| All values measured to ground unless otherwise noted | |||
| S50 | |||
| 1 | Main ground to W18 | Approx. 0 Ohms to ground | |
| 2 | Circuit 58d input, "Dimmed Instrum. Illumination" voltage | Varies from 0.5 to 12 VDC, depending on setting of dimming value | Short protected, current decoupled from circ. 58k |
| 3 | Left outside rearview mirror in/out and up/down adjustment output | Ignition on, S50 switched to left: 12 VDC to pin 7 with switch pressed to left, voltage reversed with switch pressed to right, 12 VDC to pin 5 with switch pressed forward, voltage reversed with switch pressed to backward |
Note 1 |
| 4 | Right outside rearview mirror in/out and up/down adjustment output | Ignition on, S50 switched to right: 12 VDC to pin 8 with switch pressed to left, voltage reversed with switch pressed to right, 12 VDC to pin 5 with switch pressed forward, voltage reversed with switch pressed to backward |
Note 1 |
| 5 | Right and left outside rearview mirror up/down adjustment output | Note 1 See pins 3 and 4 | |
| 6 | Circuit 15 switched power input | 12 VDC with ignition on | |
| 7 | Left outside rearview mirror in/out adjustment output | See pin 3 | |
| 8 | Right outside rearview mirror in/out adjustment output | See pin 4 | |
| M21/1 | |||
| 1.1 | Circuit 15 switched power input for mirror heating | 12 VDC with ignition on | Note 2 |
| 1.2 | Main ground to W18 | Approx. 0 Ohms to ground | |
| 1.3 | Horizontal mirror adjustment power input | Ignition on, driver side selected: 12 VDC to pin 4, voltage reversed with S50 pressed left or right |
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| 1.4 | Horizontal/vertical mirror adjustment power input | See pins 3 and 5 | |
| 1.5 | Vertical mirror adjustment power input | ||
| M21/2 | |||
| 1 | Circuit 15 switched power input for mirror heating | 12 VDC with ignition on | Note 2 |
| 2 | Main ground to W19 | Approx. 0 Ohms to ground | |
| 3 | Vertical mirror adjustment power input | Ignition on, passenger side selected: 12 VDC to pin 4, voltage reversed with S50 pressed up or down |
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| 4 | Horizontal/vertical mirror adjustment power input | See pins 3 and 5 | |
| 5 | Horizontal mirror adjustment power input | Ignition on, passenger side selected: 12 VDC to pin 4, voltage reversed with S50 pressed left or right |
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| Note 1 | Refer to D. M. Body & Accessoires Volume 3 12.5 for mirror motors and heating | ||
| Note 2 | Heater switching thresholds: < 15° C (59° F) : heater ON > 25° C (77° F) : heater OFF |
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