To test the insulated circuit for high resistance, disable the ignition or bypass the ignition switch with a remote starter switch. Connect the positive lead of the volt meter to the battery's positive terminal post or nut. By connecting the lead to the cable, the point of high resistance(cable-to-post connection) may be bypassed. Connect the negative lead of the voltmeter to the starter terminal at the solenoid or relay. Crank the engine and record the voltmeter reading. If the reading is within specifications(usually 0.2 to 0.6 voltage drop), the insulated circuit does not have excessive resistance. Proceed to the ground circuit resistance test outlined in the next section. If the reading indicates a voltage loss above specifications, move the negative lead of the tester progressively closer to the battery, cranking the engine at each test point. Normally, a voltage drop of 0.1 volt is the maximum allowed across a length of cable. Photo Sequence 13 goes through the correct procedure for conducting a voltage drop test on a typical starter circuit.
Test conclusions When excessive voltage drop is o served, the trouble is located between that point and the preceding point tested. It is either a damaged cable or poor connection, an undersized wire, or possibly a bad