Connection Procedure Using Soldering

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Perform the "Connection Procedure Using Crimp Terminal" for aluminum wiring connection.

Line up the cores of the wiring harnesses to be connected as shown in the figure.

Fig 1: Aligning Cores Of Wiring Harness
Courtesy of MAZDA MOTORS CORP.
Twist together both of the cores.

Fig 2: Twisting Cores
Courtesy of MAZDA MOTORS CORP.
Apply solder to the twisted core area.

Fig 3: Soldering Twisted Core Area
Courtesy of MAZDA MOTORS CORP.
CAUTION:
- Soldering for a long period of time could affect the surrounding electrical circuit. Apply soldering for an extremely short period of time.
Cut the ends off the connected area, and apply the soldering iron tip to the wiring harness after removing any fraying.

Fig 4: Applying Soldering Iron Tip
Courtesy of MAZDA MOTORS CORP.
Set the heat-shrinkable tubing to the soldered area and shrink the heat-shrinkable tubing at a temperature of approx. 100 degrees C using a drier until the plastic melts on both ends.

CAUTION:

Completely shrink the heat shrinkable tubing to the wiring harness leaving no gaps.
Perform the work being careful not to melt the insulation of the wiring harness by excessive heat.

Fig 5: Setting Heat-Shrinkable Tubing

Courtesy of MAZDA MOTORS CORP.