Page 248 - Foton Workshop Manual - Tunland (AT)

04-102 DIAGNOSTICS - ENGINE CONTROL SYSTEM

04

Remove the blown-out fuse, and measure the resistance between the load side of the
blown-out fuse and the ground. Turn off all switches connected to the circuit where the said
fuse stays. If the resistance measured at this moment approximates to 0, a short-circuit must
occur in some places of the switches or loads. If the resistance is not 0, no short circuit exist
at this moment; however, transient short circuit may cause fuse burn-out.
Major factors leading to short circuits are listed as follows:
• Harness is nipped up by the vehicle body

• Sheath of the harness is damaged due to wear or heat
• Water enters into the connecters or circuits
• Human errors (mal-operation short circuit etc.)

1 Battery
2 Fuse

3 Load switch

4 Fuse burn-out
5 Short circuit occurring position

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