MoTeC M880 - Manual (Page 27)

MoTeC Installation 25
Soldering the terminal is a last resort if the correct crimping tool is not
available. Soldering will cause a stress point where the solder wicks up the
wire which is likely to fracture unless all movement is avoided. Solder flux can
also cause corrosion and may affect the contacts.
Terminal Damage
The various connector terminals are easily damaged if probes are inserted
into them. Do not insert probes of any kind into the terminals. If checking a
circuit for continuity gently touch the side of the terminals only, or preferably
attach a mating connector.
Wire Splicing
Preferably use a crimp splice. If soldering a wire splice, wire movement near
the joint must be avoided otherwise a fracture may occur at the stress point
created by the solder. Use heatshrink sleeving to insulate and provide support
to the wires.
Wire Strain
Avoid pulling the wires tight at the connectors.
Wire Movement
Avoid wire fatigue by tying the wires down close to the connectors.
Heat
Keep the ECU wires away from the exhaust system.