Relay III · Engine Compartment
| Relay | III |
| Location | Engine Compartment |
| Years | 1981–1983 |
| Vehicles | 911 Turbo |
| Confidence | Cross Referenced |
Source: Porsche Technical Specifications, WKD 422 720 (911 SC/Turbo 3.3, 78-81 Models), page 102 (Fuse and Relay Chart for 911 Turbo, 1981 Model); Porsche Technical Specifications, WKD 423110 (911 SC/Turbo, 82,83 Models), page 104 (Zusammenstellung der Sicherungen und Relais, 911 Turbo) - German edition, translated (both list "Rear window defogger" at position III)