Overheating switch and cable harness
Disconnect battery ground strap, disconnect cables at dual relay and pull out of engine compartment, then remove heater.
Turn tensioner on overheating switch to one side, then take overheating switch and cap out of housing.
Disconnect cables from glow-spark plug, ignition coil, fuel pump and thermo switch.
Remove grommet on combustion air blower motor socket and disconnect push-on terminals.
Open clamp for cable harness on heater and remove harness.
Connect cables to heater units according to wiring diagram and secure cable harness with clamp.
Carefully insert overheating switch and cap into housing and secure with tensioner.
Install heater and pull cable harness through grommet into engine compartment. Connect cables to dual relay according to wiring diagram.
Connect battery ground strap.