2000 GMC Safari Vehicle Speed Sensors

You can set the rotary dial of the DMM to the Ohm position, disconnect the power feed (i.e. fuse, control module) from the suspect circuit, then disconnect the load, press the MIN MAX button on the DMM, connect one lead of the DMM to one end of the circuit to be tested, and connect the other lead of the DMM to the other end of the circuit. If the DMM displays low or no resistance and a tone is heard, the circuit has good continuity.

Because this prevents incorrect readings. DMMs apply such a small voltage to measure resistance that the presence of voltages can upset a resistance reading.

You will need to ensure that the circuits which include any solid state control modules, such as the PCM, should only be tested with a 10 mega-ohm or higher impedance digital multimeter such as the J 39200.

The tubing will shrink completely as the heat is moved along the insulation and a small amount of sealant will come out of the end of the tubing when sufficient shrinkage is achieved.

You will need to repair the wire by splicing in a new section of wire of the same gauge size (0.5 mm, 0.8 mm, 1.0 mm, etc.). You can use the sealed splices and splice crimping tool from the J38125-B.