Thermal sleeve with reflective positioning member, assembly therewith and method of construction thereof

1. A method of constructing a sleeve for protecting an electronic member connected to a wiring harness against exposure to heat, comprising:

providing a tubular member including a circumferentially continuous wall with an insulative inner layer bounding an inner cavity extending along a central longitudinal axis between open opposite ends and a reflective outer layer;

providing a positioning member constructed of a resilient reflective metal material, the positioning member having a tubular portion and at least one resilient finger extending radially inwardly from the tubular portion for abutment with a wiring harness;

fixing the tubular portion of the positioning member to one of the opposite ends of the wall of said tubular member; and

further including providing the at least one resilient finger extending in oblique relation from said wall of said tubular member, such that said at least one resilient finger deflects radially outwardly while installing the sleeve in a first axial assembly direction over the wiring harness and resist flexing radially outwardly to prevent removal of the sleeve in a second axial disassembly direction absent manually lifting said at least one resilient finger radially outwardly from the wiring harness.

2. The method of claim 1 , further including providing the at least one resilient finger as a plurality of resilient fingers.

3. The method of claim 2 , further including providing the plurality of resilient fingers having lengthwise extending edges overlapping one another.

4. The method of claim 1 , further including providing the positioning member having opposite edges wrapped into overlapping relation with one another.

5. The method of claim 1 , further including providing the positioning member as an extruded tube of metal.