| All values measured to ground unless otherwise noted | |||
| N10 | |||
| 1 | Circuit 30 power input | Ignition on, 12 VDC | |
| 2 | Main ground to W1 | Approx. 0 Ohms to ground or measure to circuit 30 12 VDC |
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| 3 | Defrost "off" signal input | Ignition on, 12 VDC with S14 set to "off" pos. | |
| 5 | Defrost "on" signal input | Ignition on, 12 VDC with S14 set to "on" pos. | |
| 6 | Circuit 87 output, powers defrost element from circuit 30 |
Ignition on, 12 VDC with defrost mode on | after 20 min.system will be switched off automatically |