Ignition System Resistance - Manual Revision

86ford24 Article No. 86-2-19

IGNITION SYSTEM - RESISTANCE TESTS - SHOP MANUAL REVISION EMISSION DIAGNOSIS MANUAL

FORD 1982-86 ESCORT, EXP; 1983-86 LTD, THUNDERBIRD, CROWN VICTORIA, MUSTANG; 1984-86 TEMPO; 1986 TAURUS

LINCOLN-MERCURY 1982-83 LN7; 1982-86 LYNX; 1983-86 MARQUIS, COUGAR, MERCURY, CONTINENTAL, MARK VII, LINCOLN; 1984-86 TOPAZ; 1986 SABLE

LIGHT TRUCK 1983-86 EAND F-SERIES, BRONCO, RANGER; 1984-86 BRONCO II; 1986 AEROSTAR

If your voltmeter has a high impedance, it will not draw enough current to show a voltage drop when testing TFI power circuits for resistive connections. To assure an accurate test, attach a test light between the circuit being tested and ground as shown. The light will draw current through the connection and allow measurement of the voltage drop so a resistive connection can be identified.

IMPORTANT
Do not use a test light while monitoring the PIP or SPOUT signal. The test light draws more current than the signal circuit can supply. The test light should be used only on power circuits.

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"