Short circuit check (wire harness to ground)

1. 1
   Disconnect the negative (–) cable from the battery.
2. 2
   Disconnect the connectors/couplers at both ends of the circuit to be checked.

if the circuit to be checked branches to other parts as shown, disconnect all connectors/ couplers of those parts. Otherwise, diagnosis will be wrong.

3. Measure resistance between terminal at one end of circuit (“a” terminal in figure) and body ground. If continuity is indicated, there is a short circuit to ground between terminals “a” and “c”.

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4. Disconnect the connector/coupler included in circuit (coupler “b”) and measure resistance between terminal “a” and body ground. If continuity is indicated, the circuit is shorted to ground between terminals “a” and “b”.

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