals and the other ohmmeter lead to the
lanje center terniinl(see
illustrations).
Compare your readings to the
secondary resistance listed in this Chapter’s Specifications.
6 If the measured resistances are not as specified, the coil is probably
defective and should be replaced with a new one.
7 For properT@fion system operation, all coil terminals and wire leads
must be kGpt clean and dry.
8 Install the coil in the vehicle and hook up the wires.
Ballast resistor
9 Some earlier models use a ballast resistor
(see illustration 7.2) to
protect the coil from excessive voltage during low-speed operation.
1 b To check the ballast resistor, detach it from the coil or firewall, unplug
the leads, touch the probes of an ohmmeter to the terminals of the resistor
andcorii@Gj%WE%idings to the resistance listed in this Chapter’s Speci-
fications. If the resistance is not as specified, replace the resistor.
7.5a To check the coil secondary resistance on an earlier type
coil, touch one lead of the ohmmeter to one of the primary
terminals and the other lead to the high-tension terminal (arrows),
then compare your reading to the coil secondary resistance listed
in this Chapter’s Specifications
2.4L Engine
3.OL Engine
High- \oJ
,voltage
terminal
High.
voitage
terminal
7.4b To check the coil primary resistance on a later type coil,
touch the leads of an ohmmeter to the positive and negative
primary terminals and compare your reading with the coil primary
resistance listed in this Chapter’s Specifications
8 Distributor - removal and installation
Removal
Refer to illustrations 8.6a and 8.6b
1 Detach the cable from the negative battery terminal.
2 Unplug the coil high-voltage lead from the distributor cap.
3 Detach the vacuum hose(s) from the advance unit (if equipped). -~
4 Look for a raised “1 “on the distributor cap. This marks thk location for
the number one cylinder sparkplug wire terminal. If the capdoes not have
a mark for the numberbne terminal, locate the number one spark plug and
trace the wire back to the terminal on the cap.
5 Remove the distributor cap (see Chapter 1) and turn the engine ovei
until the rotor is pointing toward the number one spark plug terminal (see
the locating TDC procedure in Chapter 2).
6 Make a mark on the edge of the distributor base directly below the ro-
tor tip
and in line with it (see
illustration).
Also, mark the distributor base
and the engine block to ensure that the distributor is installed correctly
(see illustration).
7 Remove the distributor hold-down nut and washer, then pull the dis-
tributor straight out to remove it.
Caution: DO NOT turn the crankshafts
7.5b Checking the coil secondary resistance on a later-type coil
(2.OL engine shown)
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